/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 02:28:26,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 02:28:26,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 02:28:26,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-04-15 02:28:26,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-04-15 02:28:26,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-04-15 02:28:26,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-04-15 02:28:26,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-04-15 02:28:26,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-04-15 02:28:26,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-04-15 02:28:26,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-04-15 02:28:26,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-04-15 02:28:26,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-15 02:28:26,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-15 02:28:26,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-15 02:28:26,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-15 02:28:26,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-15 02:28:26,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-15 02:28:26,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-15 02:28:26,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-15 02:28:26,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-15 02:28:26,138 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-15 02:28:26,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-15 02:28:26,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-15 02:28:26,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-04-15 02:28:26,143 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-04-15 02:28:26,143 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-04-15 02:28:26,144 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-04-15 02:28:26,145 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-04-15 02:28:26,145 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-04-15 02:28:26,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-04-15 02:28:26,146 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-04-15 02:28:26,147 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-04-15 02:28:26,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-04-15 02:28:26,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-04-15 02:28:26,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-04-15 02:28:26,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-04-15 02:28:26,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-04-15 02:28:26,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-15 02:28:26,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-15 02:28:26,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-15 02:28:26,153 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-04-15 02:28:26,182 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 02:28:26,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 02:28:26,183 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 02:28:26,183 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 02:28:26,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 02:28:26,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 02:28:26,185 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 02:28:26,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 02:28:26,186 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 02:28:26,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 02:28:26,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 02:28:26,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 02:28:26,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 02:28:26,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 02:28:26,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 02:28:26,187 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 02:28:26,187 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 02:28:26,187 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 02:28:26,187 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 02:28:26,187 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 02:28:26,187 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 02:28:26,187 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 02:28:26,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 02:28:26,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 02:28:26,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 02:28:26,188 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 02:28:26,188 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 02:28:26,188 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 02:28:26,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 02:28:26,188 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 02:28:26,188 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 02:28:26,188 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 02:28:26,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 02:28:26,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 02:28:26,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 02:28:26,447 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 02:28:26,448 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 02:28:26,449 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-2.wvr.bpl [2021-04-15 02:28:26,449 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-2.wvr.bpl' [2021-04-15 02:28:26,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 02:28:26,481 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 02:28:26,482 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 02:28:26,482 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 02:28:26,482 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 02:28:26,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:28:26" (1/1) ... [2021-04-15 02:28:26,502 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:28:26" (1/1) ... [2021-04-15 02:28:26,507 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 02:28:26,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 02:28:26,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 02:28:26,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 02:28:26,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:28:26" (1/1) ... [2021-04-15 02:28:26,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:28:26" (1/1) ... [2021-04-15 02:28:26,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:28:26" (1/1) ... [2021-04-15 02:28:26,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:28:26" (1/1) ... [2021-04-15 02:28:26,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:28:26" (1/1) ... [2021-04-15 02:28:26,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:28:26" (1/1) ... [2021-04-15 02:28:26,522 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:28:26" (1/1) ... [2021-04-15 02:28:26,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 02:28:26,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 02:28:26,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 02:28:26,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 02:28:26,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:28:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 02:28:26,570 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 02:28:26,570 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 02:28:26,570 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 02:28:26,570 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 02:28:26,570 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 02:28:26,570 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 02:28:26,571 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 02:28:26,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 02:28:26,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 02:28:26,571 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 02:28:26,730 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 02:28:26,730 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-04-15 02:28:26,731 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-04-15 02:28:26,732 INFO L202 PluginConnector]: Adding new model unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 02:28:26 BoogieIcfgContainer [2021-04-15 02:28:26,732 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 02:28:26,733 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 02:28:26,733 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 02:28:26,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 02:28:26,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:28:26" (1/2) ... [2021-04-15 02:28:26,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a798524 and model type unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 02:28:26, skipping insertion in model container [2021-04-15 02:28:26,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 02:28:26" (2/2) ... [2021-04-15 02:28:26,736 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.bpl [2021-04-15 02:28:26,739 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 02:28:26,739 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 02:28:26,741 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 02:28:26,742 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 02:28:26,783 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-04-15 02:28:26,793 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-04-15 02:28:26,813 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 02:28:26,813 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 02:28:26,813 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 02:28:26,813 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 02:28:26,813 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 02:28:26,813 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 02:28:26,813 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 02:28:26,813 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 02:28:26,818 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-04-15 02:28:26,843 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:26,845 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:26,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-04-15 02:28:26,848 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:26,849 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:26,849 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:26,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:26,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1485035801, now seen corresponding path program 1 times [2021-04-15 02:28:26,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:26,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302622211] [2021-04-15 02:28:26,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:27,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:27,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302622211] [2021-04-15 02:28:27,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:28:27,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 02:28:27,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629959944] [2021-04-15 02:28:27,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:28:27,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:27,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:28:27,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:28:27,029 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:27,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:27,056 INFO L93 Difference]: Finished difference Result 26 states and 43 transitions. [2021-04-15 02:28:27,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 02:28:27,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-04-15 02:28:27,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:27,062 INFO L225 Difference]: With dead ends: 26 [2021-04-15 02:28:27,062 INFO L226 Difference]: Without dead ends: 18 [2021-04-15 02:28:27,063 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:28:27,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-04-15 02:28:27,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-04-15 02:28:27,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:27,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2021-04-15 02:28:27,081 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 10 [2021-04-15 02:28:27,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:27,082 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2021-04-15 02:28:27,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:27,082 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2021-04-15 02:28:27,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-04-15 02:28:27,082 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:27,082 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:27,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 02:28:27,083 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:27,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:27,083 INFO L82 PathProgramCache]: Analyzing trace with hash -258877683, now seen corresponding path program 2 times [2021-04-15 02:28:27,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:27,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243729488] [2021-04-15 02:28:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:27,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243729488] [2021-04-15 02:28:27,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:28:27,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 02:28:27,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631453427] [2021-04-15 02:28:27,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:28:27,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:27,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:28:27,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:28:27,126 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:27,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:27,156 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-04-15 02:28:27,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:28:27,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-04-15 02:28:27,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:27,159 INFO L225 Difference]: With dead ends: 28 [2021-04-15 02:28:27,159 INFO L226 Difference]: Without dead ends: 23 [2021-04-15 02:28:27,160 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:28:27,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-04-15 02:28:27,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-04-15 02:28:27,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:27,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-04-15 02:28:27,166 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-04-15 02:28:27,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:27,167 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-04-15 02:28:27,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:27,167 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-04-15 02:28:27,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-15 02:28:27,167 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:27,168 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:27,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 02:28:27,168 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:27,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:27,169 INFO L82 PathProgramCache]: Analyzing trace with hash -2042651181, now seen corresponding path program 1 times [2021-04-15 02:28:27,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:27,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290866434] [2021-04-15 02:28:27,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:27,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290866434] [2021-04-15 02:28:27,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064710147] [2021-04-15 02:28:27,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:27,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:28:27,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:27,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 02:28:27,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:27,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:27,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:27,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-04-15 02:28:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:27,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:27,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-04-15 02:28:27,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939332346] [2021-04-15 02:28:27,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:28:27,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:27,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:28:27,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:28:27,463 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:27,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:27,505 INFO L93 Difference]: Finished difference Result 32 states and 58 transitions. [2021-04-15 02:28:27,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:28:27,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-04-15 02:28:27,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:27,506 INFO L225 Difference]: With dead ends: 32 [2021-04-15 02:28:27,506 INFO L226 Difference]: Without dead ends: 27 [2021-04-15 02:28:27,506 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:28:27,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-04-15 02:28:27,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-04-15 02:28:27,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:27,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 46 transitions. [2021-04-15 02:28:27,509 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 46 transitions. Word has length 11 [2021-04-15 02:28:27,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:27,509 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 46 transitions. [2021-04-15 02:28:27,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:27,509 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 46 transitions. [2021-04-15 02:28:27,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-15 02:28:27,510 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:27,510 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:27,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-04-15 02:28:27,725 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:27,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:27,725 INFO L82 PathProgramCache]: Analyzing trace with hash -413298669, now seen corresponding path program 2 times [2021-04-15 02:28:27,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:27,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466249785] [2021-04-15 02:28:27,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:27,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:27,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466249785] [2021-04-15 02:28:27,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849909669] [2021-04-15 02:28:27,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:27,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:28:27,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:27,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:28:27,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:27,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 02:28:27,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:27,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:27,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:27,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-04-15 02:28:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:27,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:27,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-04-15 02:28:27,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364707368] [2021-04-15 02:28:27,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:28:27,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:27,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:28:27,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:28:27,868 INFO L87 Difference]: Start difference. First operand 25 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:27,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:27,923 INFO L93 Difference]: Finished difference Result 43 states and 71 transitions. [2021-04-15 02:28:27,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:28:27,924 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-04-15 02:28:27,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:27,925 INFO L225 Difference]: With dead ends: 43 [2021-04-15 02:28:27,925 INFO L226 Difference]: Without dead ends: 38 [2021-04-15 02:28:27,925 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:28:27,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-04-15 02:28:27,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2021-04-15 02:28:27,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:27,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 49 transitions. [2021-04-15 02:28:27,933 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 49 transitions. Word has length 11 [2021-04-15 02:28:27,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:27,933 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 49 transitions. [2021-04-15 02:28:27,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:27,934 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 49 transitions. [2021-04-15 02:28:27,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-15 02:28:27,934 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:27,934 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:28,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:28,149 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:28,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:28,149 INFO L82 PathProgramCache]: Analyzing trace with hash -2049322798, now seen corresponding path program 1 times [2021-04-15 02:28:28,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:28,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385844236] [2021-04-15 02:28:28,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:28,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385844236] [2021-04-15 02:28:28,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:28:28,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 02:28:28,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076528244] [2021-04-15 02:28:28,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 02:28:28,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:28,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 02:28:28,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:28:28,170 INFO L87 Difference]: Start difference. First operand 27 states and 49 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:28,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:28,187 INFO L93 Difference]: Finished difference Result 30 states and 55 transitions. [2021-04-15 02:28:28,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 02:28:28,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-04-15 02:28:28,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:28,188 INFO L225 Difference]: With dead ends: 30 [2021-04-15 02:28:28,188 INFO L226 Difference]: Without dead ends: 30 [2021-04-15 02:28:28,188 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:28:28,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-04-15 02:28:28,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-04-15 02:28:28,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:28,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2021-04-15 02:28:28,193 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 11 [2021-04-15 02:28:28,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:28,194 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2021-04-15 02:28:28,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:28,194 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2021-04-15 02:28:28,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-15 02:28:28,194 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:28,194 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:28,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-04-15 02:28:28,194 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:28,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:28,195 INFO L82 PathProgramCache]: Analyzing trace with hash 268202073, now seen corresponding path program 3 times [2021-04-15 02:28:28,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:28,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21259784] [2021-04-15 02:28:28,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:28,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:28,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21259784] [2021-04-15 02:28:28,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847486902] [2021-04-15 02:28:28,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:28,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 02:28:28,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:28,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 02:28:28,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:28,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:28,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:28,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-04-15 02:28:28,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935164516] [2021-04-15 02:28:28,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 02:28:28,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:28,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 02:28:28,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:28:28,289 INFO L87 Difference]: Start difference. First operand 28 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:28,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:28,322 INFO L93 Difference]: Finished difference Result 51 states and 85 transitions. [2021-04-15 02:28:28,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 02:28:28,339 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-04-15 02:28:28,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:28,341 INFO L225 Difference]: With dead ends: 51 [2021-04-15 02:28:28,341 INFO L226 Difference]: Without dead ends: 51 [2021-04-15 02:28:28,341 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:28:28,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-04-15 02:28:28,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2021-04-15 02:28:28,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:28,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 54 transitions. [2021-04-15 02:28:28,351 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 54 transitions. Word has length 12 [2021-04-15 02:28:28,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:28,351 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 54 transitions. [2021-04-15 02:28:28,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:28,351 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 54 transitions. [2021-04-15 02:28:28,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-15 02:28:28,351 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:28,351 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:28,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:28,557 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:28,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:28,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1927934254, now seen corresponding path program 1 times [2021-04-15 02:28:28,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:28,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443670659] [2021-04-15 02:28:28,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:28,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:28,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443670659] [2021-04-15 02:28:28,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468842185] [2021-04-15 02:28:28,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:28,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 02:28:28,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:28,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:28,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-04-15 02:28:28,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600840560] [2021-04-15 02:28:28,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 02:28:28,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:28,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 02:28:28,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:28:28,647 INFO L87 Difference]: Start difference. First operand 28 states and 54 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:28,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:28,689 INFO L93 Difference]: Finished difference Result 57 states and 97 transitions. [2021-04-15 02:28:28,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:28:28,690 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-04-15 02:28:28,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:28,690 INFO L225 Difference]: With dead ends: 57 [2021-04-15 02:28:28,690 INFO L226 Difference]: Without dead ends: 54 [2021-04-15 02:28:28,690 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:28:28,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-04-15 02:28:28,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 32. [2021-04-15 02:28:28,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:28,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 63 transitions. [2021-04-15 02:28:28,692 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 63 transitions. Word has length 12 [2021-04-15 02:28:28,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:28,693 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 63 transitions. [2021-04-15 02:28:28,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:28,693 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 63 transitions. [2021-04-15 02:28:28,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-15 02:28:28,693 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:28,693 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:28,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:28,897 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:28,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:28,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1897554585, now seen corresponding path program 4 times [2021-04-15 02:28:28,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:28,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936892650] [2021-04-15 02:28:28,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:28,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936892650] [2021-04-15 02:28:28,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001165235] [2021-04-15 02:28:28,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:28:28,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:28:28,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:28,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 02:28:28,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:28,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:28,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:28,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-04-15 02:28:28,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093724153] [2021-04-15 02:28:28,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 02:28:28,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:28,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 02:28:28,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:28:28,991 INFO L87 Difference]: Start difference. First operand 32 states and 63 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:29,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:29,026 INFO L93 Difference]: Finished difference Result 43 states and 76 transitions. [2021-04-15 02:28:29,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:28:29,026 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-04-15 02:28:29,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:29,027 INFO L225 Difference]: With dead ends: 43 [2021-04-15 02:28:29,027 INFO L226 Difference]: Without dead ends: 41 [2021-04-15 02:28:29,027 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:28:29,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-04-15 02:28:29,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-04-15 02:28:29,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:29,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 62 transitions. [2021-04-15 02:28:29,029 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 62 transitions. Word has length 12 [2021-04-15 02:28:29,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:29,029 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 62 transitions. [2021-04-15 02:28:29,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:29,029 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 62 transitions. [2021-04-15 02:28:29,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-15 02:28:29,029 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:29,029 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:29,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-04-15 02:28:29,243 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:29,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:29,243 INFO L82 PathProgramCache]: Analyzing trace with hash 261530456, now seen corresponding path program 2 times [2021-04-15 02:28:29,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:29,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707569260] [2021-04-15 02:28:29,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:29,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:29,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707569260] [2021-04-15 02:28:29,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117910694] [2021-04-15 02:28:29,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:29,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:28:29,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:29,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 02:28:29,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:29,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:29,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-04-15 02:28:29,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466637530] [2021-04-15 02:28:29,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 02:28:29,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:29,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 02:28:29,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:28:29,313 INFO L87 Difference]: Start difference. First operand 32 states and 62 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:29,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:29,345 INFO L93 Difference]: Finished difference Result 45 states and 79 transitions. [2021-04-15 02:28:29,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 02:28:29,345 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-04-15 02:28:29,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:29,346 INFO L225 Difference]: With dead ends: 45 [2021-04-15 02:28:29,346 INFO L226 Difference]: Without dead ends: 45 [2021-04-15 02:28:29,346 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:28:29,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-04-15 02:28:29,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2021-04-15 02:28:29,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:29,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 58 transitions. [2021-04-15 02:28:29,348 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 58 transitions. Word has length 12 [2021-04-15 02:28:29,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:29,348 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 58 transitions. [2021-04-15 02:28:29,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:29,348 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 58 transitions. [2021-04-15 02:28:29,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-15 02:28:29,348 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:29,348 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:29,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:29,557 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:29,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:29,557 INFO L82 PathProgramCache]: Analyzing trace with hash -905381939, now seen corresponding path program 5 times [2021-04-15 02:28:29,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:29,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206948503] [2021-04-15 02:28:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:29,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206948503] [2021-04-15 02:28:29,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:28:29,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 02:28:29,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142944410] [2021-04-15 02:28:29,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:28:29,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:29,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:28:29,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:28:29,579 INFO L87 Difference]: Start difference. First operand 31 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:29,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:29,590 INFO L93 Difference]: Finished difference Result 33 states and 59 transitions. [2021-04-15 02:28:29,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:28:29,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-04-15 02:28:29,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:29,591 INFO L225 Difference]: With dead ends: 33 [2021-04-15 02:28:29,591 INFO L226 Difference]: Without dead ends: 29 [2021-04-15 02:28:29,591 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:28:29,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-04-15 02:28:29,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-04-15 02:28:29,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:29,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-04-15 02:28:29,593 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-04-15 02:28:29,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:29,593 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-04-15 02:28:29,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:29,593 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-04-15 02:28:29,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-15 02:28:29,593 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:29,593 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:29,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-04-15 02:28:29,593 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:29,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:29,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1796703570, now seen corresponding path program 3 times [2021-04-15 02:28:29,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:29,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582722566] [2021-04-15 02:28:29,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:29,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582722566] [2021-04-15 02:28:29,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616327943] [2021-04-15 02:28:29,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:29,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:28:29,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:29,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 02:28:29,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:29,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:29,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-04-15 02:28:29,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455496158] [2021-04-15 02:28:29,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 02:28:29,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:29,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 02:28:29,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:28:29,682 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:29,720 INFO L93 Difference]: Finished difference Result 40 states and 75 transitions. [2021-04-15 02:28:29,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 02:28:29,721 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-04-15 02:28:29,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:29,721 INFO L225 Difference]: With dead ends: 40 [2021-04-15 02:28:29,721 INFO L226 Difference]: Without dead ends: 40 [2021-04-15 02:28:29,721 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:28:29,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-04-15 02:28:29,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-04-15 02:28:29,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:29,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 63 transitions. [2021-04-15 02:28:29,723 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 63 transitions. Word has length 12 [2021-04-15 02:28:29,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:29,723 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 63 transitions. [2021-04-15 02:28:29,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:29,723 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 63 transitions. [2021-04-15 02:28:29,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:28:29,723 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:29,724 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:29,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-04-15 02:28:29,929 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:29,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:29,929 INFO L82 PathProgramCache]: Analyzing trace with hash 549941096, now seen corresponding path program 4 times [2021-04-15 02:28:29,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:29,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103358366] [2021-04-15 02:28:29,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:29,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:29,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103358366] [2021-04-15 02:28:29,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242784161] [2021-04-15 02:28:29,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:30,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:28:30,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:30,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 02:28:30,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:30,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:30,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-04-15 02:28:30,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:30,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:30,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:30,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-04-15 02:28:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:30,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:30,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 02:28:30,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162771597] [2021-04-15 02:28:30,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:28:30,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:30,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:28:30,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:28:30,131 INFO L87 Difference]: Start difference. First operand 33 states and 63 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:30,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:30,198 INFO L93 Difference]: Finished difference Result 48 states and 90 transitions. [2021-04-15 02:28:30,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:28:30,199 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:28:30,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:30,199 INFO L225 Difference]: With dead ends: 48 [2021-04-15 02:28:30,199 INFO L226 Difference]: Without dead ends: 38 [2021-04-15 02:28:30,199 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:28:30,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-04-15 02:28:30,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-04-15 02:28:30,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:30,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 67 transitions. [2021-04-15 02:28:30,201 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 67 transitions. Word has length 13 [2021-04-15 02:28:30,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:30,201 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 67 transitions. [2021-04-15 02:28:30,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:30,201 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 67 transitions. [2021-04-15 02:28:30,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:28:30,201 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:30,201 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:30,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-04-15 02:28:30,409 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:30,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:30,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1116462702, now seen corresponding path program 5 times [2021-04-15 02:28:30,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:30,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420829490] [2021-04-15 02:28:30,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:30,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420829490] [2021-04-15 02:28:30,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396560712] [2021-04-15 02:28:30,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:30,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:28:30,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:30,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 02:28:30,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:30,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:30,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-04-15 02:28:30,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:30,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:30,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:30,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-04-15 02:28:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:30,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:30,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 02:28:30,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819104457] [2021-04-15 02:28:30,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:28:30,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:30,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:28:30,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:28:30,615 INFO L87 Difference]: Start difference. First operand 35 states and 67 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:30,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:30,710 INFO L93 Difference]: Finished difference Result 59 states and 114 transitions. [2021-04-15 02:28:30,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:28:30,710 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:28:30,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:30,710 INFO L225 Difference]: With dead ends: 59 [2021-04-15 02:28:30,710 INFO L226 Difference]: Without dead ends: 45 [2021-04-15 02:28:30,711 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:28:30,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-04-15 02:28:30,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-04-15 02:28:30,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:30,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2021-04-15 02:28:30,712 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 13 [2021-04-15 02:28:30,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:30,713 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2021-04-15 02:28:30,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:30,713 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2021-04-15 02:28:30,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:28:30,713 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:30,713 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:30,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-04-15 02:28:30,927 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:30,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:30,927 INFO L82 PathProgramCache]: Analyzing trace with hash -257588172, now seen corresponding path program 6 times [2021-04-15 02:28:30,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:30,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871389016] [2021-04-15 02:28:30,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:30,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:30,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:30,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871389016] [2021-04-15 02:28:30,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494114923] [2021-04-15 02:28:30,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:30,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:28:30,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:30,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 02:28:30,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:31,103 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:31,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-04-15 02:28:31,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:28:31,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:31,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-04-15 02:28:31,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:31,138 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 02:28:31,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:28:31,139 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-04-15 02:28:31,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:31,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:31,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 02:28:31,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074933612] [2021-04-15 02:28:31,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:28:31,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:31,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:28:31,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:28:31,171 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:31,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:31,303 INFO L93 Difference]: Finished difference Result 76 states and 152 transitions. [2021-04-15 02:28:31,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:28:31,303 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:28:31,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:31,305 INFO L225 Difference]: With dead ends: 76 [2021-04-15 02:28:31,305 INFO L226 Difference]: Without dead ends: 66 [2021-04-15 02:28:31,305 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:28:31,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-04-15 02:28:31,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 38. [2021-04-15 02:28:31,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:31,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2021-04-15 02:28:31,314 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 13 [2021-04-15 02:28:31,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:31,314 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2021-04-15 02:28:31,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:31,314 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2021-04-15 02:28:31,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:28:31,316 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:31,317 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:31,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:31,533 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:31,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:31,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1120270568, now seen corresponding path program 7 times [2021-04-15 02:28:31,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:31,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213634208] [2021-04-15 02:28:31,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:31,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:31,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213634208] [2021-04-15 02:28:31,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067609145] [2021-04-15 02:28:31,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:31,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 02:28:31,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:31,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:31,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-04-15 02:28:31,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:31,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:31,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:31,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-04-15 02:28:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:31,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:31,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 02:28:31,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113781472] [2021-04-15 02:28:31,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:28:31,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:31,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:28:31,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:28:31,720 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:31,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:31,829 INFO L93 Difference]: Finished difference Result 61 states and 123 transitions. [2021-04-15 02:28:31,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:28:31,829 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:28:31,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:31,830 INFO L225 Difference]: With dead ends: 61 [2021-04-15 02:28:31,830 INFO L226 Difference]: Without dead ends: 47 [2021-04-15 02:28:31,831 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:28:31,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-04-15 02:28:31,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2021-04-15 02:28:31,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.261904761904762) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:31,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 95 transitions. [2021-04-15 02:28:31,834 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 95 transitions. Word has length 13 [2021-04-15 02:28:31,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:31,834 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 95 transitions. [2021-04-15 02:28:31,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:31,834 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 95 transitions. [2021-04-15 02:28:31,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:28:31,835 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:31,835 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:32,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-04-15 02:28:32,049 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:32,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:32,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1979145098, now seen corresponding path program 8 times [2021-04-15 02:28:32,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:32,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789499955] [2021-04-15 02:28:32,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:32,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789499955] [2021-04-15 02:28:32,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028347164] [2021-04-15 02:28:32,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:28:32,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:28:32,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:32,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 02:28:32,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:32,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:32,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-04-15 02:28:32,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:28:32,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:32,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-04-15 02:28:32,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:32,240 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 02:28:32,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:28:32,241 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-04-15 02:28:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:32,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:32,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 02:28:32,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368990485] [2021-04-15 02:28:32,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:28:32,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:32,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:28:32,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:28:32,270 INFO L87 Difference]: Start difference. First operand 43 states and 95 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:32,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:32,410 INFO L93 Difference]: Finished difference Result 84 states and 165 transitions. [2021-04-15 02:28:32,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:28:32,410 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:28:32,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:32,411 INFO L225 Difference]: With dead ends: 84 [2021-04-15 02:28:32,411 INFO L226 Difference]: Without dead ends: 67 [2021-04-15 02:28:32,411 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 131.0ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:28:32,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-04-15 02:28:32,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2021-04-15 02:28:32,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:32,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 94 transitions. [2021-04-15 02:28:32,414 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 94 transitions. Word has length 13 [2021-04-15 02:28:32,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:32,414 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 94 transitions. [2021-04-15 02:28:32,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:32,414 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 94 transitions. [2021-04-15 02:28:32,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:28:32,415 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:32,415 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:32,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-04-15 02:28:32,621 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:32,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:32,621 INFO L82 PathProgramCache]: Analyzing trace with hash -605208890, now seen corresponding path program 9 times [2021-04-15 02:28:32,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:32,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227995036] [2021-04-15 02:28:32,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:32,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227995036] [2021-04-15 02:28:32,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965802584] [2021-04-15 02:28:32,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:32,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:28:32,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:32,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 02:28:32,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:32,782 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:32,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-04-15 02:28:32,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:28:32,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:32,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-04-15 02:28:32,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:32,819 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 02:28:32,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:28:32,819 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-04-15 02:28:32,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:32,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:32,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 02:28:32,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128650529] [2021-04-15 02:28:32,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:28:32,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:32,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:28:32,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:28:32,843 INFO L87 Difference]: Start difference. First operand 43 states and 94 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:32,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:32,999 INFO L93 Difference]: Finished difference Result 64 states and 135 transitions. [2021-04-15 02:28:32,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:28:33,000 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:28:33,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:33,000 INFO L225 Difference]: With dead ends: 64 [2021-04-15 02:28:33,000 INFO L226 Difference]: Without dead ends: 59 [2021-04-15 02:28:33,001 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 165.9ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:28:33,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-04-15 02:28:33,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 43. [2021-04-15 02:28:33,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:33,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 94 transitions. [2021-04-15 02:28:33,004 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 94 transitions. Word has length 13 [2021-04-15 02:28:33,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:33,004 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 94 transitions. [2021-04-15 02:28:33,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:33,004 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 94 transitions. [2021-04-15 02:28:33,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:28:33,006 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:33,006 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:33,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-04-15 02:28:33,220 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:33,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:33,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1739525202, now seen corresponding path program 10 times [2021-04-15 02:28:33,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:33,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34091770] [2021-04-15 02:28:33,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:33,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34091770] [2021-04-15 02:28:33,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980658781] [2021-04-15 02:28:33,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:33,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:28:33,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:33,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 02:28:33,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:33,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:33,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-04-15 02:28:33,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:33,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:33,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:33,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-04-15 02:28:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:33,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:33,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 02:28:33,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657305614] [2021-04-15 02:28:33,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:28:33,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:33,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:28:33,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:28:33,389 INFO L87 Difference]: Start difference. First operand 43 states and 94 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:33,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:33,505 INFO L93 Difference]: Finished difference Result 67 states and 142 transitions. [2021-04-15 02:28:33,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:28:33,505 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:28:33,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:33,506 INFO L225 Difference]: With dead ends: 67 [2021-04-15 02:28:33,506 INFO L226 Difference]: Without dead ends: 53 [2021-04-15 02:28:33,506 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:28:33,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-04-15 02:28:33,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2021-04-15 02:28:33,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 47 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:33,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 111 transitions. [2021-04-15 02:28:33,511 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 111 transitions. Word has length 13 [2021-04-15 02:28:33,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:33,511 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 111 transitions. [2021-04-15 02:28:33,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:33,511 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 111 transitions. [2021-04-15 02:28:33,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:28:33,512 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:33,512 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:33,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:33,712 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:33,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:33,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1696567564, now seen corresponding path program 11 times [2021-04-15 02:28:33,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:33,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293773927] [2021-04-15 02:28:33,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:33,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293773927] [2021-04-15 02:28:33,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019924235] [2021-04-15 02:28:33,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:33,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:28:33,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:33,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 02:28:33,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:33,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:33,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-04-15 02:28:33,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:28:33,895 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:33,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-04-15 02:28:33,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:33,910 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 02:28:33,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:28:33,911 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-04-15 02:28:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:33,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:33,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 02:28:33,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802574652] [2021-04-15 02:28:33,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:28:33,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:33,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:28:33,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:28:33,933 INFO L87 Difference]: Start difference. First operand 48 states and 111 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:34,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:34,114 INFO L93 Difference]: Finished difference Result 89 states and 192 transitions. [2021-04-15 02:28:34,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:28:34,115 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:28:34,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:34,116 INFO L225 Difference]: With dead ends: 89 [2021-04-15 02:28:34,116 INFO L226 Difference]: Without dead ends: 79 [2021-04-15 02:28:34,116 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 179.4ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:28:34,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-04-15 02:28:34,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 48. [2021-04-15 02:28:34,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 47 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:34,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 111 transitions. [2021-04-15 02:28:34,124 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 111 transitions. Word has length 13 [2021-04-15 02:28:34,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:34,124 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 111 transitions. [2021-04-15 02:28:34,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:34,124 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 111 transitions. [2021-04-15 02:28:34,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:28:34,125 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:34,125 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:34,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-04-15 02:28:34,340 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:34,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:34,341 INFO L82 PathProgramCache]: Analyzing trace with hash 14045744, now seen corresponding path program 12 times [2021-04-15 02:28:34,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:34,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852646498] [2021-04-15 02:28:34,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:34,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852646498] [2021-04-15 02:28:34,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398465276] [2021-04-15 02:28:34,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:34,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-04-15 02:28:34,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:34,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 02:28:34,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:34,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:34,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-04-15 02:28:34,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:28:34,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:34,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-04-15 02:28:34,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:34,527 INFO L628 ElimStorePlain]: treesize reduction 17, result has 46.9 percent of original size [2021-04-15 02:28:34,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:28:34,528 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-04-15 02:28:34,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:34,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:34,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 02:28:34,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966123176] [2021-04-15 02:28:34,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:28:34,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:34,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:28:34,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:28:34,551 INFO L87 Difference]: Start difference. First operand 48 states and 111 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:34,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:34,708 INFO L93 Difference]: Finished difference Result 72 states and 158 transitions. [2021-04-15 02:28:34,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:28:34,708 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:28:34,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:34,710 INFO L225 Difference]: With dead ends: 72 [2021-04-15 02:28:34,710 INFO L226 Difference]: Without dead ends: 67 [2021-04-15 02:28:34,710 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 169.1ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:28:34,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-04-15 02:28:34,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2021-04-15 02:28:34,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 47 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:34,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 111 transitions. [2021-04-15 02:28:34,713 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 111 transitions. Word has length 13 [2021-04-15 02:28:34,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:34,713 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 111 transitions. [2021-04-15 02:28:34,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:34,714 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 111 transitions. [2021-04-15 02:28:34,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:28:34,714 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:34,714 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:34,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:34,925 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:34,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:34,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1503450740, now seen corresponding path program 13 times [2021-04-15 02:28:34,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:34,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857271815] [2021-04-15 02:28:34,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:34,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857271815] [2021-04-15 02:28:34,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681874800] [2021-04-15 02:28:34,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:28:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:34,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 02:28:34,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:35,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:35,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-04-15 02:28:35,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:28:35,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:35,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-04-15 02:28:35,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:35,102 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 02:28:35,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:28:35,103 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-04-15 02:28:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:35,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:35,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 02:28:35,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447363757] [2021-04-15 02:28:35,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:28:35,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:35,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:28:35,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:28:35,124 INFO L87 Difference]: Start difference. First operand 48 states and 111 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:35,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:35,293 INFO L93 Difference]: Finished difference Result 77 states and 171 transitions. [2021-04-15 02:28:35,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:28:35,294 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:28:35,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:35,294 INFO L225 Difference]: With dead ends: 77 [2021-04-15 02:28:35,294 INFO L226 Difference]: Without dead ends: 72 [2021-04-15 02:28:35,295 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:28:35,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-04-15 02:28:35,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2021-04-15 02:28:35,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.326530612244898) internal successors, (114), 49 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:35,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 114 transitions. [2021-04-15 02:28:35,296 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 114 transitions. Word has length 13 [2021-04-15 02:28:35,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:35,296 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 114 transitions. [2021-04-15 02:28:35,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:35,296 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 114 transitions. [2021-04-15 02:28:35,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:28:35,297 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:35,297 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:35,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:35,511 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:35,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:35,511 INFO L82 PathProgramCache]: Analyzing trace with hash 781826158, now seen corresponding path program 14 times [2021-04-15 02:28:35,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:35,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055300767] [2021-04-15 02:28:35,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:35,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055300767] [2021-04-15 02:28:35,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601725551] [2021-04-15 02:28:35,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:35,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:28:35,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:35,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 02:28:35,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:35,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:35,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-04-15 02:28:35,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:35,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:35,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:35,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-04-15 02:28:35,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:35,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:35,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 02:28:35,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545707911] [2021-04-15 02:28:35,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:28:35,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:35,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:28:35,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:28:35,704 INFO L87 Difference]: Start difference. First operand 50 states and 114 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:35,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:35,805 INFO L93 Difference]: Finished difference Result 68 states and 151 transitions. [2021-04-15 02:28:35,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:28:35,805 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:28:35,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:35,813 INFO L225 Difference]: With dead ends: 68 [2021-04-15 02:28:35,813 INFO L226 Difference]: Without dead ends: 63 [2021-04-15 02:28:35,814 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 132.1ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:28:35,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-04-15 02:28:35,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2021-04-15 02:28:35,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.327272727272727) internal successors, (128), 55 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:35,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 128 transitions. [2021-04-15 02:28:35,816 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 128 transitions. Word has length 14 [2021-04-15 02:28:35,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:35,816 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 128 transitions. [2021-04-15 02:28:35,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:35,816 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 128 transitions. [2021-04-15 02:28:35,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:28:35,817 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:35,817 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:36,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-04-15 02:28:36,025 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:36,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:36,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1352155630, now seen corresponding path program 15 times [2021-04-15 02:28:36,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:36,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665102669] [2021-04-15 02:28:36,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:36,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:36,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665102669] [2021-04-15 02:28:36,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729450102] [2021-04-15 02:28:36,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:36,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:28:36,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:36,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 02:28:36,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:36,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:36,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-04-15 02:28:36,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:36,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:36,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:36,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-04-15 02:28:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:36,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:36,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 02:28:36,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944831491] [2021-04-15 02:28:36,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:28:36,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:36,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:28:36,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:28:36,207 INFO L87 Difference]: Start difference. First operand 56 states and 128 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:36,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:36,323 INFO L93 Difference]: Finished difference Result 91 states and 189 transitions. [2021-04-15 02:28:36,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:28:36,323 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:28:36,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:36,324 INFO L225 Difference]: With dead ends: 91 [2021-04-15 02:28:36,324 INFO L226 Difference]: Without dead ends: 86 [2021-04-15 02:28:36,324 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:28:36,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-04-15 02:28:36,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2021-04-15 02:28:36,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.327272727272727) internal successors, (128), 55 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:36,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 128 transitions. [2021-04-15 02:28:36,327 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 128 transitions. Word has length 14 [2021-04-15 02:28:36,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:36,328 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 128 transitions. [2021-04-15 02:28:36,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:36,328 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 128 transitions. [2021-04-15 02:28:36,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:28:36,328 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:36,328 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:36,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:36,533 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:36,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:36,533 INFO L82 PathProgramCache]: Analyzing trace with hash -373323828, now seen corresponding path program 16 times [2021-04-15 02:28:36,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:36,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702403893] [2021-04-15 02:28:36,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:36,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702403893] [2021-04-15 02:28:36,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748627573] [2021-04-15 02:28:36,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:36,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:28:36,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:36,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 02:28:36,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:36,688 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:36,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-04-15 02:28:36,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:36,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:36,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:36,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-04-15 02:28:36,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:36,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:36,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 02:28:36,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117214850] [2021-04-15 02:28:36,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:28:36,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:36,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:28:36,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:28:36,707 INFO L87 Difference]: Start difference. First operand 56 states and 128 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:36,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:36,855 INFO L93 Difference]: Finished difference Result 91 states and 193 transitions. [2021-04-15 02:28:36,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:28:36,856 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:28:36,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:36,860 INFO L225 Difference]: With dead ends: 91 [2021-04-15 02:28:36,860 INFO L226 Difference]: Without dead ends: 86 [2021-04-15 02:28:36,860 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:28:36,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-04-15 02:28:36,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 58. [2021-04-15 02:28:36,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:36,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 133 transitions. [2021-04-15 02:28:36,862 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 133 transitions. Word has length 14 [2021-04-15 02:28:36,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:36,862 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 133 transitions. [2021-04-15 02:28:36,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:36,862 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 133 transitions. [2021-04-15 02:28:36,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:28:36,862 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:36,862 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:37,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-04-15 02:28:37,069 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:37,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:37,069 INFO L82 PathProgramCache]: Analyzing trace with hash -2009347957, now seen corresponding path program 17 times [2021-04-15 02:28:37,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:37,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218240380] [2021-04-15 02:28:37,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:37,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218240380] [2021-04-15 02:28:37,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378204081] [2021-04-15 02:28:37,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:37,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:28:37,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:37,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 02:28:37,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:37,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:37,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:37,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-04-15 02:28:37,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836674467] [2021-04-15 02:28:37,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:28:37,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:37,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:28:37,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:28:37,155 INFO L87 Difference]: Start difference. First operand 58 states and 133 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:37,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:37,182 INFO L93 Difference]: Finished difference Result 121 states and 238 transitions. [2021-04-15 02:28:37,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:28:37,185 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:28:37,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:37,185 INFO L225 Difference]: With dead ends: 121 [2021-04-15 02:28:37,185 INFO L226 Difference]: Without dead ends: 121 [2021-04-15 02:28:37,185 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:28:37,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-04-15 02:28:37,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 62. [2021-04-15 02:28:37,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4262295081967213) internal successors, (148), 61 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:37,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 148 transitions. [2021-04-15 02:28:37,187 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 148 transitions. Word has length 14 [2021-04-15 02:28:37,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:37,187 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 148 transitions. [2021-04-15 02:28:37,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:37,187 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 148 transitions. [2021-04-15 02:28:37,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:28:37,187 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:37,187 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:37,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:37,393 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:37,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:37,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1971410264, now seen corresponding path program 18 times [2021-04-15 02:28:37,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:37,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998379382] [2021-04-15 02:28:37,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:37,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:37,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998379382] [2021-04-15 02:28:37,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861894147] [2021-04-15 02:28:37,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:37,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:28:37,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:37,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 02:28:37,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:37,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:37,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-04-15 02:28:37,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:37,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:37,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:37,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-04-15 02:28:37,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:37,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:37,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 02:28:37,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427428585] [2021-04-15 02:28:37,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:28:37,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:37,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:28:37,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:28:37,570 INFO L87 Difference]: Start difference. First operand 62 states and 148 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:37,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:37,689 INFO L93 Difference]: Finished difference Result 85 states and 189 transitions. [2021-04-15 02:28:37,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:28:37,689 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:28:37,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:37,689 INFO L225 Difference]: With dead ends: 85 [2021-04-15 02:28:37,689 INFO L226 Difference]: Without dead ends: 80 [2021-04-15 02:28:37,690 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 124.6ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:28:37,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-04-15 02:28:37,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2021-04-15 02:28:37,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4262295081967213) internal successors, (148), 61 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:37,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 148 transitions. [2021-04-15 02:28:37,691 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 148 transitions. Word has length 14 [2021-04-15 02:28:37,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:37,691 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 148 transitions. [2021-04-15 02:28:37,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:37,691 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 148 transitions. [2021-04-15 02:28:37,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:28:37,692 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:37,692 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:37,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:37,901 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:37,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:37,901 INFO L82 PathProgramCache]: Analyzing trace with hash 245930806, now seen corresponding path program 19 times [2021-04-15 02:28:37,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:37,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956993542] [2021-04-15 02:28:37,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:37,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956993542] [2021-04-15 02:28:37,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096312326] [2021-04-15 02:28:37,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:37,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 02:28:37,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:38,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:38,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-04-15 02:28:38,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:38,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:38,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:38,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-04-15 02:28:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:38,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:38,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 02:28:38,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468367528] [2021-04-15 02:28:38,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:28:38,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:38,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:28:38,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:28:38,060 INFO L87 Difference]: Start difference. First operand 62 states and 148 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:38,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:38,163 INFO L93 Difference]: Finished difference Result 88 states and 187 transitions. [2021-04-15 02:28:38,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:28:38,164 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:28:38,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:38,164 INFO L225 Difference]: With dead ends: 88 [2021-04-15 02:28:38,164 INFO L226 Difference]: Without dead ends: 83 [2021-04-15 02:28:38,164 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 108.9ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:28:38,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-04-15 02:28:38,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 62. [2021-04-15 02:28:38,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4262295081967213) internal successors, (148), 61 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:38,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 148 transitions. [2021-04-15 02:28:38,166 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 148 transitions. Word has length 14 [2021-04-15 02:28:38,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:38,166 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 148 transitions. [2021-04-15 02:28:38,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:38,166 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 148 transitions. [2021-04-15 02:28:38,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:28:38,166 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:38,166 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:38,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-04-15 02:28:38,374 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:38,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:38,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1735335802, now seen corresponding path program 20 times [2021-04-15 02:28:38,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:38,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515472465] [2021-04-15 02:28:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:38,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515472465] [2021-04-15 02:28:38,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462960592] [2021-04-15 02:28:38,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:38,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:28:38,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:38,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 02:28:38,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:38,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:38,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-04-15 02:28:38,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:38,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:38,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:38,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-04-15 02:28:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:38,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:38,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 02:28:38,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825300352] [2021-04-15 02:28:38,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:28:38,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:38,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:28:38,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:28:38,544 INFO L87 Difference]: Start difference. First operand 62 states and 148 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:38,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:38,666 INFO L93 Difference]: Finished difference Result 100 states and 215 transitions. [2021-04-15 02:28:38,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:28:38,666 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:28:38,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:38,666 INFO L225 Difference]: With dead ends: 100 [2021-04-15 02:28:38,666 INFO L226 Difference]: Without dead ends: 95 [2021-04-15 02:28:38,667 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 124.6ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:28:38,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-04-15 02:28:38,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 62. [2021-04-15 02:28:38,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4262295081967213) internal successors, (148), 61 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:38,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 148 transitions. [2021-04-15 02:28:38,668 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 148 transitions. Word has length 14 [2021-04-15 02:28:38,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:38,668 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 148 transitions. [2021-04-15 02:28:38,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:38,668 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 148 transitions. [2021-04-15 02:28:38,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:28:38,668 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:38,669 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:38,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:38,877 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:38,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:38,877 INFO L82 PathProgramCache]: Analyzing trace with hash 844014171, now seen corresponding path program 21 times [2021-04-15 02:28:38,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:38,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091714143] [2021-04-15 02:28:38,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:38,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091714143] [2021-04-15 02:28:38,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986371280] [2021-04-15 02:28:38,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:38,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:28:38,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:38,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 02:28:38,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:38,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:38,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-04-15 02:28:38,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664506534] [2021-04-15 02:28:38,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:28:38,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:38,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:28:38,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:28:38,950 INFO L87 Difference]: Start difference. First operand 62 states and 148 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:39,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:39,005 INFO L93 Difference]: Finished difference Result 145 states and 286 transitions. [2021-04-15 02:28:39,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:28:39,006 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:28:39,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:39,006 INFO L225 Difference]: With dead ends: 145 [2021-04-15 02:28:39,006 INFO L226 Difference]: Without dead ends: 145 [2021-04-15 02:28:39,006 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:28:39,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-04-15 02:28:39,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 68. [2021-04-15 02:28:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5223880597014925) internal successors, (169), 67 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:39,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2021-04-15 02:28:39,008 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 14 [2021-04-15 02:28:39,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:39,008 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2021-04-15 02:28:39,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:39,008 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2021-04-15 02:28:39,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:28:39,009 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:39,009 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:39,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-04-15 02:28:39,221 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:39,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:39,221 INFO L82 PathProgramCache]: Analyzing trace with hash -306532562, now seen corresponding path program 22 times [2021-04-15 02:28:39,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:39,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305852646] [2021-04-15 02:28:39,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:39,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:39,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305852646] [2021-04-15 02:28:39,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157761795] [2021-04-15 02:28:39,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:39,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:28:39,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:39,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 02:28:39,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:39,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:39,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-04-15 02:28:39,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:39,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:39,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:39,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-04-15 02:28:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:39,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:39,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 02:28:39,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716029188] [2021-04-15 02:28:39,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:28:39,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:39,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:28:39,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:28:39,385 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:39,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:39,496 INFO L93 Difference]: Finished difference Result 86 states and 210 transitions. [2021-04-15 02:28:39,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:28:39,497 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:28:39,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:39,497 INFO L225 Difference]: With dead ends: 86 [2021-04-15 02:28:39,497 INFO L226 Difference]: Without dead ends: 81 [2021-04-15 02:28:39,497 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:28:39,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-04-15 02:28:39,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 68. [2021-04-15 02:28:39,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5223880597014925) internal successors, (169), 67 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:39,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2021-04-15 02:28:39,499 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 14 [2021-04-15 02:28:39,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:39,499 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2021-04-15 02:28:39,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:39,500 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2021-04-15 02:28:39,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:28:39,500 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:39,500 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:39,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-04-15 02:28:39,714 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:39,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:39,715 INFO L82 PathProgramCache]: Analyzing trace with hash -2032012020, now seen corresponding path program 23 times [2021-04-15 02:28:39,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:39,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857298563] [2021-04-15 02:28:39,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:39,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:39,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857298563] [2021-04-15 02:28:39,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791577303] [2021-04-15 02:28:39,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:39,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:28:39,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:39,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 02:28:39,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:39,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:39,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-04-15 02:28:39,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:39,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:39,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:39,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-04-15 02:28:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:39,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:39,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 02:28:39,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811571355] [2021-04-15 02:28:39,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:28:39,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:39,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:28:39,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:28:39,861 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:39,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:39,949 INFO L93 Difference]: Finished difference Result 95 states and 213 transitions. [2021-04-15 02:28:39,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:28:39,949 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:28:39,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:39,950 INFO L225 Difference]: With dead ends: 95 [2021-04-15 02:28:39,950 INFO L226 Difference]: Without dead ends: 90 [2021-04-15 02:28:39,950 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:28:39,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-04-15 02:28:39,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 68. [2021-04-15 02:28:39,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5223880597014925) internal successors, (169), 67 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:39,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2021-04-15 02:28:39,952 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 14 [2021-04-15 02:28:39,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:39,952 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2021-04-15 02:28:39,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:39,952 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2021-04-15 02:28:39,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:28:39,952 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:39,952 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:40,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-04-15 02:28:40,166 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:40,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:40,166 INFO L82 PathProgramCache]: Analyzing trace with hash 626931147, now seen corresponding path program 24 times [2021-04-15 02:28:40,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:40,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669988484] [2021-04-15 02:28:40,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:40,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669988484] [2021-04-15 02:28:40,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040396583] [2021-04-15 02:28:40,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:28:40,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:28:40,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:40,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 02:28:40,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:40,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:40,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-04-15 02:28:40,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685471386] [2021-04-15 02:28:40,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:28:40,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:40,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:28:40,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:28:40,233 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:40,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:40,257 INFO L93 Difference]: Finished difference Result 127 states and 274 transitions. [2021-04-15 02:28:40,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 02:28:40,258 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:28:40,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:40,258 INFO L225 Difference]: With dead ends: 127 [2021-04-15 02:28:40,258 INFO L226 Difference]: Without dead ends: 127 [2021-04-15 02:28:40,258 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:28:40,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-04-15 02:28:40,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 77. [2021-04-15 02:28:40,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.6052631578947367) internal successors, (198), 76 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:40,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 198 transitions. [2021-04-15 02:28:40,260 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 198 transitions. Word has length 14 [2021-04-15 02:28:40,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:40,260 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 198 transitions. [2021-04-15 02:28:40,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:40,260 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 198 transitions. [2021-04-15 02:28:40,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:28:40,261 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:40,261 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:40,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:40,465 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:40,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:40,466 INFO L82 PathProgramCache]: Analyzing trace with hash -542607024, now seen corresponding path program 25 times [2021-04-15 02:28:40,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:40,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754628976] [2021-04-15 02:28:40,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:40,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754628976] [2021-04-15 02:28:40,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510770646] [2021-04-15 02:28:40,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:28:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:40,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 02:28:40,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:40,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:40,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-04-15 02:28:40,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:40,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:40,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:40,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-04-15 02:28:40,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:40,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:40,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 02:28:40,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163514083] [2021-04-15 02:28:40,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:28:40,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:40,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:28:40,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:28:40,622 INFO L87 Difference]: Start difference. First operand 77 states and 198 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:40,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:40,732 INFO L93 Difference]: Finished difference Result 108 states and 241 transitions. [2021-04-15 02:28:40,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:28:40,732 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:28:40,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:40,732 INFO L225 Difference]: With dead ends: 108 [2021-04-15 02:28:40,732 INFO L226 Difference]: Without dead ends: 103 [2021-04-15 02:28:40,733 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:28:40,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-04-15 02:28:40,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 77. [2021-04-15 02:28:40,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.6052631578947367) internal successors, (198), 76 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:40,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 198 transitions. [2021-04-15 02:28:40,736 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 198 transitions. Word has length 14 [2021-04-15 02:28:40,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:40,736 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 198 transitions. [2021-04-15 02:28:40,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:40,736 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 198 transitions. [2021-04-15 02:28:40,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:28:40,736 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:40,736 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:40,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-04-15 02:28:40,951 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:40,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:40,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1433928655, now seen corresponding path program 26 times [2021-04-15 02:28:40,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:40,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264992492] [2021-04-15 02:28:40,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:40,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264992492] [2021-04-15 02:28:40,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046446160] [2021-04-15 02:28:40,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:40,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:28:40,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:41,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 02:28:41,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:41,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:41,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-04-15 02:28:41,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621395908] [2021-04-15 02:28:41,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:28:41,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:41,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:28:41,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:28:41,030 INFO L87 Difference]: Start difference. First operand 77 states and 198 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:41,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:41,087 INFO L93 Difference]: Finished difference Result 141 states and 294 transitions. [2021-04-15 02:28:41,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:28:41,087 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:28:41,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:41,087 INFO L225 Difference]: With dead ends: 141 [2021-04-15 02:28:41,087 INFO L226 Difference]: Without dead ends: 141 [2021-04-15 02:28:41,088 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:28:41,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-04-15 02:28:41,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 73. [2021-04-15 02:28:41,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.5694444444444446) internal successors, (185), 72 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:41,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2021-04-15 02:28:41,089 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 14 [2021-04-15 02:28:41,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:41,089 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2021-04-15 02:28:41,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:41,090 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2021-04-15 02:28:41,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:28:41,090 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:41,090 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:41,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:41,305 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:41,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:41,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1615692404, now seen corresponding path program 27 times [2021-04-15 02:28:41,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:41,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988792049] [2021-04-15 02:28:41,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:41,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:41,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988792049] [2021-04-15 02:28:41,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564700251] [2021-04-15 02:28:41,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:41,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:28:41,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:41,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 02:28:41,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:41,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:41,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-04-15 02:28:41,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:41,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:41,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:41,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-04-15 02:28:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:41,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:41,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 02:28:41,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950103586] [2021-04-15 02:28:41,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:28:41,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:41,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:28:41,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:28:41,482 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:41,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:41,639 INFO L93 Difference]: Finished difference Result 126 states and 281 transitions. [2021-04-15 02:28:41,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:28:41,639 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:28:41,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:41,640 INFO L225 Difference]: With dead ends: 126 [2021-04-15 02:28:41,640 INFO L226 Difference]: Without dead ends: 121 [2021-04-15 02:28:41,640 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:28:41,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-04-15 02:28:41,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2021-04-15 02:28:41,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.5405405405405403) internal successors, (188), 74 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:41,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 188 transitions. [2021-04-15 02:28:41,642 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 188 transitions. Word has length 14 [2021-04-15 02:28:41,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:41,642 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 188 transitions. [2021-04-15 02:28:41,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:41,642 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 188 transitions. [2021-04-15 02:28:41,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:28:41,642 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:41,642 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:41,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-04-15 02:28:41,848 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:41,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:41,848 INFO L82 PathProgramCache]: Analyzing trace with hash -896073077, now seen corresponding path program 28 times [2021-04-15 02:28:41,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:41,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174749250] [2021-04-15 02:28:41,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:41,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:41,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174749250] [2021-04-15 02:28:41,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165685570] [2021-04-15 02:28:41,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:41,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:28:41,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:41,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 02:28:41,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:41,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:41,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-04-15 02:28:41,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399594856] [2021-04-15 02:28:41,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:28:41,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:41,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:28:41,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:28:41,912 INFO L87 Difference]: Start difference. First operand 75 states and 188 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:41,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:41,968 INFO L93 Difference]: Finished difference Result 117 states and 263 transitions. [2021-04-15 02:28:41,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:28:41,969 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:28:41,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:41,969 INFO L225 Difference]: With dead ends: 117 [2021-04-15 02:28:41,969 INFO L226 Difference]: Without dead ends: 117 [2021-04-15 02:28:41,969 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:28:41,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-04-15 02:28:41,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2021-04-15 02:28:41,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.569620253164557) internal successors, (203), 79 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:41,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2021-04-15 02:28:41,973 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 14 [2021-04-15 02:28:41,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:41,973 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2021-04-15 02:28:41,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:41,974 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2021-04-15 02:28:41,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:28:41,974 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:41,974 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:42,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-04-15 02:28:42,188 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:42,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:42,189 INFO L82 PathProgramCache]: Analyzing trace with hash -619671512, now seen corresponding path program 29 times [2021-04-15 02:28:42,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:42,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236211003] [2021-04-15 02:28:42,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:42,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236211003] [2021-04-15 02:28:42,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560165493] [2021-04-15 02:28:42,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:42,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:28:42,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:42,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:28:42,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:42,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:42,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-04-15 02:28:42,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368621881] [2021-04-15 02:28:42,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:28:42,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:42,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:28:42,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:28:42,274 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:42,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:42,337 INFO L93 Difference]: Finished difference Result 152 states and 318 transitions. [2021-04-15 02:28:42,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:28:42,342 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:28:42,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:42,342 INFO L225 Difference]: With dead ends: 152 [2021-04-15 02:28:42,342 INFO L226 Difference]: Without dead ends: 152 [2021-04-15 02:28:42,342 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:28:42,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-04-15 02:28:42,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 83. [2021-04-15 02:28:42,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.6463414634146343) internal successors, (217), 82 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:42,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 217 transitions. [2021-04-15 02:28:42,345 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 217 transitions. Word has length 15 [2021-04-15 02:28:42,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:42,345 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 217 transitions. [2021-04-15 02:28:42,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:42,345 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 217 transitions. [2021-04-15 02:28:42,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:28:42,345 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:42,345 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:42,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-04-15 02:28:42,560 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:42,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:42,560 INFO L82 PathProgramCache]: Analyzing trace with hash -707581453, now seen corresponding path program 30 times [2021-04-15 02:28:42,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:42,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336836109] [2021-04-15 02:28:42,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:42,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336836109] [2021-04-15 02:28:42,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089869166] [2021-04-15 02:28:42,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:42,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:28:42,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:42,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:28:42,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:42,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:42,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-04-15 02:28:42,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956939979] [2021-04-15 02:28:42,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:28:42,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:42,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:28:42,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:28:42,646 INFO L87 Difference]: Start difference. First operand 83 states and 217 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:42,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:42,734 INFO L93 Difference]: Finished difference Result 156 states and 340 transitions. [2021-04-15 02:28:42,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:28:42,734 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:28:42,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:42,735 INFO L225 Difference]: With dead ends: 156 [2021-04-15 02:28:42,735 INFO L226 Difference]: Without dead ends: 151 [2021-04-15 02:28:42,735 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:28:42,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-04-15 02:28:42,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 90. [2021-04-15 02:28:42,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.640449438202247) internal successors, (235), 89 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:42,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 235 transitions. [2021-04-15 02:28:42,737 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 235 transitions. Word has length 15 [2021-04-15 02:28:42,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:42,737 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 235 transitions. [2021-04-15 02:28:42,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:42,737 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 235 transitions. [2021-04-15 02:28:42,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:28:42,737 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:42,737 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:42,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-04-15 02:28:42,949 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:42,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:42,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1774821498, now seen corresponding path program 31 times [2021-04-15 02:28:42,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:42,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98921529] [2021-04-15 02:28:42,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:42,971 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:42,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98921529] [2021-04-15 02:28:42,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697643239] [2021-04-15 02:28:42,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:42,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:28:42,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:43,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:43,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-04-15 02:28:43,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152665498] [2021-04-15 02:28:43,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:28:43,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:43,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:28:43,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:28:43,026 INFO L87 Difference]: Start difference. First operand 90 states and 235 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:43,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:43,089 INFO L93 Difference]: Finished difference Result 119 states and 275 transitions. [2021-04-15 02:28:43,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:28:43,089 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:28:43,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:43,089 INFO L225 Difference]: With dead ends: 119 [2021-04-15 02:28:43,090 INFO L226 Difference]: Without dead ends: 115 [2021-04-15 02:28:43,090 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:28:43,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-04-15 02:28:43,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2021-04-15 02:28:43,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.5934065934065935) internal successors, (236), 91 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:43,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 236 transitions. [2021-04-15 02:28:43,092 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 236 transitions. Word has length 15 [2021-04-15 02:28:43,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:43,092 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 236 transitions. [2021-04-15 02:28:43,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:43,092 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 236 transitions. [2021-04-15 02:28:43,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:28:43,092 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:43,092 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:43,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-04-15 02:28:43,305 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:43,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:43,305 INFO L82 PathProgramCache]: Analyzing trace with hash 884121669, now seen corresponding path program 32 times [2021-04-15 02:28:43,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:43,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642142343] [2021-04-15 02:28:43,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:43,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:43,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642142343] [2021-04-15 02:28:43,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930793753] [2021-04-15 02:28:43,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:43,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:28:43,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:43,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:28:43,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:43,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:43,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-04-15 02:28:43,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377276931] [2021-04-15 02:28:43,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:28:43,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:43,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:28:43,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:28:43,372 INFO L87 Difference]: Start difference. First operand 92 states and 236 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:43,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:43,404 INFO L93 Difference]: Finished difference Result 156 states and 331 transitions. [2021-04-15 02:28:43,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:28:43,405 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:28:43,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:43,405 INFO L225 Difference]: With dead ends: 156 [2021-04-15 02:28:43,405 INFO L226 Difference]: Without dead ends: 156 [2021-04-15 02:28:43,405 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:28:43,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-04-15 02:28:43,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 89. [2021-04-15 02:28:43,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.5454545454545454) internal successors, (224), 88 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:43,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 224 transitions. [2021-04-15 02:28:43,407 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 224 transitions. Word has length 15 [2021-04-15 02:28:43,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:43,407 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 224 transitions. [2021-04-15 02:28:43,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:43,407 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 224 transitions. [2021-04-15 02:28:43,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:28:43,408 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:43,408 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:43,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-04-15 02:28:43,608 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:43,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:43,609 INFO L82 PathProgramCache]: Analyzing trace with hash 333838132, now seen corresponding path program 33 times [2021-04-15 02:28:43,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:43,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016903369] [2021-04-15 02:28:43,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:43,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016903369] [2021-04-15 02:28:43,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474632269] [2021-04-15 02:28:43,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:43,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:28:43,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:43,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:28:43,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:43,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:43,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:43,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-04-15 02:28:43,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640851859] [2021-04-15 02:28:43,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:28:43,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:43,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:28:43,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:28:43,675 INFO L87 Difference]: Start difference. First operand 89 states and 224 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:43,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:43,731 INFO L93 Difference]: Finished difference Result 126 states and 290 transitions. [2021-04-15 02:28:43,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:28:43,731 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:28:43,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:43,731 INFO L225 Difference]: With dead ends: 126 [2021-04-15 02:28:43,731 INFO L226 Difference]: Without dead ends: 122 [2021-04-15 02:28:43,732 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:28:43,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-04-15 02:28:43,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 89. [2021-04-15 02:28:43,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.534090909090909) internal successors, (223), 88 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:43,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 223 transitions. [2021-04-15 02:28:43,733 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 223 transitions. Word has length 15 [2021-04-15 02:28:43,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:43,733 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 223 transitions. [2021-04-15 02:28:43,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:43,734 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 223 transitions. [2021-04-15 02:28:43,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:28:43,734 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:43,734 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:43,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-04-15 02:28:43,945 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:43,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:43,945 INFO L82 PathProgramCache]: Analyzing trace with hash -557483499, now seen corresponding path program 34 times [2021-04-15 02:28:43,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:43,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921767438] [2021-04-15 02:28:43,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:43,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:43,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921767438] [2021-04-15 02:28:43,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863895946] [2021-04-15 02:28:43,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:43,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:28:43,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:43,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:28:43,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:44,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:44,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-04-15 02:28:44,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850192348] [2021-04-15 02:28:44,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:28:44,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:44,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:28:44,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:28:44,012 INFO L87 Difference]: Start difference. First operand 89 states and 223 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:44,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:44,056 INFO L93 Difference]: Finished difference Result 160 states and 342 transitions. [2021-04-15 02:28:44,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:28:44,057 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:28:44,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:44,057 INFO L225 Difference]: With dead ends: 160 [2021-04-15 02:28:44,057 INFO L226 Difference]: Without dead ends: 160 [2021-04-15 02:28:44,057 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:28:44,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-04-15 02:28:44,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 89. [2021-04-15 02:28:44,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.534090909090909) internal successors, (223), 88 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:44,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 223 transitions. [2021-04-15 02:28:44,059 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 223 transitions. Word has length 15 [2021-04-15 02:28:44,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:44,059 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 223 transitions. [2021-04-15 02:28:44,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:44,059 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 223 transitions. [2021-04-15 02:28:44,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:28:44,060 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:44,060 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:44,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-04-15 02:28:44,274 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:44,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:44,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1708030232, now seen corresponding path program 35 times [2021-04-15 02:28:44,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:44,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452073204] [2021-04-15 02:28:44,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:44,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452073204] [2021-04-15 02:28:44,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993305996] [2021-04-15 02:28:44,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:44,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:28:44,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:44,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:28:44,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:44,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:44,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-04-15 02:28:44,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433638819] [2021-04-15 02:28:44,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:28:44,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:44,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:28:44,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:28:44,348 INFO L87 Difference]: Start difference. First operand 89 states and 223 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:44,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:44,373 INFO L93 Difference]: Finished difference Result 180 states and 397 transitions. [2021-04-15 02:28:44,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:28:44,373 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:28:44,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:44,374 INFO L225 Difference]: With dead ends: 180 [2021-04-15 02:28:44,374 INFO L226 Difference]: Without dead ends: 180 [2021-04-15 02:28:44,374 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:28:44,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-04-15 02:28:44,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 97. [2021-04-15 02:28:44,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.6354166666666665) internal successors, (253), 96 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:44,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 253 transitions. [2021-04-15 02:28:44,376 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 253 transitions. Word has length 15 [2021-04-15 02:28:44,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:44,377 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 253 transitions. [2021-04-15 02:28:44,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:44,377 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 253 transitions. [2021-04-15 02:28:44,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:28:44,377 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:44,377 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:44,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-04-15 02:28:44,585 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:44,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:44,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1809787465, now seen corresponding path program 36 times [2021-04-15 02:28:44,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:44,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664660211] [2021-04-15 02:28:44,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:44,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664660211] [2021-04-15 02:28:44,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585190318] [2021-04-15 02:28:44,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:44,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:28:44,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:44,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:28:44,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:44,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:44,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:44,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-04-15 02:28:44,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354184337] [2021-04-15 02:28:44,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:28:44,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:44,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:28:44,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:28:44,647 INFO L87 Difference]: Start difference. First operand 97 states and 253 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:44,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:44,691 INFO L93 Difference]: Finished difference Result 152 states and 341 transitions. [2021-04-15 02:28:44,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:28:44,692 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:28:44,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:44,692 INFO L225 Difference]: With dead ends: 152 [2021-04-15 02:28:44,692 INFO L226 Difference]: Without dead ends: 150 [2021-04-15 02:28:44,692 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:28:44,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-04-15 02:28:44,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 103. [2021-04-15 02:28:44,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.676470588235294) internal successors, (273), 102 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:44,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 273 transitions. [2021-04-15 02:28:44,694 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 273 transitions. Word has length 15 [2021-04-15 02:28:44,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:44,695 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 273 transitions. [2021-04-15 02:28:44,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:44,695 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 273 transitions. [2021-04-15 02:28:44,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:28:44,695 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:44,695 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:44,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:44,910 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:44,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:44,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1944104694, now seen corresponding path program 37 times [2021-04-15 02:28:44,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:44,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165034171] [2021-04-15 02:28:44,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:44,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165034171] [2021-04-15 02:28:44,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388081130] [2021-04-15 02:28:44,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:44,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:44,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:28:44,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:44,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:44,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-04-15 02:28:44,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697298992] [2021-04-15 02:28:44,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:28:44,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:44,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:28:44,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:28:44,975 INFO L87 Difference]: Start difference. First operand 103 states and 273 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:45,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:45,054 INFO L93 Difference]: Finished difference Result 161 states and 375 transitions. [2021-04-15 02:28:45,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:28:45,055 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:28:45,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:45,055 INFO L225 Difference]: With dead ends: 161 [2021-04-15 02:28:45,055 INFO L226 Difference]: Without dead ends: 155 [2021-04-15 02:28:45,055 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:28:45,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-04-15 02:28:45,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 105. [2021-04-15 02:28:45,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.6538461538461537) internal successors, (276), 104 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:45,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 276 transitions. [2021-04-15 02:28:45,057 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 276 transitions. Word has length 15 [2021-04-15 02:28:45,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:45,057 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 276 transitions. [2021-04-15 02:28:45,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:45,058 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 276 transitions. [2021-04-15 02:28:45,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:28:45,058 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:45,058 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:45,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:45,272 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:45,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:45,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1459540971, now seen corresponding path program 38 times [2021-04-15 02:28:45,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:45,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581292569] [2021-04-15 02:28:45,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:45,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:45,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581292569] [2021-04-15 02:28:45,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187463387] [2021-04-15 02:28:45,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:45,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:28:45,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:45,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:28:45,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:45,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:45,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-04-15 02:28:45,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973182344] [2021-04-15 02:28:45,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:28:45,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:45,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:28:45,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:28:45,333 INFO L87 Difference]: Start difference. First operand 105 states and 276 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:45,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:45,374 INFO L93 Difference]: Finished difference Result 156 states and 350 transitions. [2021-04-15 02:28:45,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:28:45,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:28:45,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:45,375 INFO L225 Difference]: With dead ends: 156 [2021-04-15 02:28:45,375 INFO L226 Difference]: Without dead ends: 156 [2021-04-15 02:28:45,375 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:28:45,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-04-15 02:28:45,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 99. [2021-04-15 02:28:45,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.6020408163265305) internal successors, (255), 98 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:45,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 255 transitions. [2021-04-15 02:28:45,377 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 255 transitions. Word has length 15 [2021-04-15 02:28:45,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:45,377 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 255 transitions. [2021-04-15 02:28:45,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:45,377 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 255 transitions. [2021-04-15 02:28:45,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:28:45,377 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:45,377 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:45,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:45,592 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:45,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:45,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1277777222, now seen corresponding path program 39 times [2021-04-15 02:28:45,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:45,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675240669] [2021-04-15 02:28:45,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:45,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675240669] [2021-04-15 02:28:45,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225693766] [2021-04-15 02:28:45,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:28:45,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:28:45,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:45,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:28:45,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:45,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:45,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-04-15 02:28:45,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123252370] [2021-04-15 02:28:45,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:28:45,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:45,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:28:45,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:28:45,668 INFO L87 Difference]: Start difference. First operand 99 states and 255 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:45,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:45,728 INFO L93 Difference]: Finished difference Result 165 states and 373 transitions. [2021-04-15 02:28:45,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:28:45,728 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:28:45,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:45,728 INFO L225 Difference]: With dead ends: 165 [2021-04-15 02:28:45,728 INFO L226 Difference]: Without dead ends: 159 [2021-04-15 02:28:45,729 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:28:45,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-04-15 02:28:45,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 103. [2021-04-15 02:28:45,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.5686274509803924) internal successors, (262), 102 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:45,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 262 transitions. [2021-04-15 02:28:45,731 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 262 transitions. Word has length 15 [2021-04-15 02:28:45,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:45,731 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 262 transitions. [2021-04-15 02:28:45,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:45,731 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 262 transitions. [2021-04-15 02:28:45,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:28:45,731 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:45,731 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:45,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-04-15 02:28:45,940 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:45,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:45,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1997396549, now seen corresponding path program 40 times [2021-04-15 02:28:45,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:45,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884538876] [2021-04-15 02:28:45,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:45,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884538876] [2021-04-15 02:28:45,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266073331] [2021-04-15 02:28:45,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:45,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:28:45,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:45,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:28:45,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:46,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:46,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-04-15 02:28:46,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841907516] [2021-04-15 02:28:46,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:28:46,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:46,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:28:46,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:28:46,013 INFO L87 Difference]: Start difference. First operand 103 states and 262 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:46,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:46,082 INFO L93 Difference]: Finished difference Result 164 states and 357 transitions. [2021-04-15 02:28:46,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:28:46,082 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:28:46,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:46,083 INFO L225 Difference]: With dead ends: 164 [2021-04-15 02:28:46,083 INFO L226 Difference]: Without dead ends: 164 [2021-04-15 02:28:46,083 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:28:46,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-04-15 02:28:46,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 101. [2021-04-15 02:28:46,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.56) internal successors, (256), 100 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:46,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 256 transitions. [2021-04-15 02:28:46,085 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 256 transitions. Word has length 15 [2021-04-15 02:28:46,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:46,085 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 256 transitions. [2021-04-15 02:28:46,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:46,085 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 256 transitions. [2021-04-15 02:28:46,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:28:46,085 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:46,085 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:46,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-04-15 02:28:46,295 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:46,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:46,295 INFO L82 PathProgramCache]: Analyzing trace with hash 690186194, now seen corresponding path program 41 times [2021-04-15 02:28:46,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:46,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695175971] [2021-04-15 02:28:46,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:46,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:46,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695175971] [2021-04-15 02:28:46,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707001480] [2021-04-15 02:28:46,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:46,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:28:46,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:46,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:28:46,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:46,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:46,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-04-15 02:28:46,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776375608] [2021-04-15 02:28:46,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:28:46,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:46,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:28:46,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:28:46,368 INFO L87 Difference]: Start difference. First operand 101 states and 256 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:46,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:46,410 INFO L93 Difference]: Finished difference Result 205 states and 458 transitions. [2021-04-15 02:28:46,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:28:46,420 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:28:46,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:46,421 INFO L225 Difference]: With dead ends: 205 [2021-04-15 02:28:46,421 INFO L226 Difference]: Without dead ends: 205 [2021-04-15 02:28:46,421 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:28:46,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-04-15 02:28:46,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 119. [2021-04-15 02:28:46,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.73728813559322) internal successors, (323), 118 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 323 transitions. [2021-04-15 02:28:46,424 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 323 transitions. Word has length 15 [2021-04-15 02:28:46,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:46,424 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 323 transitions. [2021-04-15 02:28:46,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:46,424 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 323 transitions. [2021-04-15 02:28:46,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:28:46,424 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:46,424 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:46,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-04-15 02:28:46,633 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:46,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:46,633 INFO L82 PathProgramCache]: Analyzing trace with hash -86963405, now seen corresponding path program 42 times [2021-04-15 02:28:46,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:46,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229037412] [2021-04-15 02:28:46,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:46,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:46,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229037412] [2021-04-15 02:28:46,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858929410] [2021-04-15 02:28:46,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:46,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:28:46,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:46,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:28:46,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:46,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:46,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-04-15 02:28:46,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094670964] [2021-04-15 02:28:46,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:28:46,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:46,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:28:46,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:28:46,704 INFO L87 Difference]: Start difference. First operand 119 states and 323 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:46,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:46,779 INFO L93 Difference]: Finished difference Result 198 states and 459 transitions. [2021-04-15 02:28:46,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:28:46,780 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:28:46,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:46,780 INFO L225 Difference]: With dead ends: 198 [2021-04-15 02:28:46,780 INFO L226 Difference]: Without dead ends: 196 [2021-04-15 02:28:46,780 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:28:46,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-04-15 02:28:46,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 128. [2021-04-15 02:28:46,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.811023622047244) internal successors, (357), 127 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:46,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 357 transitions. [2021-04-15 02:28:46,787 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 357 transitions. Word has length 15 [2021-04-15 02:28:46,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:46,787 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 357 transitions. [2021-04-15 02:28:46,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:46,787 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 357 transitions. [2021-04-15 02:28:46,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:28:46,787 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:46,787 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:47,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-04-15 02:28:47,001 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:47,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:47,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1035293264, now seen corresponding path program 43 times [2021-04-15 02:28:47,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:47,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813597426] [2021-04-15 02:28:47,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:47,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:47,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813597426] [2021-04-15 02:28:47,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315893027] [2021-04-15 02:28:47,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:47,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:28:47,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:47,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:47,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-04-15 02:28:47,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664031976] [2021-04-15 02:28:47,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:28:47,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:47,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:28:47,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:28:47,060 INFO L87 Difference]: Start difference. First operand 128 states and 357 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:47,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:47,129 INFO L93 Difference]: Finished difference Result 206 states and 478 transitions. [2021-04-15 02:28:47,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:28:47,129 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:28:47,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:47,130 INFO L225 Difference]: With dead ends: 206 [2021-04-15 02:28:47,130 INFO L226 Difference]: Without dead ends: 204 [2021-04-15 02:28:47,131 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:28:47,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-04-15 02:28:47,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 128. [2021-04-15 02:28:47,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.8031496062992125) internal successors, (356), 127 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:47,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 356 transitions. [2021-04-15 02:28:47,133 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 356 transitions. Word has length 15 [2021-04-15 02:28:47,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:47,133 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 356 transitions. [2021-04-15 02:28:47,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:47,134 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 356 transitions. [2021-04-15 02:28:47,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:28:47,134 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:47,134 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:47,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:47,348 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:47,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:47,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1623649903, now seen corresponding path program 44 times [2021-04-15 02:28:47,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:47,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806591814] [2021-04-15 02:28:47,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:47,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806591814] [2021-04-15 02:28:47,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189737211] [2021-04-15 02:28:47,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:28:47,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:28:47,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:47,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:28:47,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:47,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:47,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-04-15 02:28:47,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636949031] [2021-04-15 02:28:47,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:28:47,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:47,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:28:47,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:28:47,435 INFO L87 Difference]: Start difference. First operand 128 states and 356 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:47,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:47,464 INFO L93 Difference]: Finished difference Result 187 states and 443 transitions. [2021-04-15 02:28:47,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:28:47,465 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:28:47,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:47,465 INFO L225 Difference]: With dead ends: 187 [2021-04-15 02:28:47,465 INFO L226 Difference]: Without dead ends: 187 [2021-04-15 02:28:47,465 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:28:47,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-04-15 02:28:47,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 129. [2021-04-15 02:28:47,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.7890625) internal successors, (357), 128 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:47,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 357 transitions. [2021-04-15 02:28:47,468 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 357 transitions. Word has length 15 [2021-04-15 02:28:47,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:47,468 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 357 transitions. [2021-04-15 02:28:47,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:47,468 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 357 transitions. [2021-04-15 02:28:47,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:28:47,468 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:47,468 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:47,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-04-15 02:28:47,669 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:47,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:47,669 INFO L82 PathProgramCache]: Analyzing trace with hash 454111732, now seen corresponding path program 45 times [2021-04-15 02:28:47,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:47,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315145299] [2021-04-15 02:28:47,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:47,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:47,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315145299] [2021-04-15 02:28:47,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144036951] [2021-04-15 02:28:47,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:47,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:28:47,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:47,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:28:47,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:47,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:47,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-04-15 02:28:47,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319074612] [2021-04-15 02:28:47,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:28:47,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:47,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:28:47,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:28:47,727 INFO L87 Difference]: Start difference. First operand 129 states and 357 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:47,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:47,777 INFO L93 Difference]: Finished difference Result 215 states and 521 transitions. [2021-04-15 02:28:47,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:28:47,777 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:28:47,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:47,778 INFO L225 Difference]: With dead ends: 215 [2021-04-15 02:28:47,778 INFO L226 Difference]: Without dead ends: 211 [2021-04-15 02:28:47,778 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:28:47,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-04-15 02:28:47,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 129. [2021-04-15 02:28:47,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.78125) internal successors, (356), 128 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:47,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 356 transitions. [2021-04-15 02:28:47,780 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 356 transitions. Word has length 15 [2021-04-15 02:28:47,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:47,780 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 356 transitions. [2021-04-15 02:28:47,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:47,781 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 356 transitions. [2021-04-15 02:28:47,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:28:47,781 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:47,781 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:47,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-04-15 02:28:47,995 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:47,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:47,995 INFO L82 PathProgramCache]: Analyzing trace with hash -437209899, now seen corresponding path program 46 times [2021-04-15 02:28:47,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:47,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419024471] [2021-04-15 02:28:47,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:48,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419024471] [2021-04-15 02:28:48,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564044632] [2021-04-15 02:28:48,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:48,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:28:48,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:48,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:28:48,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:48,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:48,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-04-15 02:28:48,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439734018] [2021-04-15 02:28:48,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:28:48,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:48,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:28:48,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:28:48,059 INFO L87 Difference]: Start difference. First operand 129 states and 356 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:48,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:48,093 INFO L93 Difference]: Finished difference Result 166 states and 422 transitions. [2021-04-15 02:28:48,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 02:28:48,094 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:28:48,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:48,094 INFO L225 Difference]: With dead ends: 166 [2021-04-15 02:28:48,094 INFO L226 Difference]: Without dead ends: 166 [2021-04-15 02:28:48,094 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:28:48,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-04-15 02:28:48,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 135. [2021-04-15 02:28:48,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.791044776119403) internal successors, (374), 134 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:48,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 374 transitions. [2021-04-15 02:28:48,096 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 374 transitions. Word has length 15 [2021-04-15 02:28:48,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:48,097 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 374 transitions. [2021-04-15 02:28:48,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:48,097 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 374 transitions. [2021-04-15 02:28:48,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:28:48,097 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:48,097 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:48,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:48,317 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:48,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:48,317 INFO L82 PathProgramCache]: Analyzing trace with hash -618973648, now seen corresponding path program 47 times [2021-04-15 02:28:48,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:48,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49397008] [2021-04-15 02:28:48,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:48,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49397008] [2021-04-15 02:28:48,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671062110] [2021-04-15 02:28:48,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:48,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:28:48,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:48,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:28:48,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:48,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:48,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:48,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-04-15 02:28:48,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732199939] [2021-04-15 02:28:48,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:28:48,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:48,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:28:48,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:28:48,385 INFO L87 Difference]: Start difference. First operand 135 states and 374 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:48,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:48,445 INFO L93 Difference]: Finished difference Result 217 states and 530 transitions. [2021-04-15 02:28:48,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:28:48,445 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:28:48,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:48,446 INFO L225 Difference]: With dead ends: 217 [2021-04-15 02:28:48,446 INFO L226 Difference]: Without dead ends: 211 [2021-04-15 02:28:48,446 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:28:48,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-04-15 02:28:48,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 142. [2021-04-15 02:28:48,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8297872340425534) internal successors, (399), 141 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:48,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 399 transitions. [2021-04-15 02:28:48,449 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 399 transitions. Word has length 15 [2021-04-15 02:28:48,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:48,449 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 399 transitions. [2021-04-15 02:28:48,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:48,449 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 399 transitions. [2021-04-15 02:28:48,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:28:48,449 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:48,449 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:48,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:48,657 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:48,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:48,657 INFO L82 PathProgramCache]: Analyzing trace with hash 100645679, now seen corresponding path program 48 times [2021-04-15 02:28:48,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:48,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769747839] [2021-04-15 02:28:48,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:48,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:48,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769747839] [2021-04-15 02:28:48,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728968252] [2021-04-15 02:28:48,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:48,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:28:48,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:48,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:28:48,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:48,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:48,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-04-15 02:28:48,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814547399] [2021-04-15 02:28:48,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:28:48,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:48,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:28:48,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:28:48,764 INFO L87 Difference]: Start difference. First operand 142 states and 399 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:48,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:48,826 INFO L93 Difference]: Finished difference Result 184 states and 467 transitions. [2021-04-15 02:28:48,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:28:48,826 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:28:48,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:48,827 INFO L225 Difference]: With dead ends: 184 [2021-04-15 02:28:48,827 INFO L226 Difference]: Without dead ends: 184 [2021-04-15 02:28:48,827 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:28:48,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-04-15 02:28:48,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 142. [2021-04-15 02:28:48,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8297872340425534) internal successors, (399), 141 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:48,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 399 transitions. [2021-04-15 02:28:48,829 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 399 transitions. Word has length 15 [2021-04-15 02:28:48,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:48,829 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 399 transitions. [2021-04-15 02:28:48,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:48,829 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 399 transitions. [2021-04-15 02:28:48,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:28:48,830 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:48,830 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:49,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:49,044 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:49,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:49,044 INFO L82 PathProgramCache]: Analyzing trace with hash 475117940, now seen corresponding path program 49 times [2021-04-15 02:28:49,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:49,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307196001] [2021-04-15 02:28:49,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:49,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307196001] [2021-04-15 02:28:49,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130027616] [2021-04-15 02:28:49,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:49,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:28:49,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:49,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:49,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-04-15 02:28:49,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951013136] [2021-04-15 02:28:49,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:28:49,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:49,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:28:49,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:28:49,109 INFO L87 Difference]: Start difference. First operand 142 states and 399 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:49,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:49,147 INFO L93 Difference]: Finished difference Result 186 states and 481 transitions. [2021-04-15 02:28:49,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:28:49,147 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:28:49,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:49,148 INFO L225 Difference]: With dead ends: 186 [2021-04-15 02:28:49,148 INFO L226 Difference]: Without dead ends: 178 [2021-04-15 02:28:49,148 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:28:49,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-04-15 02:28:49,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 140. [2021-04-15 02:28:49,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.841726618705036) internal successors, (395), 139 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:49,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 395 transitions. [2021-04-15 02:28:49,161 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 395 transitions. Word has length 15 [2021-04-15 02:28:49,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:49,161 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 395 transitions. [2021-04-15 02:28:49,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:49,161 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 395 transitions. [2021-04-15 02:28:49,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:28:49,162 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:49,162 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:49,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-04-15 02:28:49,362 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:49,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:49,363 INFO L82 PathProgramCache]: Analyzing trace with hash -405700587, now seen corresponding path program 50 times [2021-04-15 02:28:49,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:49,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431556535] [2021-04-15 02:28:49,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:49,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431556535] [2021-04-15 02:28:49,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572835899] [2021-04-15 02:28:49,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:49,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:28:49,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:49,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:28:49,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:49,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:49,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-04-15 02:28:49,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399228369] [2021-04-15 02:28:49,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:28:49,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:49,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:28:49,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:28:49,438 INFO L87 Difference]: Start difference. First operand 140 states and 395 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:49,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:49,517 INFO L93 Difference]: Finished difference Result 189 states and 494 transitions. [2021-04-15 02:28:49,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:28:49,518 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:28:49,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:49,518 INFO L225 Difference]: With dead ends: 189 [2021-04-15 02:28:49,518 INFO L226 Difference]: Without dead ends: 189 [2021-04-15 02:28:49,518 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:28:49,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-04-15 02:28:49,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 148. [2021-04-15 02:28:49,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.8299319727891157) internal successors, (416), 147 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:49,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 416 transitions. [2021-04-15 02:28:49,521 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 416 transitions. Word has length 15 [2021-04-15 02:28:49,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:49,521 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 416 transitions. [2021-04-15 02:28:49,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:49,521 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 416 transitions. [2021-04-15 02:28:49,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:28:49,521 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:49,521 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:49,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-04-15 02:28:49,733 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:49,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:49,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1204336263, now seen corresponding path program 51 times [2021-04-15 02:28:49,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:49,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825377240] [2021-04-15 02:28:49,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:49,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825377240] [2021-04-15 02:28:49,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455807229] [2021-04-15 02:28:49,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:49,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:28:49,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:49,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:28:49,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:49,978 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:49,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:28:50,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:50,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:50,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:50,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-04-15 02:28:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:50,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:50,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 02:28:50,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439983473] [2021-04-15 02:28:50,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:28:50,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:50,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:28:50,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:28:50,012 INFO L87 Difference]: Start difference. First operand 148 states and 416 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:50,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:50,207 INFO L93 Difference]: Finished difference Result 205 states and 527 transitions. [2021-04-15 02:28:50,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:28:50,207 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:28:50,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:50,208 INFO L225 Difference]: With dead ends: 205 [2021-04-15 02:28:50,208 INFO L226 Difference]: Without dead ends: 178 [2021-04-15 02:28:50,208 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 219.8ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:28:50,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-04-15 02:28:50,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 158. [2021-04-15 02:28:50,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8343949044585988) internal successors, (445), 157 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:50,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 445 transitions. [2021-04-15 02:28:50,211 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 445 transitions. Word has length 16 [2021-04-15 02:28:50,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:50,211 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 445 transitions. [2021-04-15 02:28:50,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:50,211 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 445 transitions. [2021-04-15 02:28:50,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:28:50,211 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:50,211 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:50,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-04-15 02:28:50,417 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:50,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:50,417 INFO L82 PathProgramCache]: Analyzing trace with hash 387366859, now seen corresponding path program 52 times [2021-04-15 02:28:50,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:50,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890259883] [2021-04-15 02:28:50,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:50,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890259883] [2021-04-15 02:28:50,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284709866] [2021-04-15 02:28:50,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:50,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:28:50,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:50,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:28:50,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:50,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:50,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:28:50,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:50,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:50,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:50,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-04-15 02:28:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:50,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:50,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:28:50,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329818535] [2021-04-15 02:28:50,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:28:50,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:50,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:28:50,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:28:50,694 INFO L87 Difference]: Start difference. First operand 158 states and 445 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:50,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:50,888 INFO L93 Difference]: Finished difference Result 218 states and 567 transitions. [2021-04-15 02:28:50,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:28:50,889 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:28:50,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:50,890 INFO L225 Difference]: With dead ends: 218 [2021-04-15 02:28:50,890 INFO L226 Difference]: Without dead ends: 202 [2021-04-15 02:28:50,890 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:28:50,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-04-15 02:28:50,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 169. [2021-04-15 02:28:50,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.875) internal successors, (483), 168 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 483 transitions. [2021-04-15 02:28:50,892 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 483 transitions. Word has length 16 [2021-04-15 02:28:50,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:50,892 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 483 transitions. [2021-04-15 02:28:50,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:50,892 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 483 transitions. [2021-04-15 02:28:50,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:28:50,893 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:50,893 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:51,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-04-15 02:28:51,107 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:51,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:51,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1246241389, now seen corresponding path program 53 times [2021-04-15 02:28:51,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:51,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788136422] [2021-04-15 02:28:51,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:51,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788136422] [2021-04-15 02:28:51,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763003599] [2021-04-15 02:28:51,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:51,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:28:51,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:51,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:28:51,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:51,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:51,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:28:51,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:28:51,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:51,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:28:51,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:51,432 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 02:28:51,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:28:51,432 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-04-15 02:28:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:51,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:51,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:28:51,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898258194] [2021-04-15 02:28:51,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:28:51,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:51,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:28:51,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:28:51,456 INFO L87 Difference]: Start difference. First operand 169 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:51,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:51,614 INFO L93 Difference]: Finished difference Result 234 states and 603 transitions. [2021-04-15 02:28:51,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:28:51,614 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:28:51,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:51,615 INFO L225 Difference]: With dead ends: 234 [2021-04-15 02:28:51,615 INFO L226 Difference]: Without dead ends: 224 [2021-04-15 02:28:51,615 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 187.0ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:28:51,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-04-15 02:28:51,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 169. [2021-04-15 02:28:51,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.875) internal successors, (483), 168 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:51,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 483 transitions. [2021-04-15 02:28:51,622 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 483 transitions. Word has length 16 [2021-04-15 02:28:51,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:51,622 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 483 transitions. [2021-04-15 02:28:51,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:51,622 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 483 transitions. [2021-04-15 02:28:51,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:28:51,623 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:51,623 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:51,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:51,837 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:51,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:51,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1054238309, now seen corresponding path program 54 times [2021-04-15 02:28:51,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:51,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521008039] [2021-04-15 02:28:51,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:51,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521008039] [2021-04-15 02:28:51,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331871842] [2021-04-15 02:28:51,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:51,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:28:51,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:51,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:28:51,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:52,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:52,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:28:52,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:52,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:52,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:52,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-04-15 02:28:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:52,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:52,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:28:52,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141246379] [2021-04-15 02:28:52,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:28:52,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:52,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:28:52,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:28:52,109 INFO L87 Difference]: Start difference. First operand 169 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:52,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:52,278 INFO L93 Difference]: Finished difference Result 232 states and 635 transitions. [2021-04-15 02:28:52,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:28:52,278 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:28:52,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:52,279 INFO L225 Difference]: With dead ends: 232 [2021-04-15 02:28:52,279 INFO L226 Difference]: Without dead ends: 216 [2021-04-15 02:28:52,279 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 183.4ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:28:52,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-04-15 02:28:52,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 188. [2021-04-15 02:28:52,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.9411764705882355) internal successors, (550), 187 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:52,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 550 transitions. [2021-04-15 02:28:52,283 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 550 transitions. Word has length 16 [2021-04-15 02:28:52,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:52,283 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 550 transitions. [2021-04-15 02:28:52,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:52,283 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 550 transitions. [2021-04-15 02:28:52,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:28:52,284 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:52,284 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:52,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-04-15 02:28:52,498 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:52,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:52,499 INFO L82 PathProgramCache]: Analyzing trace with hash -195363779, now seen corresponding path program 55 times [2021-04-15 02:28:52,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:52,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454948658] [2021-04-15 02:28:52,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:52,568 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:52,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454948658] [2021-04-15 02:28:52,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805859842] [2021-04-15 02:28:52,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:52,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:28:52,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:52,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:52,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:28:52,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:28:52,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:52,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:28:52,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:52,818 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 02:28:52,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:28:52,819 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-04-15 02:28:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:52,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:52,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:28:52,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478641695] [2021-04-15 02:28:52,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:28:52,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:52,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:28:52,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:28:52,842 INFO L87 Difference]: Start difference. First operand 188 states and 550 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:53,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:53,090 INFO L93 Difference]: Finished difference Result 263 states and 691 transitions. [2021-04-15 02:28:53,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:28:53,090 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:28:53,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:53,091 INFO L225 Difference]: With dead ends: 263 [2021-04-15 02:28:53,091 INFO L226 Difference]: Without dead ends: 244 [2021-04-15 02:28:53,091 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 226.4ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:28:53,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-04-15 02:28:53,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 186. [2021-04-15 02:28:53,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.918918918918919) internal successors, (540), 185 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:53,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 540 transitions. [2021-04-15 02:28:53,109 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 540 transitions. Word has length 16 [2021-04-15 02:28:53,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:53,109 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 540 transitions. [2021-04-15 02:28:53,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:53,109 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 540 transitions. [2021-04-15 02:28:53,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:28:53,110 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:53,110 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:53,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:53,324 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:53,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:53,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1515249529, now seen corresponding path program 56 times [2021-04-15 02:28:53,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:53,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957485574] [2021-04-15 02:28:53,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:53,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:53,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957485574] [2021-04-15 02:28:53,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952947259] [2021-04-15 02:28:53,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:28:53,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:28:53,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:53,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:28:53,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:53,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:53,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:28:53,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:28:53,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:53,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:28:53,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:53,684 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 02:28:53,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:28:53,685 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-04-15 02:28:53,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:53,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:53,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:28:53,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462545770] [2021-04-15 02:28:53,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:28:53,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:53,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:28:53,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:28:53,709 INFO L87 Difference]: Start difference. First operand 186 states and 540 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:53,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:53,943 INFO L93 Difference]: Finished difference Result 229 states and 625 transitions. [2021-04-15 02:28:53,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:28:53,943 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:28:53,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:53,944 INFO L225 Difference]: With dead ends: 229 [2021-04-15 02:28:53,944 INFO L226 Difference]: Without dead ends: 219 [2021-04-15 02:28:53,944 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 235.7ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:28:53,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-04-15 02:28:53,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 187. [2021-04-15 02:28:53,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.9193548387096775) internal successors, (543), 186 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:53,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 543 transitions. [2021-04-15 02:28:53,947 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 543 transitions. Word has length 16 [2021-04-15 02:28:53,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:53,947 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 543 transitions. [2021-04-15 02:28:53,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:53,947 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 543 transitions. [2021-04-15 02:28:53,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:28:53,947 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:53,947 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:54,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:54,161 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:54,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:54,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1313032655, now seen corresponding path program 57 times [2021-04-15 02:28:54,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:54,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054782457] [2021-04-15 02:28:54,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:54,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054782457] [2021-04-15 02:28:54,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812933506] [2021-04-15 02:28:54,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:54,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:28:54,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:54,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:28:54,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:54,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:54,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:28:54,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:54,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:54,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:54,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-04-15 02:28:54,385 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:54,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:54,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-04-15 02:28:54,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524269301] [2021-04-15 02:28:54,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:28:54,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:54,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:28:54,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:28:54,386 INFO L87 Difference]: Start difference. First operand 187 states and 543 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:54,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:54,526 INFO L93 Difference]: Finished difference Result 208 states and 572 transitions. [2021-04-15 02:28:54,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:28:54,527 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:28:54,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:54,527 INFO L225 Difference]: With dead ends: 208 [2021-04-15 02:28:54,527 INFO L226 Difference]: Without dead ends: 190 [2021-04-15 02:28:54,527 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:28:54,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-04-15 02:28:54,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2021-04-15 02:28:54,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.913978494623656) internal successors, (542), 186 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:54,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 542 transitions. [2021-04-15 02:28:54,530 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 542 transitions. Word has length 16 [2021-04-15 02:28:54,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:54,530 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 542 transitions. [2021-04-15 02:28:54,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:54,530 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 542 transitions. [2021-04-15 02:28:54,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:28:54,530 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:54,531 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:54,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:54,745 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:54,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:54,745 INFO L82 PathProgramCache]: Analyzing trace with hash -762693297, now seen corresponding path program 58 times [2021-04-15 02:28:54,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:54,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841834596] [2021-04-15 02:28:54,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:54,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841834596] [2021-04-15 02:28:54,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195264197] [2021-04-15 02:28:54,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:54,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:28:54,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:54,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:28:54,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:54,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:54,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:28:54,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:28:55,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:55,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:28:55,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:55,046 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 02:28:55,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:28:55,047 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-04-15 02:28:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:55,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:55,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:28:55,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102254871] [2021-04-15 02:28:55,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:28:55,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:55,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:28:55,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:28:55,073 INFO L87 Difference]: Start difference. First operand 187 states and 542 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:55,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:55,310 INFO L93 Difference]: Finished difference Result 260 states and 675 transitions. [2021-04-15 02:28:55,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:28:55,310 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:28:55,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:55,311 INFO L225 Difference]: With dead ends: 260 [2021-04-15 02:28:55,311 INFO L226 Difference]: Without dead ends: 250 [2021-04-15 02:28:55,311 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 232.3ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:28:55,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-04-15 02:28:55,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 191. [2021-04-15 02:28:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.8842105263157896) internal successors, (548), 190 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:55,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 548 transitions. [2021-04-15 02:28:55,314 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 548 transitions. Word has length 16 [2021-04-15 02:28:55,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:55,314 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 548 transitions. [2021-04-15 02:28:55,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:55,314 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 548 transitions. [2021-04-15 02:28:55,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:28:55,314 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:55,314 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:55,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:55,525 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:55,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:55,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1500641739, now seen corresponding path program 59 times [2021-04-15 02:28:55,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:55,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379618591] [2021-04-15 02:28:55,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:55,577 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:55,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379618591] [2021-04-15 02:28:55,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482804303] [2021-04-15 02:28:55,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:28:55,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:28:55,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:55,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:28:55,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:55,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:55,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:28:55,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:55,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:55,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:55,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-04-15 02:28:55,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:55,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:55,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:28:55,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369677015] [2021-04-15 02:28:55,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:28:55,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:55,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:28:55,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:28:55,802 INFO L87 Difference]: Start difference. First operand 191 states and 548 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:56,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:56,035 INFO L93 Difference]: Finished difference Result 264 states and 729 transitions. [2021-04-15 02:28:56,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:28:56,035 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:28:56,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:56,036 INFO L225 Difference]: With dead ends: 264 [2021-04-15 02:28:56,036 INFO L226 Difference]: Without dead ends: 246 [2021-04-15 02:28:56,036 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 191.6ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:28:56,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-04-15 02:28:56,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 216. [2021-04-15 02:28:56,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.9488372093023254) internal successors, (634), 215 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:56,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 634 transitions. [2021-04-15 02:28:56,039 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 634 transitions. Word has length 16 [2021-04-15 02:28:56,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:56,039 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 634 transitions. [2021-04-15 02:28:56,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:56,039 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 634 transitions. [2021-04-15 02:28:56,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:28:56,039 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:56,040 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:56,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:56,240 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:56,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:56,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1935451027, now seen corresponding path program 60 times [2021-04-15 02:28:56,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:56,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481284584] [2021-04-15 02:28:56,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:56,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481284584] [2021-04-15 02:28:56,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643710016] [2021-04-15 02:28:56,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:56,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:28:56,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:56,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:28:56,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:56,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:56,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:28:56,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:28:56,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:56,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:28:56,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:56,527 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 02:28:56,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:28:56,528 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-04-15 02:28:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:56,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:56,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:28:56,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334994943] [2021-04-15 02:28:56,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:28:56,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:56,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:28:56,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:28:56,552 INFO L87 Difference]: Start difference. First operand 216 states and 634 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:56,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:56,926 INFO L93 Difference]: Finished difference Result 318 states and 837 transitions. [2021-04-15 02:28:56,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:28:56,926 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:28:56,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:56,927 INFO L225 Difference]: With dead ends: 318 [2021-04-15 02:28:56,927 INFO L226 Difference]: Without dead ends: 292 [2021-04-15 02:28:56,927 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 277.7ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:28:56,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-04-15 02:28:56,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 218. [2021-04-15 02:28:56,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.944700460829493) internal successors, (639), 217 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:56,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 639 transitions. [2021-04-15 02:28:56,930 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 639 transitions. Word has length 16 [2021-04-15 02:28:56,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:56,930 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 639 transitions. [2021-04-15 02:28:56,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:56,930 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 639 transitions. [2021-04-15 02:28:56,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:28:56,931 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:56,931 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:57,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-04-15 02:28:57,133 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:57,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:57,134 INFO L82 PathProgramCache]: Analyzing trace with hash -224837719, now seen corresponding path program 61 times [2021-04-15 02:28:57,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:57,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001523784] [2021-04-15 02:28:57,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:57,198 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:57,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001523784] [2021-04-15 02:28:57,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215172987] [2021-04-15 02:28:57,198 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:57,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:28:57,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:57,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:57,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:28:57,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:28:57,421 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:57,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:28:57,439 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:57,451 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 02:28:57,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:28:57,452 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-04-15 02:28:57,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:57,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:57,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 02:28:57,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139861654] [2021-04-15 02:28:57,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:28:57,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:57,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:28:57,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:28:57,474 INFO L87 Difference]: Start difference. First operand 218 states and 639 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:57,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:57,880 INFO L93 Difference]: Finished difference Result 355 states and 911 transitions. [2021-04-15 02:28:57,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:28:57,880 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:28:57,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:57,881 INFO L225 Difference]: With dead ends: 355 [2021-04-15 02:28:57,881 INFO L226 Difference]: Without dead ends: 322 [2021-04-15 02:28:57,881 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 333.2ms TimeCoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:28:57,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-04-15 02:28:57,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 210. [2021-04-15 02:28:57,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.909090909090909) internal successors, (608), 209 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:57,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 608 transitions. [2021-04-15 02:28:57,885 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 608 transitions. Word has length 16 [2021-04-15 02:28:57,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:57,885 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 608 transitions. [2021-04-15 02:28:57,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:57,885 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 608 transitions. [2021-04-15 02:28:57,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:28:57,885 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:57,885 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:58,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-04-15 02:28:58,099 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:58,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:58,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1264567277, now seen corresponding path program 62 times [2021-04-15 02:28:58,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:58,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111869136] [2021-04-15 02:28:58,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:58,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111869136] [2021-04-15 02:28:58,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732349382] [2021-04-15 02:28:58,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:58,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:28:58,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:58,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:28:58,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:58,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:58,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:28:58,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:28:58,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:58,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:28:58,410 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:58,428 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 02:28:58,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:28:58,429 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-04-15 02:28:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:58,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:58,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 02:28:58,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210900420] [2021-04-15 02:28:58,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:28:58,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:58,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:28:58,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:28:58,452 INFO L87 Difference]: Start difference. First operand 210 states and 608 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:58,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:58,736 INFO L93 Difference]: Finished difference Result 275 states and 745 transitions. [2021-04-15 02:28:58,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:28:58,736 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:28:58,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:58,737 INFO L225 Difference]: With dead ends: 275 [2021-04-15 02:28:58,737 INFO L226 Difference]: Without dead ends: 265 [2021-04-15 02:28:58,737 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 276.7ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:28:58,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-04-15 02:28:58,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 211. [2021-04-15 02:28:58,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.9095238095238094) internal successors, (611), 210 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:58,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 611 transitions. [2021-04-15 02:28:58,740 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 611 transitions. Word has length 16 [2021-04-15 02:28:58,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:58,740 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 611 transitions. [2021-04-15 02:28:58,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:58,740 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 611 transitions. [2021-04-15 02:28:58,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:28:58,741 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:58,741 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:58,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-04-15 02:28:58,955 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:58,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:58,955 INFO L82 PathProgramCache]: Analyzing trace with hash -583718215, now seen corresponding path program 63 times [2021-04-15 02:28:58,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:58,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415974735] [2021-04-15 02:28:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:58,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:59,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:59,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415974735] [2021-04-15 02:28:59,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191673637] [2021-04-15 02:28:59,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:59,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:28:59,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:59,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:28:59,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:59,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:59,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:28:59,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:59,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:59,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:59,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-04-15 02:28:59,205 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:59,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:59,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:28:59,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616483799] [2021-04-15 02:28:59,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:28:59,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:59,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:28:59,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:28:59,206 INFO L87 Difference]: Start difference. First operand 211 states and 611 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:59,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:59,352 INFO L93 Difference]: Finished difference Result 238 states and 653 transitions. [2021-04-15 02:28:59,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:28:59,352 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:28:59,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:59,353 INFO L225 Difference]: With dead ends: 238 [2021-04-15 02:28:59,353 INFO L226 Difference]: Without dead ends: 220 [2021-04-15 02:28:59,353 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 194.9ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:28:59,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-04-15 02:28:59,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 211. [2021-04-15 02:28:59,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.9047619047619047) internal successors, (610), 210 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:59,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 610 transitions. [2021-04-15 02:28:59,356 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 610 transitions. Word has length 16 [2021-04-15 02:28:59,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:59,356 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 610 transitions. [2021-04-15 02:28:59,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:59,356 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 610 transitions. [2021-04-15 02:28:59,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:28:59,357 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:59,357 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:59,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-04-15 02:28:59,571 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:59,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:59,571 INFO L82 PathProgramCache]: Analyzing trace with hash -632183593, now seen corresponding path program 64 times [2021-04-15 02:28:59,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:59,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425489136] [2021-04-15 02:28:59,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:59,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425489136] [2021-04-15 02:28:59,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508503591] [2021-04-15 02:28:59,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:59,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:28:59,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:59,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:28:59,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:59,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:59,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:28:59,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:28:59,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:59,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:28:59,873 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:59,885 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 02:28:59,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:28:59,886 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-04-15 02:28:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:59,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:59,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 02:28:59,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838264455] [2021-04-15 02:28:59,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:28:59,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:59,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:28:59,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:28:59,909 INFO L87 Difference]: Start difference. First operand 211 states and 610 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:00,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:00,267 INFO L93 Difference]: Finished difference Result 298 states and 793 transitions. [2021-04-15 02:29:00,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:29:00,267 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:00,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:00,268 INFO L225 Difference]: With dead ends: 298 [2021-04-15 02:29:00,268 INFO L226 Difference]: Without dead ends: 288 [2021-04-15 02:29:00,269 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 373.4ms TimeCoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:29:00,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-04-15 02:29:00,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 213. [2021-04-15 02:29:00,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.910377358490566) internal successors, (617), 212 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:00,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 617 transitions. [2021-04-15 02:29:00,272 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 617 transitions. Word has length 16 [2021-04-15 02:29:00,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:00,272 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 617 transitions. [2021-04-15 02:29:00,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:00,272 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 617 transitions. [2021-04-15 02:29:00,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:00,272 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:00,272 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:00,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-04-15 02:29:00,487 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:00,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:00,487 INFO L82 PathProgramCache]: Analyzing trace with hash -902455397, now seen corresponding path program 65 times [2021-04-15 02:29:00,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:00,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252786477] [2021-04-15 02:29:00,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:00,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252786477] [2021-04-15 02:29:00,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822364868] [2021-04-15 02:29:00,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:00,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:29:00,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:00,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:29:00,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:00,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:00,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:00,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:00,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:00,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:00,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-04-15 02:29:00,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:00,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:00,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:29:00,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563591764] [2021-04-15 02:29:00,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:00,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:00,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:00,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:00,743 INFO L87 Difference]: Start difference. First operand 213 states and 617 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:00,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:00,938 INFO L93 Difference]: Finished difference Result 275 states and 774 transitions. [2021-04-15 02:29:00,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:00,938 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:00,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:00,939 INFO L225 Difference]: With dead ends: 275 [2021-04-15 02:29:00,939 INFO L226 Difference]: Without dead ends: 259 [2021-04-15 02:29:00,939 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 179.2ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:29:00,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-04-15 02:29:00,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 241. [2021-04-15 02:29:00,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.9625) internal successors, (711), 240 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:00,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 711 transitions. [2021-04-15 02:29:00,942 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 711 transitions. Word has length 16 [2021-04-15 02:29:00,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:00,942 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 711 transitions. [2021-04-15 02:29:00,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:00,942 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 711 transitions. [2021-04-15 02:29:00,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:00,943 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:00,943 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:01,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-04-15 02:29:01,157 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:01,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:01,157 INFO L82 PathProgramCache]: Analyzing trace with hash -43580867, now seen corresponding path program 66 times [2021-04-15 02:29:01,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:01,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260492387] [2021-04-15 02:29:01,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:01,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:01,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260492387] [2021-04-15 02:29:01,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389577315] [2021-04-15 02:29:01,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:29:01,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:29:01,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:01,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:29:01,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:01,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:01,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:29:01,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:01,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:01,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:01,444 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:01,457 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 02:29:01,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:01,458 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-04-15 02:29:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:01,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:01,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:29:01,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292249692] [2021-04-15 02:29:01,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:01,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:01,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:01,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:01,481 INFO L87 Difference]: Start difference. First operand 241 states and 711 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:01,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:01,927 INFO L93 Difference]: Finished difference Result 332 states and 894 transitions. [2021-04-15 02:29:01,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:29:01,927 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:01,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:01,928 INFO L225 Difference]: With dead ends: 332 [2021-04-15 02:29:01,928 INFO L226 Difference]: Without dead ends: 308 [2021-04-15 02:29:01,929 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 337.6ms TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:29:01,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-04-15 02:29:01,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 243. [2021-04-15 02:29:01,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.9669421487603307) internal successors, (718), 242 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:01,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 718 transitions. [2021-04-15 02:29:01,932 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 718 transitions. Word has length 16 [2021-04-15 02:29:01,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:01,932 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 718 transitions. [2021-04-15 02:29:01,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:01,932 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 718 transitions. [2021-04-15 02:29:01,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:01,932 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:01,932 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:02,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-04-15 02:29:02,147 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:02,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:02,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1667032441, now seen corresponding path program 67 times [2021-04-15 02:29:02,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:02,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793695637] [2021-04-15 02:29:02,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:02,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:02,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793695637] [2021-04-15 02:29:02,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959012033] [2021-04-15 02:29:02,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:02,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:02,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:29:02,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:02,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:02,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:29:02,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:02,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:02,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:02,440 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:02,454 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 02:29:02,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:02,455 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-04-15 02:29:02,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:02,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:02,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:29:02,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290430352] [2021-04-15 02:29:02,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:02,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:02,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:02,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:02,481 INFO L87 Difference]: Start difference. First operand 243 states and 718 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:02,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:02,850 INFO L93 Difference]: Finished difference Result 325 states and 881 transitions. [2021-04-15 02:29:02,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:29:02,850 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:02,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:02,851 INFO L225 Difference]: With dead ends: 325 [2021-04-15 02:29:02,851 INFO L226 Difference]: Without dead ends: 315 [2021-04-15 02:29:02,851 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 309.5ms TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:29:02,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-04-15 02:29:02,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 255. [2021-04-15 02:29:02,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.9763779527559056) internal successors, (756), 254 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:02,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 756 transitions. [2021-04-15 02:29:02,855 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 756 transitions. Word has length 16 [2021-04-15 02:29:02,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:02,855 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 756 transitions. [2021-04-15 02:29:02,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:02,855 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 756 transitions. [2021-04-15 02:29:02,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:02,855 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:02,855 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:03,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:03,070 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:03,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:03,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1138529859, now seen corresponding path program 68 times [2021-04-15 02:29:03,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:03,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631043133] [2021-04-15 02:29:03,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:03,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631043133] [2021-04-15 02:29:03,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551161336] [2021-04-15 02:29:03,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:03,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:03,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:03,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:29:03,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:03,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:03,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:29:03,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:03,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:03,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:03,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:03,388 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 02:29:03,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:03,388 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-04-15 02:29:03,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:03,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:03,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 02:29:03,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958251299] [2021-04-15 02:29:03,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:29:03,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:03,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:29:03,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:03,412 INFO L87 Difference]: Start difference. First operand 255 states and 756 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:03,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:03,871 INFO L93 Difference]: Finished difference Result 360 states and 966 transitions. [2021-04-15 02:29:03,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:29:03,871 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:03,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:03,872 INFO L225 Difference]: With dead ends: 360 [2021-04-15 02:29:03,872 INFO L226 Difference]: Without dead ends: 331 [2021-04-15 02:29:03,873 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 419.0ms TimeCoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 02:29:03,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-04-15 02:29:03,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 249. [2021-04-15 02:29:03,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.967741935483871) internal successors, (736), 248 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:03,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 736 transitions. [2021-04-15 02:29:03,876 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 736 transitions. Word has length 16 [2021-04-15 02:29:03,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:03,876 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 736 transitions. [2021-04-15 02:29:03,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:03,876 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 736 transitions. [2021-04-15 02:29:03,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:03,876 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:03,876 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:04,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable617 [2021-04-15 02:29:04,077 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:04,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:04,077 INFO L82 PathProgramCache]: Analyzing trace with hash 2083352057, now seen corresponding path program 69 times [2021-04-15 02:29:04,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:04,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898198125] [2021-04-15 02:29:04,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:04,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898198125] [2021-04-15 02:29:04,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136637061] [2021-04-15 02:29:04,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:04,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:29:04,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:04,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:29:04,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:04,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:04,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:29:04,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:04,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:04,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:04,409 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:04,422 INFO L628 ElimStorePlain]: treesize reduction 17, result has 46.9 percent of original size [2021-04-15 02:29:04,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:04,423 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-04-15 02:29:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:04,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:04,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 02:29:04,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412879574] [2021-04-15 02:29:04,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:29:04,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:04,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:29:04,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:04,446 INFO L87 Difference]: Start difference. First operand 249 states and 736 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:04,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:04,770 INFO L93 Difference]: Finished difference Result 305 states and 859 transitions. [2021-04-15 02:29:04,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:29:04,770 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:04,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:04,771 INFO L225 Difference]: With dead ends: 305 [2021-04-15 02:29:04,771 INFO L226 Difference]: Without dead ends: 300 [2021-04-15 02:29:04,771 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 326.8ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:29:04,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-04-15 02:29:04,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 250. [2021-04-15 02:29:04,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.967871485943775) internal successors, (739), 249 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:04,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 739 transitions. [2021-04-15 02:29:04,774 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 739 transitions. Word has length 16 [2021-04-15 02:29:04,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:04,774 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 739 transitions. [2021-04-15 02:29:04,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:04,775 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 739 transitions. [2021-04-15 02:29:04,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:04,775 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:04,775 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:04,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable654,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:04,989 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:04,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:04,989 INFO L82 PathProgramCache]: Analyzing trace with hash 746546959, now seen corresponding path program 70 times [2021-04-15 02:29:04,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:04,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852572620] [2021-04-15 02:29:04,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:05,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852572620] [2021-04-15 02:29:05,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120400225] [2021-04-15 02:29:05,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:05,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:05,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:05,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:29:05,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:05,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:05,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:05,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:05,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:05,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:05,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-04-15 02:29:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:05,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:05,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 02:29:05,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896368257] [2021-04-15 02:29:05,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:29:05,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:05,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:29:05,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:05,251 INFO L87 Difference]: Start difference. First operand 250 states and 739 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:05,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:05,463 INFO L93 Difference]: Finished difference Result 285 states and 797 transitions. [2021-04-15 02:29:05,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:29:05,463 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:05,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:05,464 INFO L225 Difference]: With dead ends: 285 [2021-04-15 02:29:05,464 INFO L226 Difference]: Without dead ends: 267 [2021-04-15 02:29:05,465 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:29:05,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-04-15 02:29:05,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 250. [2021-04-15 02:29:05,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.959839357429719) internal successors, (737), 249 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:05,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 737 transitions. [2021-04-15 02:29:05,468 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 737 transitions. Word has length 16 [2021-04-15 02:29:05,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:05,468 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 737 transitions. [2021-04-15 02:29:05,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:05,468 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 737 transitions. [2021-04-15 02:29:05,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:05,468 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:05,468 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:05,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-04-15 02:29:05,672 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:05,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:05,673 INFO L82 PathProgramCache]: Analyzing trace with hash -881350065, now seen corresponding path program 71 times [2021-04-15 02:29:05,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:05,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501517021] [2021-04-15 02:29:05,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:05,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501517021] [2021-04-15 02:29:05,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790499358] [2021-04-15 02:29:05,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:05,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:29:05,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:05,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:29:05,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:05,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:05,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:29:05,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:05,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:05,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:05,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:06,004 INFO L628 ElimStorePlain]: treesize reduction 17, result has 46.9 percent of original size [2021-04-15 02:29:06,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:06,005 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-04-15 02:29:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:06,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:06,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 02:29:06,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281293032] [2021-04-15 02:29:06,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:29:06,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:06,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:29:06,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:06,031 INFO L87 Difference]: Start difference. First operand 250 states and 737 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:06,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:06,476 INFO L93 Difference]: Finished difference Result 335 states and 919 transitions. [2021-04-15 02:29:06,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:29:06,476 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:06,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:06,477 INFO L225 Difference]: With dead ends: 335 [2021-04-15 02:29:06,477 INFO L226 Difference]: Without dead ends: 325 [2021-04-15 02:29:06,477 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 433.5ms TimeCoverageRelationStatistics Valid=197, Invalid=1063, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 02:29:06,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-04-15 02:29:06,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 250. [2021-04-15 02:29:06,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.959839357429719) internal successors, (737), 249 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:06,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 737 transitions. [2021-04-15 02:29:06,480 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 737 transitions. Word has length 16 [2021-04-15 02:29:06,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:06,480 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 737 transitions. [2021-04-15 02:29:06,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:06,481 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 737 transitions. [2021-04-15 02:29:06,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:06,481 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:06,481 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:06,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable712,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:06,685 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:06,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:06,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1910944715, now seen corresponding path program 72 times [2021-04-15 02:29:06,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:06,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901647916] [2021-04-15 02:29:06,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:06,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901647916] [2021-04-15 02:29:06,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142075327] [2021-04-15 02:29:06,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:06,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:29:06,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:06,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:29:06,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:06,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:06,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:06,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:06,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:06,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:06,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-04-15 02:29:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:06,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:06,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:29:06,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524650540] [2021-04-15 02:29:06,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:06,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:06,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:06,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:06,927 INFO L87 Difference]: Start difference. First operand 250 states and 737 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:07,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:07,115 INFO L93 Difference]: Finished difference Result 306 states and 878 transitions. [2021-04-15 02:29:07,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:07,116 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:07,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:07,117 INFO L225 Difference]: With dead ends: 306 [2021-04-15 02:29:07,117 INFO L226 Difference]: Without dead ends: 292 [2021-04-15 02:29:07,117 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 171.8ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:29:07,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-04-15 02:29:07,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 277. [2021-04-15 02:29:07,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 3.0) internal successors, (828), 276 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:07,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 828 transitions. [2021-04-15 02:29:07,120 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 828 transitions. Word has length 16 [2021-04-15 02:29:07,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:07,120 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 828 transitions. [2021-04-15 02:29:07,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:07,120 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 828 transitions. [2021-04-15 02:29:07,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:07,121 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:07,121 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:07,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable749,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:07,335 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:07,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:07,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1525148051, now seen corresponding path program 73 times [2021-04-15 02:29:07,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:07,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026975720] [2021-04-15 02:29:07,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:07,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026975720] [2021-04-15 02:29:07,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055639562] [2021-04-15 02:29:07,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:07,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:29:07,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:07,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:07,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:29:07,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:07,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:07,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:07,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:07,675 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 02:29:07,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:07,675 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-04-15 02:29:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:07,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:07,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:29:07,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837384792] [2021-04-15 02:29:07,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:07,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:07,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:07,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:07,699 INFO L87 Difference]: Start difference. First operand 277 states and 828 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:08,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:08,177 INFO L93 Difference]: Finished difference Result 356 states and 998 transitions. [2021-04-15 02:29:08,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:29:08,178 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:08,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:08,179 INFO L225 Difference]: With dead ends: 356 [2021-04-15 02:29:08,179 INFO L226 Difference]: Without dead ends: 346 [2021-04-15 02:29:08,179 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 387.5ms TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:29:08,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-04-15 02:29:08,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 279. [2021-04-15 02:29:08,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.0071942446043165) internal successors, (836), 278 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:08,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 836 transitions. [2021-04-15 02:29:08,183 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 836 transitions. Word has length 16 [2021-04-15 02:29:08,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:08,183 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 836 transitions. [2021-04-15 02:29:08,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:08,183 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 836 transitions. [2021-04-15 02:29:08,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:08,183 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:08,183 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:08,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-04-15 02:29:08,384 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:08,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:08,384 INFO L82 PathProgramCache]: Analyzing trace with hash 185465257, now seen corresponding path program 74 times [2021-04-15 02:29:08,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:08,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940048419] [2021-04-15 02:29:08,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:08,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940048419] [2021-04-15 02:29:08,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223310468] [2021-04-15 02:29:08,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:08,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:08,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:08,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:29:08,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:08,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:08,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:29:08,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:08,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:08,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:08,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:08,715 INFO L628 ElimStorePlain]: treesize reduction 17, result has 46.9 percent of original size [2021-04-15 02:29:08,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:08,715 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-04-15 02:29:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:08,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:08,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:29:08,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048827452] [2021-04-15 02:29:08,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:08,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:08,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:08,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:08,738 INFO L87 Difference]: Start difference. First operand 279 states and 836 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:09,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:09,155 INFO L93 Difference]: Finished difference Result 370 states and 1018 transitions. [2021-04-15 02:29:09,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:29:09,155 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:09,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:09,156 INFO L225 Difference]: With dead ends: 370 [2021-04-15 02:29:09,156 INFO L226 Difference]: Without dead ends: 360 [2021-04-15 02:29:09,157 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 348.3ms TimeCoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:29:09,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-04-15 02:29:09,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 293. [2021-04-15 02:29:09,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0205479452054793) internal successors, (882), 292 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:09,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 882 transitions. [2021-04-15 02:29:09,160 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 882 transitions. Word has length 16 [2021-04-15 02:29:09,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:09,160 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 882 transitions. [2021-04-15 02:29:09,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:09,160 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 882 transitions. [2021-04-15 02:29:09,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:09,161 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:09,161 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:09,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable808,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:09,361 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:09,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:09,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1674870253, now seen corresponding path program 75 times [2021-04-15 02:29:09,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:09,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706389276] [2021-04-15 02:29:09,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:09,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706389276] [2021-04-15 02:29:09,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386784660] [2021-04-15 02:29:09,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:09,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:29:09,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:09,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:29:09,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:09,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:09,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:29:09,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:09,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:09,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:09,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:09,675 INFO L628 ElimStorePlain]: treesize reduction 17, result has 46.9 percent of original size [2021-04-15 02:29:09,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:09,676 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-04-15 02:29:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:09,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:09,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:29:09,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942832156] [2021-04-15 02:29:09,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:09,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:09,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:09,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:09,702 INFO L87 Difference]: Start difference. First operand 293 states and 882 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:10,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:10,126 INFO L93 Difference]: Finished difference Result 377 states and 1037 transitions. [2021-04-15 02:29:10,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:29:10,126 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:10,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:10,127 INFO L225 Difference]: With dead ends: 377 [2021-04-15 02:29:10,127 INFO L226 Difference]: Without dead ends: 362 [2021-04-15 02:29:10,127 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 376.7ms TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:29:10,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-04-15 02:29:10,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 298. [2021-04-15 02:29:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.0134680134680134) internal successors, (895), 297 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 895 transitions. [2021-04-15 02:29:10,131 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 895 transitions. Word has length 16 [2021-04-15 02:29:10,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:10,131 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 895 transitions. [2021-04-15 02:29:10,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:10,131 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 895 transitions. [2021-04-15 02:29:10,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:10,131 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:10,132 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:10,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable844,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:10,342 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:10,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:10,343 INFO L82 PathProgramCache]: Analyzing trace with hash 601784873, now seen corresponding path program 76 times [2021-04-15 02:29:10,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:10,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911255043] [2021-04-15 02:29:10,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:10,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911255043] [2021-04-15 02:29:10,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974045707] [2021-04-15 02:29:10,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:10,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:10,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:10,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:29:10,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:10,576 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:10,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:29:10,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:10,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:10,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:10,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:10,694 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 02:29:10,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:10,695 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-04-15 02:29:10,717 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:10,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:10,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 02:29:10,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065454693] [2021-04-15 02:29:10,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:29:10,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:10,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:29:10,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:10,718 INFO L87 Difference]: Start difference. First operand 298 states and 895 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:11,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:11,216 INFO L93 Difference]: Finished difference Result 410 states and 1106 transitions. [2021-04-15 02:29:11,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:29:11,216 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:11,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:11,217 INFO L225 Difference]: With dead ends: 410 [2021-04-15 02:29:11,218 INFO L226 Difference]: Without dead ends: 395 [2021-04-15 02:29:11,218 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 479.5ms TimeCoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:29:11,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-04-15 02:29:11,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 297. [2021-04-15 02:29:11,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.027027027027027) internal successors, (896), 296 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:11,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 896 transitions. [2021-04-15 02:29:11,222 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 896 transitions. Word has length 16 [2021-04-15 02:29:11,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:11,222 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 896 transitions. [2021-04-15 02:29:11,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:11,222 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 896 transitions. [2021-04-15 02:29:11,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:11,222 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:11,222 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:11,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable887 [2021-04-15 02:29:11,423 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:11,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:11,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1695876461, now seen corresponding path program 77 times [2021-04-15 02:29:11,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:11,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610059673] [2021-04-15 02:29:11,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:11,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610059673] [2021-04-15 02:29:11,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446114248] [2021-04-15 02:29:11,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:11,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:29:11,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:11,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 02:29:11,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:11,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:11,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:29:11,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:11,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:11,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:11,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:11,746 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 02:29:11,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:11,747 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-04-15 02:29:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:11,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:11,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 02:29:11,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281090755] [2021-04-15 02:29:11,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:29:11,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:11,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:29:11,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:11,771 INFO L87 Difference]: Start difference. First operand 297 states and 896 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:12,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:12,173 INFO L93 Difference]: Finished difference Result 367 states and 1051 transitions. [2021-04-15 02:29:12,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:29:12,173 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:12,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:12,175 INFO L225 Difference]: With dead ends: 367 [2021-04-15 02:29:12,175 INFO L226 Difference]: Without dead ends: 362 [2021-04-15 02:29:12,175 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 372.0ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:29:12,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-04-15 02:29:12,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 299. [2021-04-15 02:29:12,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0167785234899327) internal successors, (899), 298 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:12,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 899 transitions. [2021-04-15 02:29:12,178 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 899 transitions. Word has length 16 [2021-04-15 02:29:12,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:12,178 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 899 transitions. [2021-04-15 02:29:12,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:12,179 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 899 transitions. [2021-04-15 02:29:12,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:12,179 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:12,179 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:12,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable929,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:12,380 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:12,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:12,380 INFO L82 PathProgramCache]: Analyzing trace with hash 576133811, now seen corresponding path program 78 times [2021-04-15 02:29:12,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:12,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260668171] [2021-04-15 02:29:12,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:12,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260668171] [2021-04-15 02:29:12,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864569891] [2021-04-15 02:29:12,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:12,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:29:12,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:12,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:12,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:12,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:12,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:12,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:12,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:12,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:12,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:12,686 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:12,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:12,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 02:29:12,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471034294] [2021-04-15 02:29:12,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:29:12,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:12,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:29:12,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:12,687 INFO L87 Difference]: Start difference. First operand 299 states and 899 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:12,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:12,998 INFO L93 Difference]: Finished difference Result 348 states and 996 transitions. [2021-04-15 02:29:12,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:29:12,998 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:12,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:12,999 INFO L225 Difference]: With dead ends: 348 [2021-04-15 02:29:12,999 INFO L226 Difference]: Without dead ends: 337 [2021-04-15 02:29:13,000 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 255.9ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:29:13,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-04-15 02:29:13,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 304. [2021-04-15 02:29:13,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0) internal successors, (909), 303 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:13,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 909 transitions. [2021-04-15 02:29:13,003 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 909 transitions. Word has length 17 [2021-04-15 02:29:13,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:13,003 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 909 transitions. [2021-04-15 02:29:13,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:13,003 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 909 transitions. [2021-04-15 02:29:13,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:13,004 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:13,004 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:13,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable974 [2021-04-15 02:29:13,204 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:13,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:13,205 INFO L82 PathProgramCache]: Analyzing trace with hash 726231765, now seen corresponding path program 79 times [2021-04-15 02:29:13,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:13,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105792906] [2021-04-15 02:29:13,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:13,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105792906] [2021-04-15 02:29:13,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37651374] [2021-04-15 02:29:13,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:13,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:13,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:13,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:13,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:13,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:13,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:13,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:13,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:13,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:13,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:29:13,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737032348] [2021-04-15 02:29:13,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:13,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:13,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:13,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:13,489 INFO L87 Difference]: Start difference. First operand 304 states and 909 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:13,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:13,676 INFO L93 Difference]: Finished difference Result 394 states and 1062 transitions. [2021-04-15 02:29:13,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:13,677 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:13,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:13,678 INFO L225 Difference]: With dead ends: 394 [2021-04-15 02:29:13,678 INFO L226 Difference]: Without dead ends: 385 [2021-04-15 02:29:13,678 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 192.4ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:29:13,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-04-15 02:29:13,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 306. [2021-04-15 02:29:13,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.0) internal successors, (915), 305 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:13,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 915 transitions. [2021-04-15 02:29:13,682 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 915 transitions. Word has length 17 [2021-04-15 02:29:13,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:13,682 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 915 transitions. [2021-04-15 02:29:13,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:13,682 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 915 transitions. [2021-04-15 02:29:13,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:13,683 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:13,683 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:13,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1003 [2021-04-15 02:29:13,884 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:13,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:13,884 INFO L82 PathProgramCache]: Analyzing trace with hash -999247693, now seen corresponding path program 80 times [2021-04-15 02:29:13,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:13,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754042817] [2021-04-15 02:29:13,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:13,952 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:13,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754042817] [2021-04-15 02:29:13,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299706778] [2021-04-15 02:29:13,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:13,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:13,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:13,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:13,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:14,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:14,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:14,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:14,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:14,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:14,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:14,165 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:14,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:14,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:29:14,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166218103] [2021-04-15 02:29:14,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:14,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:14,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:14,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:14,166 INFO L87 Difference]: Start difference. First operand 306 states and 915 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:14,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:14,478 INFO L93 Difference]: Finished difference Result 393 states and 1076 transitions. [2021-04-15 02:29:14,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:29:14,478 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:14,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:14,479 INFO L225 Difference]: With dead ends: 393 [2021-04-15 02:29:14,479 INFO L226 Difference]: Without dead ends: 388 [2021-04-15 02:29:14,479 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 206.0ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:29:14,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-04-15 02:29:14,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 306. [2021-04-15 02:29:14,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.0) internal successors, (915), 305 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:14,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 915 transitions. [2021-04-15 02:29:14,483 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 915 transitions. Word has length 17 [2021-04-15 02:29:14,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:14,483 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 915 transitions. [2021-04-15 02:29:14,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:14,483 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 915 transitions. [2021-04-15 02:29:14,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:14,484 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:14,484 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:14,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1026 [2021-04-15 02:29:14,684 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:14,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:14,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1659695474, now seen corresponding path program 81 times [2021-04-15 02:29:14,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:14,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216117186] [2021-04-15 02:29:14,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:14,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216117186] [2021-04-15 02:29:14,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813150820] [2021-04-15 02:29:14,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:14,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:29:14,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:14,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:14,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:14,755 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:14,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:14,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:29:14,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395864373] [2021-04-15 02:29:14,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:14,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:14,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:14,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:14,756 INFO L87 Difference]: Start difference. First operand 306 states and 915 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:14,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:14,793 INFO L93 Difference]: Finished difference Result 469 states and 1200 transitions. [2021-04-15 02:29:14,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:29:14,794 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:14,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:14,795 INFO L225 Difference]: With dead ends: 469 [2021-04-15 02:29:14,795 INFO L226 Difference]: Without dead ends: 469 [2021-04-15 02:29:14,795 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:14,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-04-15 02:29:14,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 312. [2021-04-15 02:29:14,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.0160771704180065) internal successors, (938), 311 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:14,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 938 transitions. [2021-04-15 02:29:14,799 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 938 transitions. Word has length 17 [2021-04-15 02:29:14,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:14,800 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 938 transitions. [2021-04-15 02:29:14,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:14,800 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 938 transitions. [2021-04-15 02:29:14,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:14,800 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:14,800 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:15,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1057 [2021-04-15 02:29:15,001 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:15,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:15,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1013855483, now seen corresponding path program 82 times [2021-04-15 02:29:15,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:15,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519781967] [2021-04-15 02:29:15,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:15,056 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:15,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519781967] [2021-04-15 02:29:15,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478268374] [2021-04-15 02:29:15,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:15,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:15,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:15,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:15,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:15,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:15,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:15,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:15,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:15,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:15,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:15,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:15,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:29:15,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888911648] [2021-04-15 02:29:15,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:15,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:15,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:15,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:15,289 INFO L87 Difference]: Start difference. First operand 312 states and 938 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:15,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:15,512 INFO L93 Difference]: Finished difference Result 389 states and 1080 transitions. [2021-04-15 02:29:15,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:15,512 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:15,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:15,513 INFO L225 Difference]: With dead ends: 389 [2021-04-15 02:29:15,513 INFO L226 Difference]: Without dead ends: 384 [2021-04-15 02:29:15,513 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 193.1ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:29:15,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-04-15 02:29:15,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 314. [2021-04-15 02:29:15,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.022364217252396) internal successors, (946), 313 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:15,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 946 transitions. [2021-04-15 02:29:15,517 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 946 transitions. Word has length 17 [2021-04-15 02:29:15,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:15,517 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 946 transitions. [2021-04-15 02:29:15,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:15,517 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 946 transitions. [2021-04-15 02:29:15,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:15,518 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:15,518 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:15,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1058 [2021-04-15 02:29:15,732 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:15,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:15,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1555632355, now seen corresponding path program 83 times [2021-04-15 02:29:15,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:15,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367044275] [2021-04-15 02:29:15,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:15,784 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:15,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367044275] [2021-04-15 02:29:15,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954767651] [2021-04-15 02:29:15,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:15,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:29:15,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:15,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:15,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:15,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:15,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:16,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:16,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:16,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:16,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:16,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:16,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:29:16,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597792924] [2021-04-15 02:29:16,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:16,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:16,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:16,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:16,026 INFO L87 Difference]: Start difference. First operand 314 states and 946 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:16,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:16,277 INFO L93 Difference]: Finished difference Result 398 states and 1096 transitions. [2021-04-15 02:29:16,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:29:16,278 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:16,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:16,279 INFO L225 Difference]: With dead ends: 398 [2021-04-15 02:29:16,279 INFO L226 Difference]: Without dead ends: 389 [2021-04-15 02:29:16,279 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 191.3ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:29:16,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-04-15 02:29:16,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 316. [2021-04-15 02:29:16,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.015873015873016) internal successors, (950), 315 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:16,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 950 transitions. [2021-04-15 02:29:16,283 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 950 transitions. Word has length 17 [2021-04-15 02:29:16,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:16,283 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 950 transitions. [2021-04-15 02:29:16,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:16,283 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 950 transitions. [2021-04-15 02:29:16,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:16,284 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:16,284 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:16,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1084,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:16,499 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:16,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:16,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1249929945, now seen corresponding path program 84 times [2021-04-15 02:29:16,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:16,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18378231] [2021-04-15 02:29:16,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:16,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:16,553 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:16,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18378231] [2021-04-15 02:29:16,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097789206] [2021-04-15 02:29:16,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:16,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:29:16,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:16,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:16,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:16,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:16,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:16,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:16,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:16,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:16,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:16,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:16,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:29:16,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354566983] [2021-04-15 02:29:16,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:16,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:16,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:16,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:16,777 INFO L87 Difference]: Start difference. First operand 316 states and 950 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:16,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:16,957 INFO L93 Difference]: Finished difference Result 377 states and 1066 transitions. [2021-04-15 02:29:16,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:29:16,957 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:16,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:16,959 INFO L225 Difference]: With dead ends: 377 [2021-04-15 02:29:16,959 INFO L226 Difference]: Without dead ends: 372 [2021-04-15 02:29:16,959 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 192.3ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:29:16,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-04-15 02:29:16,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 316. [2021-04-15 02:29:16,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.015873015873016) internal successors, (950), 315 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:16,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 950 transitions. [2021-04-15 02:29:16,962 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 950 transitions. Word has length 17 [2021-04-15 02:29:16,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:16,962 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 950 transitions. [2021-04-15 02:29:16,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:16,963 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 950 transitions. [2021-04-15 02:29:16,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:16,963 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:16,963 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:17,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1117,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:17,173 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:17,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:17,173 INFO L82 PathProgramCache]: Analyzing trace with hash -2141251576, now seen corresponding path program 85 times [2021-04-15 02:29:17,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:17,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617257547] [2021-04-15 02:29:17,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:17,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617257547] [2021-04-15 02:29:17,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362875763] [2021-04-15 02:29:17,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:17,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:17,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:17,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:17,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:29:17,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055762168] [2021-04-15 02:29:17,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:17,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:17,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:17,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:17,248 INFO L87 Difference]: Start difference. First operand 316 states and 950 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:17,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:17,308 INFO L93 Difference]: Finished difference Result 509 states and 1289 transitions. [2021-04-15 02:29:17,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:29:17,308 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:17,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:17,310 INFO L225 Difference]: With dead ends: 509 [2021-04-15 02:29:17,310 INFO L226 Difference]: Without dead ends: 509 [2021-04-15 02:29:17,310 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:29:17,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-04-15 02:29:17,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 312. [2021-04-15 02:29:17,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.012861736334405) internal successors, (937), 311 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:17,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 937 transitions. [2021-04-15 02:29:17,314 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 937 transitions. Word has length 17 [2021-04-15 02:29:17,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:17,314 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 937 transitions. [2021-04-15 02:29:17,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:17,314 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 937 transitions. [2021-04-15 02:29:17,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:17,315 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:17,315 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:17,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1148,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:17,515 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:17,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:17,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1196751859, now seen corresponding path program 86 times [2021-04-15 02:29:17,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:17,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230920843] [2021-04-15 02:29:17,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:17,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:17,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230920843] [2021-04-15 02:29:17,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908777513] [2021-04-15 02:29:17,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:17,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:17,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:17,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:17,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:17,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:17,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:17,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:17,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:17,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:17,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:17,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:17,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-04-15 02:29:17,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154106732] [2021-04-15 02:29:17,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:17,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:17,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:17,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:17,791 INFO L87 Difference]: Start difference. First operand 312 states and 937 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:17,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:17,969 INFO L93 Difference]: Finished difference Result 345 states and 992 transitions. [2021-04-15 02:29:17,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:29:17,969 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:17,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:17,971 INFO L225 Difference]: With dead ends: 345 [2021-04-15 02:29:17,971 INFO L226 Difference]: Without dead ends: 321 [2021-04-15 02:29:17,971 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 198.2ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:29:17,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-04-15 02:29:17,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 313. [2021-04-15 02:29:17,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.0096153846153846) internal successors, (939), 312 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:17,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 939 transitions. [2021-04-15 02:29:17,974 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 939 transitions. Word has length 17 [2021-04-15 02:29:17,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:17,974 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 939 transitions. [2021-04-15 02:29:17,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:17,974 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 939 transitions. [2021-04-15 02:29:17,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:17,975 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:17,975 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:18,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1149 [2021-04-15 02:29:18,181 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:18,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:18,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1148286481, now seen corresponding path program 87 times [2021-04-15 02:29:18,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:18,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584835089] [2021-04-15 02:29:18,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:18,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584835089] [2021-04-15 02:29:18,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532065330] [2021-04-15 02:29:18,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:18,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:29:18,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:18,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:18,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:18,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:18,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:18,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:18,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:18,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:18,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:18,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:18,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:29:18,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100598722] [2021-04-15 02:29:18,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:18,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:18,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:18,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:18,467 INFO L87 Difference]: Start difference. First operand 313 states and 939 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:18,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:18,703 INFO L93 Difference]: Finished difference Result 386 states and 1054 transitions. [2021-04-15 02:29:18,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:29:18,703 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:18,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:18,704 INFO L225 Difference]: With dead ends: 386 [2021-04-15 02:29:18,704 INFO L226 Difference]: Without dead ends: 363 [2021-04-15 02:29:18,704 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 217.9ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:29:18,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-04-15 02:29:18,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 313. [2021-04-15 02:29:18,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.996794871794872) internal successors, (935), 312 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:18,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 935 transitions. [2021-04-15 02:29:18,708 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 935 transitions. Word has length 17 [2021-04-15 02:29:18,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:18,708 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 935 transitions. [2021-04-15 02:29:18,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:18,708 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 935 transitions. [2021-04-15 02:29:18,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:18,708 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:18,709 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:18,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1176 [2021-04-15 02:29:18,909 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:18,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:18,909 INFO L82 PathProgramCache]: Analyzing trace with hash 878014677, now seen corresponding path program 88 times [2021-04-15 02:29:18,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:18,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859893831] [2021-04-15 02:29:18,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:18,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859893831] [2021-04-15 02:29:18,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581317022] [2021-04-15 02:29:18,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:18,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:18,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:18,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:18,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:19,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:19,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:19,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:19,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:19,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:19,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:19,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:19,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:29:19,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186033897] [2021-04-15 02:29:19,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:19,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:19,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:19,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:19,172 INFO L87 Difference]: Start difference. First operand 313 states and 935 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:19,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:19,383 INFO L93 Difference]: Finished difference Result 367 states and 1032 transitions. [2021-04-15 02:29:19,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:29:19,384 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:19,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:19,385 INFO L225 Difference]: With dead ends: 367 [2021-04-15 02:29:19,385 INFO L226 Difference]: Without dead ends: 358 [2021-04-15 02:29:19,385 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 195.4ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:29:19,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-04-15 02:29:19,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 312. [2021-04-15 02:29:19,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.987138263665595) internal successors, (929), 311 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:19,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 929 transitions. [2021-04-15 02:29:19,389 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 929 transitions. Word has length 17 [2021-04-15 02:29:19,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:19,389 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 929 transitions. [2021-04-15 02:29:19,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:19,389 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 929 transitions. [2021-04-15 02:29:19,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:19,389 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:19,389 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:19,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1197,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:19,601 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:19,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:19,601 INFO L82 PathProgramCache]: Analyzing trace with hash -847464781, now seen corresponding path program 89 times [2021-04-15 02:29:19,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:19,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084597824] [2021-04-15 02:29:19,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:19,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084597824] [2021-04-15 02:29:19,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99222503] [2021-04-15 02:29:19,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:19,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:29:19,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:19,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:19,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:19,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:19,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:19,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:19,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:19,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:19,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:19,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:19,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:29:19,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811178356] [2021-04-15 02:29:19,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:19,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:19,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:19,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:19,883 INFO L87 Difference]: Start difference. First operand 312 states and 929 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:20,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:20,137 INFO L93 Difference]: Finished difference Result 358 states and 1007 transitions. [2021-04-15 02:29:20,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:29:20,137 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:20,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:20,138 INFO L225 Difference]: With dead ends: 358 [2021-04-15 02:29:20,138 INFO L226 Difference]: Without dead ends: 353 [2021-04-15 02:29:20,138 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 194.8ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:29:20,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-04-15 02:29:20,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 310. [2021-04-15 02:29:20,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9967637540453076) internal successors, (926), 309 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:20,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 926 transitions. [2021-04-15 02:29:20,142 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 926 transitions. Word has length 17 [2021-04-15 02:29:20,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:20,142 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 926 transitions. [2021-04-15 02:29:20,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:20,142 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 926 transitions. [2021-04-15 02:29:20,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:20,143 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:20,143 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:20,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1220 [2021-04-15 02:29:20,343 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:20,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:20,344 INFO L82 PathProgramCache]: Analyzing trace with hash 641940215, now seen corresponding path program 90 times [2021-04-15 02:29:20,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:20,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30330838] [2021-04-15 02:29:20,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:20,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30330838] [2021-04-15 02:29:20,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105203080] [2021-04-15 02:29:20,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:20,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:29:20,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:20,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:20,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:20,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:20,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:20,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:20,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:20,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:20,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:20,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:20,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:20,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 02:29:20,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714793787] [2021-04-15 02:29:20,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:29:20,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:20,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:29:20,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:20,628 INFO L87 Difference]: Start difference. First operand 310 states and 926 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:20,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:20,923 INFO L93 Difference]: Finished difference Result 390 states and 1052 transitions. [2021-04-15 02:29:20,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:29:20,923 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:20,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:20,924 INFO L225 Difference]: With dead ends: 390 [2021-04-15 02:29:20,924 INFO L226 Difference]: Without dead ends: 367 [2021-04-15 02:29:20,924 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 237.8ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:29:20,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-04-15 02:29:20,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 308. [2021-04-15 02:29:20,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.96742671009772) internal successors, (911), 307 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:20,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 911 transitions. [2021-04-15 02:29:20,928 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 911 transitions. Word has length 17 [2021-04-15 02:29:20,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:20,928 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 911 transitions. [2021-04-15 02:29:20,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:20,928 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 911 transitions. [2021-04-15 02:29:20,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:20,928 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:20,928 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:21,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1247,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:21,141 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:21,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:21,141 INFO L82 PathProgramCache]: Analyzing trace with hash -249381416, now seen corresponding path program 91 times [2021-04-15 02:29:21,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:21,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2177109] [2021-04-15 02:29:21,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:21,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:21,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:21,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2177109] [2021-04-15 02:29:21,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356497944] [2021-04-15 02:29:21,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:21,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:21,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:21,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:21,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:29:21,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390481328] [2021-04-15 02:29:21,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:21,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:21,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:21,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:21,217 INFO L87 Difference]: Start difference. First operand 308 states and 911 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:21,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:21,271 INFO L93 Difference]: Finished difference Result 461 states and 1184 transitions. [2021-04-15 02:29:21,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:29:21,271 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:21,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:21,272 INFO L225 Difference]: With dead ends: 461 [2021-04-15 02:29:21,272 INFO L226 Difference]: Without dead ends: 461 [2021-04-15 02:29:21,272 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:29:21,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-04-15 02:29:21,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 321. [2021-04-15 02:29:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.98125) internal successors, (954), 320 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:21,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 954 transitions. [2021-04-15 02:29:21,276 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 954 transitions. Word has length 17 [2021-04-15 02:29:21,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:21,276 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 954 transitions. [2021-04-15 02:29:21,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:21,276 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 954 transitions. [2021-04-15 02:29:21,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:21,277 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:21,277 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:21,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1271,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:21,477 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:21,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:21,478 INFO L82 PathProgramCache]: Analyzing trace with hash -431145165, now seen corresponding path program 92 times [2021-04-15 02:29:21,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:21,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643846954] [2021-04-15 02:29:21,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:21,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:21,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643846954] [2021-04-15 02:29:21,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506344377] [2021-04-15 02:29:21,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:21,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:21,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:21,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:21,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:21,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:21,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:21,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:21,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:21,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:21,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:21,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:21,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 02:29:21,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481036789] [2021-04-15 02:29:21,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:29:21,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:21,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:29:21,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:21,778 INFO L87 Difference]: Start difference. First operand 321 states and 954 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:22,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:22,057 INFO L93 Difference]: Finished difference Result 404 states and 1118 transitions. [2021-04-15 02:29:22,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:29:22,058 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:22,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:22,058 INFO L225 Difference]: With dead ends: 404 [2021-04-15 02:29:22,059 INFO L226 Difference]: Without dead ends: 399 [2021-04-15 02:29:22,059 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 224.0ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:29:22,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-04-15 02:29:22,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 321. [2021-04-15 02:29:22,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.98125) internal successors, (954), 320 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:22,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 954 transitions. [2021-04-15 02:29:22,062 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 954 transitions. Word has length 17 [2021-04-15 02:29:22,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:22,063 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 954 transitions. [2021-04-15 02:29:22,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:22,063 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 954 transitions. [2021-04-15 02:29:22,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:22,063 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:22,063 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:22,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1272 [2021-04-15 02:29:22,277 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:22,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:22,278 INFO L82 PathProgramCache]: Analyzing trace with hash 288474162, now seen corresponding path program 93 times [2021-04-15 02:29:22,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:22,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265308550] [2021-04-15 02:29:22,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:22,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265308550] [2021-04-15 02:29:22,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200847994] [2021-04-15 02:29:22,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:22,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:29:22,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:22,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:22,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:22,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:22,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:29:22,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843436200] [2021-04-15 02:29:22,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:22,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:22,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:22,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:22,354 INFO L87 Difference]: Start difference. First operand 321 states and 954 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:22,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:22,443 INFO L93 Difference]: Finished difference Result 535 states and 1451 transitions. [2021-04-15 02:29:22,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:29:22,444 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:22,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:22,445 INFO L225 Difference]: With dead ends: 535 [2021-04-15 02:29:22,445 INFO L226 Difference]: Without dead ends: 535 [2021-04-15 02:29:22,445 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:22,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-04-15 02:29:22,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 405. [2021-04-15 02:29:22,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.027227722772277) internal successors, (1223), 404 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:22,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1223 transitions. [2021-04-15 02:29:22,450 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1223 transitions. Word has length 17 [2021-04-15 02:29:22,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:22,450 INFO L480 AbstractCegarLoop]: Abstraction has 405 states and 1223 transitions. [2021-04-15 02:29:22,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:22,450 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1223 transitions. [2021-04-15 02:29:22,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:22,450 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:22,450 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:22,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1294,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:22,665 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:22,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:22,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1767950263, now seen corresponding path program 94 times [2021-04-15 02:29:22,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:22,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572680637] [2021-04-15 02:29:22,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:22,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572680637] [2021-04-15 02:29:22,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639749045] [2021-04-15 02:29:22,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:22,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:22,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:22,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:22,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:22,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:22,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:22,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:22,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:22,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:22,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:22,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:22,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:29:22,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939217432] [2021-04-15 02:29:22,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:22,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:22,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:22,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:22,935 INFO L87 Difference]: Start difference. First operand 405 states and 1223 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:23,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:23,119 INFO L93 Difference]: Finished difference Result 449 states and 1310 transitions. [2021-04-15 02:29:23,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:29:23,119 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:23,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:23,120 INFO L225 Difference]: With dead ends: 449 [2021-04-15 02:29:23,120 INFO L226 Difference]: Without dead ends: 439 [2021-04-15 02:29:23,120 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 215.4ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:29:23,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-04-15 02:29:23,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 408. [2021-04-15 02:29:23,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.022113022113022) internal successors, (1230), 407 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:23,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1230 transitions. [2021-04-15 02:29:23,124 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1230 transitions. Word has length 17 [2021-04-15 02:29:23,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:23,124 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 1230 transitions. [2021-04-15 02:29:23,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:23,124 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1230 transitions. [2021-04-15 02:29:23,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:23,125 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:23,125 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:23,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1295,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:23,339 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:23,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:23,339 INFO L82 PathProgramCache]: Analyzing trace with hash 899120009, now seen corresponding path program 95 times [2021-04-15 02:29:23,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:23,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656216262] [2021-04-15 02:29:23,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:23,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:23,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656216262] [2021-04-15 02:29:23,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416573537] [2021-04-15 02:29:23,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:23,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:29:23,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:23,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:23,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:23,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:23,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:23,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:23,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:23,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:23,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:23,634 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:23,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:23,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 02:29:23,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407242732] [2021-04-15 02:29:23,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:29:23,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:23,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:29:23,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:23,634 INFO L87 Difference]: Start difference. First operand 408 states and 1230 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:23,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:23,828 INFO L93 Difference]: Finished difference Result 472 states and 1325 transitions. [2021-04-15 02:29:23,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:29:23,828 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:23,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:23,829 INFO L225 Difference]: With dead ends: 472 [2021-04-15 02:29:23,829 INFO L226 Difference]: Without dead ends: 459 [2021-04-15 02:29:23,829 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 219.6ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:29:23,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-04-15 02:29:23,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 408. [2021-04-15 02:29:23,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0098280098280097) internal successors, (1225), 407 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:23,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1225 transitions. [2021-04-15 02:29:23,834 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1225 transitions. Word has length 17 [2021-04-15 02:29:23,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:23,834 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 1225 transitions. [2021-04-15 02:29:23,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:23,834 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1225 transitions. [2021-04-15 02:29:23,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:23,834 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:23,834 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:24,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1323 [2021-04-15 02:29:24,035 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:24,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:24,035 INFO L82 PathProgramCache]: Analyzing trace with hash -603552507, now seen corresponding path program 96 times [2021-04-15 02:29:24,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:24,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053451424] [2021-04-15 02:29:24,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:24,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053451424] [2021-04-15 02:29:24,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778886111] [2021-04-15 02:29:24,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:24,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:29:24,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:24,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:24,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:24,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:24,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:24,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:24,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:24,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:24,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:24,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:24,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:29:24,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642907618] [2021-04-15 02:29:24,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:24,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:24,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:24,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:24,328 INFO L87 Difference]: Start difference. First operand 408 states and 1225 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:24,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:24,543 INFO L93 Difference]: Finished difference Result 440 states and 1285 transitions. [2021-04-15 02:29:24,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:29:24,543 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:24,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:24,544 INFO L225 Difference]: With dead ends: 440 [2021-04-15 02:29:24,544 INFO L226 Difference]: Without dead ends: 435 [2021-04-15 02:29:24,544 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 203.1ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:29:24,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-04-15 02:29:24,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 408. [2021-04-15 02:29:24,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0098280098280097) internal successors, (1225), 407 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:24,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1225 transitions. [2021-04-15 02:29:24,556 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1225 transitions. Word has length 17 [2021-04-15 02:29:24,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:24,556 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 1225 transitions. [2021-04-15 02:29:24,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:24,556 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1225 transitions. [2021-04-15 02:29:24,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:24,557 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:24,557 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:24,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1355 [2021-04-15 02:29:24,772 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:24,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:24,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1965935331, now seen corresponding path program 97 times [2021-04-15 02:29:24,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:24,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88062236] [2021-04-15 02:29:24,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:24,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88062236] [2021-04-15 02:29:24,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256489606] [2021-04-15 02:29:24,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:24,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:24,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:25,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:25,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:25,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:25,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:25,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:25,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:25,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:25,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:29:25,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640350689] [2021-04-15 02:29:25,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:25,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:25,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:25,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:25,081 INFO L87 Difference]: Start difference. First operand 408 states and 1225 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:25,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:25,288 INFO L93 Difference]: Finished difference Result 447 states and 1289 transitions. [2021-04-15 02:29:25,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:29:25,289 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:25,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:25,290 INFO L225 Difference]: With dead ends: 447 [2021-04-15 02:29:25,290 INFO L226 Difference]: Without dead ends: 442 [2021-04-15 02:29:25,290 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 196.7ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:29:25,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-04-15 02:29:25,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 408. [2021-04-15 02:29:25,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0098280098280097) internal successors, (1225), 407 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:25,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1225 transitions. [2021-04-15 02:29:25,295 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1225 transitions. Word has length 17 [2021-04-15 02:29:25,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:25,295 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 1225 transitions. [2021-04-15 02:29:25,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:25,295 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1225 transitions. [2021-04-15 02:29:25,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:25,295 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:25,295 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:25,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1384,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:25,509 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:25,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:25,509 INFO L82 PathProgramCache]: Analyzing trace with hash -839626969, now seen corresponding path program 98 times [2021-04-15 02:29:25,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:25,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691861423] [2021-04-15 02:29:25,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:25,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691861423] [2021-04-15 02:29:25,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515560612] [2021-04-15 02:29:25,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:25,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:25,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:25,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:25,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:25,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:25,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:25,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:25,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:25,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:25,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:25,883 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:25,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:25,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:29:25,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551534473] [2021-04-15 02:29:25,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:25,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:25,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:25,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:25,884 INFO L87 Difference]: Start difference. First operand 408 states and 1225 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:26,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:26,056 INFO L93 Difference]: Finished difference Result 462 states and 1322 transitions. [2021-04-15 02:29:26,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:29:26,056 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:26,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:26,057 INFO L225 Difference]: With dead ends: 462 [2021-04-15 02:29:26,057 INFO L226 Difference]: Without dead ends: 457 [2021-04-15 02:29:26,057 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 274.8ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:29:26,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-04-15 02:29:26,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 408. [2021-04-15 02:29:26,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0098280098280097) internal successors, (1225), 407 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:26,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1225 transitions. [2021-04-15 02:29:26,061 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1225 transitions. Word has length 17 [2021-04-15 02:29:26,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:26,061 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 1225 transitions. [2021-04-15 02:29:26,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:26,061 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1225 transitions. [2021-04-15 02:29:26,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:26,062 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:26,062 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:26,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1410 [2021-04-15 02:29:26,262 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:26,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:26,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1912712349, now seen corresponding path program 99 times [2021-04-15 02:29:26,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:26,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557069298] [2021-04-15 02:29:26,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:26,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:26,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557069298] [2021-04-15 02:29:26,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844178295] [2021-04-15 02:29:26,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:26,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:29:26,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:26,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:26,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:26,502 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:26,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:26,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:26,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:26,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:26,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:26,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:26,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 02:29:26,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885935627] [2021-04-15 02:29:26,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:29:26,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:26,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:29:26,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:26,538 INFO L87 Difference]: Start difference. First operand 408 states and 1225 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:26,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:26,752 INFO L93 Difference]: Finished difference Result 490 states and 1379 transitions. [2021-04-15 02:29:26,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:29:26,752 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:26,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:26,753 INFO L225 Difference]: With dead ends: 490 [2021-04-15 02:29:26,753 INFO L226 Difference]: Without dead ends: 477 [2021-04-15 02:29:26,753 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 216.6ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:29:26,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-04-15 02:29:26,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 408. [2021-04-15 02:29:26,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0) internal successors, (1221), 407 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:26,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1221 transitions. [2021-04-15 02:29:26,758 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1221 transitions. Word has length 17 [2021-04-15 02:29:26,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:26,758 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 1221 transitions. [2021-04-15 02:29:26,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:26,758 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1221 transitions. [2021-04-15 02:29:26,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:26,758 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:26,758 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:26,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1443 [2021-04-15 02:29:26,965 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:26,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:26,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1193093022, now seen corresponding path program 100 times [2021-04-15 02:29:26,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:26,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155818320] [2021-04-15 02:29:26,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:27,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155818320] [2021-04-15 02:29:27,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229976003] [2021-04-15 02:29:27,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:27,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:27,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:27,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:27,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:27,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:27,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:29:27,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73745657] [2021-04-15 02:29:27,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:29:27,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:27,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:29:27,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:27,052 INFO L87 Difference]: Start difference. First operand 408 states and 1221 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:27,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:27,126 INFO L93 Difference]: Finished difference Result 549 states and 1446 transitions. [2021-04-15 02:29:27,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:29:27,126 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:27,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:27,127 INFO L225 Difference]: With dead ends: 549 [2021-04-15 02:29:27,127 INFO L226 Difference]: Without dead ends: 549 [2021-04-15 02:29:27,127 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:27,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-04-15 02:29:27,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 317. [2021-04-15 02:29:27,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.9272151898734178) internal successors, (925), 316 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 925 transitions. [2021-04-15 02:29:27,130 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 925 transitions. Word has length 17 [2021-04-15 02:29:27,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:27,131 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 925 transitions. [2021-04-15 02:29:27,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 925 transitions. [2021-04-15 02:29:27,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:27,131 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:27,131 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:27,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1467 [2021-04-15 02:29:27,332 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:27,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:27,332 INFO L82 PathProgramCache]: Analyzing trace with hash -818620761, now seen corresponding path program 101 times [2021-04-15 02:29:27,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:27,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965724495] [2021-04-15 02:29:27,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:27,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:27,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965724495] [2021-04-15 02:29:27,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052967467] [2021-04-15 02:29:27,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:27,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:29:27,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:27,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:27,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:27,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:27,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:27,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:27,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:27,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:27,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:27,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:27,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 02:29:27,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704176770] [2021-04-15 02:29:27,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:29:27,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:27,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:29:27,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:27,645 INFO L87 Difference]: Start difference. First operand 317 states and 925 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:27,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:27,906 INFO L93 Difference]: Finished difference Result 398 states and 1075 transitions. [2021-04-15 02:29:27,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:29:27,907 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:27,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:27,907 INFO L225 Difference]: With dead ends: 398 [2021-04-15 02:29:27,907 INFO L226 Difference]: Without dead ends: 393 [2021-04-15 02:29:27,908 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 251.6ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:29:27,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-04-15 02:29:27,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 317. [2021-04-15 02:29:27,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.9272151898734178) internal successors, (925), 316 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:27,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 925 transitions. [2021-04-15 02:29:27,911 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 925 transitions. Word has length 17 [2021-04-15 02:29:27,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:27,911 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 925 transitions. [2021-04-15 02:29:27,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:27,911 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 925 transitions. [2021-04-15 02:29:27,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:27,911 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:27,911 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:28,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1468 [2021-04-15 02:29:28,112 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:28,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:28,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1699439288, now seen corresponding path program 102 times [2021-04-15 02:29:28,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:28,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058935599] [2021-04-15 02:29:28,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:28,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058935599] [2021-04-15 02:29:28,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464587816] [2021-04-15 02:29:28,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:28,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:29:28,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:28,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:28,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:28,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:28,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:28,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:29:28,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571333461] [2021-04-15 02:29:28,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:29:28,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:28,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:29:28,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:28,199 INFO L87 Difference]: Start difference. First operand 317 states and 925 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:28,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:28,302 INFO L93 Difference]: Finished difference Result 478 states and 1278 transitions. [2021-04-15 02:29:28,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:29:28,303 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:28,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:28,304 INFO L225 Difference]: With dead ends: 478 [2021-04-15 02:29:28,304 INFO L226 Difference]: Without dead ends: 478 [2021-04-15 02:29:28,304 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:29:28,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-04-15 02:29:28,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 361. [2021-04-15 02:29:28,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.9611111111111112) internal successors, (1066), 360 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:28,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1066 transitions. [2021-04-15 02:29:28,307 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1066 transitions. Word has length 17 [2021-04-15 02:29:28,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:28,307 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 1066 transitions. [2021-04-15 02:29:28,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:28,308 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1066 transitions. [2021-04-15 02:29:28,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:28,308 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:28,308 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:28,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1503,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:28,508 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:28,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:28,509 INFO L82 PathProgramCache]: Analyzing trace with hash 815564467, now seen corresponding path program 103 times [2021-04-15 02:29:28,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:28,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124976886] [2021-04-15 02:29:28,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:28,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:28,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124976886] [2021-04-15 02:29:28,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935751870] [2021-04-15 02:29:28,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:28,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:28,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:28,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:28,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:28,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:28,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:28,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:28,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:28,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:28,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 02:29:28,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988436211] [2021-04-15 02:29:28,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:29:28,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:28,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:29:28,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:28,829 INFO L87 Difference]: Start difference. First operand 361 states and 1066 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:29,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:29,085 INFO L93 Difference]: Finished difference Result 418 states and 1180 transitions. [2021-04-15 02:29:29,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:29:29,085 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:29,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:29,086 INFO L225 Difference]: With dead ends: 418 [2021-04-15 02:29:29,086 INFO L226 Difference]: Without dead ends: 408 [2021-04-15 02:29:29,086 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 233.4ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:29:29,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-04-15 02:29:29,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 366. [2021-04-15 02:29:29,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.967123287671233) internal successors, (1083), 365 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:29,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1083 transitions. [2021-04-15 02:29:29,089 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1083 transitions. Word has length 17 [2021-04-15 02:29:29,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:29,089 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1083 transitions. [2021-04-15 02:29:29,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:29,090 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1083 transitions. [2021-04-15 02:29:29,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:29,090 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:29,090 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:29,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1504,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:29,290 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:29,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:29,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1764893969, now seen corresponding path program 104 times [2021-04-15 02:29:29,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:29,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453667250] [2021-04-15 02:29:29,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:29,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453667250] [2021-04-15 02:29:29,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051719828] [2021-04-15 02:29:29,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:29,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:29,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:29,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:29,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:29,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:29,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:29,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:29,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:29,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:29,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:29,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:29,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 02:29:29,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960639804] [2021-04-15 02:29:29,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:29:29,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:29,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:29:29,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:29,579 INFO L87 Difference]: Start difference. First operand 366 states and 1083 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:29,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:29,856 INFO L93 Difference]: Finished difference Result 443 states and 1194 transitions. [2021-04-15 02:29:29,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:29:29,856 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:29,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:29,857 INFO L225 Difference]: With dead ends: 443 [2021-04-15 02:29:29,857 INFO L226 Difference]: Without dead ends: 428 [2021-04-15 02:29:29,857 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 248.7ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:29:29,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-04-15 02:29:29,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 366. [2021-04-15 02:29:29,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9616438356164383) internal successors, (1081), 365 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:29,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1081 transitions. [2021-04-15 02:29:29,862 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1081 transitions. Word has length 17 [2021-04-15 02:29:29,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:29,862 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1081 transitions. [2021-04-15 02:29:29,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:29,862 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1081 transitions. [2021-04-15 02:29:29,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:29,862 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:29,862 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:30,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1527,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:30,073 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:30,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:30,073 INFO L82 PathProgramCache]: Analyzing trace with hash 712505045, now seen corresponding path program 105 times [2021-04-15 02:29:30,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:30,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658811137] [2021-04-15 02:29:30,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:30,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658811137] [2021-04-15 02:29:30,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290263348] [2021-04-15 02:29:30,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:30,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:29:30,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:30,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:30,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:30,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:30,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:30,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:30,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:30,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:30,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:30,366 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:30,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:30,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:29:30,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517274965] [2021-04-15 02:29:30,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:30,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:30,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:30,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:30,367 INFO L87 Difference]: Start difference. First operand 366 states and 1081 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:30,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:30,563 INFO L93 Difference]: Finished difference Result 398 states and 1150 transitions. [2021-04-15 02:29:30,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:29:30,563 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:30,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:30,564 INFO L225 Difference]: With dead ends: 398 [2021-04-15 02:29:30,564 INFO L226 Difference]: Without dead ends: 393 [2021-04-15 02:29:30,564 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 172.6ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:30,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-04-15 02:29:30,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 366. [2021-04-15 02:29:30,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9616438356164383) internal successors, (1081), 365 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:30,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1081 transitions. [2021-04-15 02:29:30,569 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1081 transitions. Word has length 17 [2021-04-15 02:29:30,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:30,569 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1081 transitions. [2021-04-15 02:29:30,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:30,569 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1081 transitions. [2021-04-15 02:29:30,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:30,570 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:30,570 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:30,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1560,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:30,784 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:30,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:30,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1012974413, now seen corresponding path program 106 times [2021-04-15 02:29:30,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:30,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793251390] [2021-04-15 02:29:30,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:30,845 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:30,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793251390] [2021-04-15 02:29:30,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345514196] [2021-04-15 02:29:30,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:30,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:30,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:30,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:30,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:31,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:31,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:31,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:31,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:31,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:31,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:31,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:31,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:29:31,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759787387] [2021-04-15 02:29:31,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:31,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:31,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:31,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:31,078 INFO L87 Difference]: Start difference. First operand 366 states and 1081 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:31,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:31,354 INFO L93 Difference]: Finished difference Result 409 states and 1153 transitions. [2021-04-15 02:29:31,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:29:31,355 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:31,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:31,355 INFO L225 Difference]: With dead ends: 409 [2021-04-15 02:29:31,355 INFO L226 Difference]: Without dead ends: 404 [2021-04-15 02:29:31,356 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 205.1ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:29:31,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-04-15 02:29:31,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 366. [2021-04-15 02:29:31,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9616438356164383) internal successors, (1081), 365 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:31,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1081 transitions. [2021-04-15 02:29:31,359 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1081 transitions. Word has length 17 [2021-04-15 02:29:31,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:31,360 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1081 transitions. [2021-04-15 02:29:31,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:31,360 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1081 transitions. [2021-04-15 02:29:31,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:31,360 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:31,360 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:31,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1598 [2021-04-15 02:29:31,573 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:31,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:31,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1645968754, now seen corresponding path program 107 times [2021-04-15 02:29:31,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:31,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173040314] [2021-04-15 02:29:31,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:31,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173040314] [2021-04-15 02:29:31,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372231543] [2021-04-15 02:29:31,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:31,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:29:31,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:31,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:31,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:31,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:31,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:29:31,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594429744] [2021-04-15 02:29:31,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:31,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:31,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:31,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:31,645 INFO L87 Difference]: Start difference. First operand 366 states and 1081 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:31,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:31,696 INFO L93 Difference]: Finished difference Result 517 states and 1369 transitions. [2021-04-15 02:29:31,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:29:31,696 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:31,697 INFO L225 Difference]: With dead ends: 517 [2021-04-15 02:29:31,697 INFO L226 Difference]: Without dead ends: 517 [2021-04-15 02:29:31,697 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:29:31,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-04-15 02:29:31,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 397. [2021-04-15 02:29:31,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.9823232323232323) internal successors, (1181), 396 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:31,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1181 transitions. [2021-04-15 02:29:31,701 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1181 transitions. Word has length 17 [2021-04-15 02:29:31,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:31,701 INFO L480 AbstractCegarLoop]: Abstraction has 397 states and 1181 transitions. [2021-04-15 02:29:31,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:31,702 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1181 transitions. [2021-04-15 02:29:31,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:31,702 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:31,702 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:31,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1627 [2021-04-15 02:29:31,903 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:31,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:31,903 INFO L82 PathProgramCache]: Analyzing trace with hash 476430583, now seen corresponding path program 108 times [2021-04-15 02:29:31,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:31,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789892698] [2021-04-15 02:29:31,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:31,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789892698] [2021-04-15 02:29:31,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148538278] [2021-04-15 02:29:31,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:31,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:29:31,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:31,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:31,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:32,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:32,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:32,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:32,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:32,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:32,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:32,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:32,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:29:32,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880657907] [2021-04-15 02:29:32,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:32,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:32,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:32,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:32,175 INFO L87 Difference]: Start difference. First operand 397 states and 1181 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:32,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:32,416 INFO L93 Difference]: Finished difference Result 450 states and 1270 transitions. [2021-04-15 02:29:32,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:29:32,416 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:32,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:32,417 INFO L225 Difference]: With dead ends: 450 [2021-04-15 02:29:32,417 INFO L226 Difference]: Without dead ends: 445 [2021-04-15 02:29:32,417 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:29:32,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-04-15 02:29:32,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 399. [2021-04-15 02:29:32,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.979899497487437) internal successors, (1186), 398 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:32,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1186 transitions. [2021-04-15 02:29:32,421 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1186 transitions. Word has length 17 [2021-04-15 02:29:32,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:32,421 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 1186 transitions. [2021-04-15 02:29:32,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:32,422 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1186 transitions. [2021-04-15 02:29:32,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:32,422 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:32,422 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:32,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1628,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:32,622 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:32,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:32,623 INFO L82 PathProgramCache]: Analyzing trace with hash -414891048, now seen corresponding path program 109 times [2021-04-15 02:29:32,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:32,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313573593] [2021-04-15 02:29:32,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:32,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:32,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313573593] [2021-04-15 02:29:32,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479911855] [2021-04-15 02:29:32,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:32,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:32,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:32,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:32,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:32,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:29:32,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047809284] [2021-04-15 02:29:32,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:32,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:32,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:32,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:32,710 INFO L87 Difference]: Start difference. First operand 399 states and 1186 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:32,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:32,780 INFO L93 Difference]: Finished difference Result 520 states and 1374 transitions. [2021-04-15 02:29:32,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:29:32,780 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:32,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:32,781 INFO L225 Difference]: With dead ends: 520 [2021-04-15 02:29:32,781 INFO L226 Difference]: Without dead ends: 520 [2021-04-15 02:29:32,781 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:29:32,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-04-15 02:29:32,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 396. [2021-04-15 02:29:32,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.969620253164557) internal successors, (1173), 395 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:32,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1173 transitions. [2021-04-15 02:29:32,786 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1173 transitions. Word has length 17 [2021-04-15 02:29:32,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:32,786 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 1173 transitions. [2021-04-15 02:29:32,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:32,786 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1173 transitions. [2021-04-15 02:29:32,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:32,786 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:32,786 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:32,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1653 [2021-04-15 02:29:32,987 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:32,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:32,987 INFO L82 PathProgramCache]: Analyzing trace with hash -596654797, now seen corresponding path program 110 times [2021-04-15 02:29:32,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:32,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034952184] [2021-04-15 02:29:32,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:33,050 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:33,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034952184] [2021-04-15 02:29:33,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893871492] [2021-04-15 02:29:33,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:33,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:33,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:33,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:33,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:33,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:33,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:33,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:33,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:33,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:33,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:33,295 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:33,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:33,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 02:29:33,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131028820] [2021-04-15 02:29:33,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:33,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:33,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:33,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:33,296 INFO L87 Difference]: Start difference. First operand 396 states and 1173 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:33,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:33,513 INFO L93 Difference]: Finished difference Result 459 states and 1275 transitions. [2021-04-15 02:29:33,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:29:33,513 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:33,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:33,514 INFO L225 Difference]: With dead ends: 459 [2021-04-15 02:29:33,514 INFO L226 Difference]: Without dead ends: 454 [2021-04-15 02:29:33,514 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:29:33,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-04-15 02:29:33,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 396. [2021-04-15 02:29:33,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.969620253164557) internal successors, (1173), 395 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:33,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1173 transitions. [2021-04-15 02:29:33,519 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1173 transitions. Word has length 17 [2021-04-15 02:29:33,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:33,519 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 1173 transitions. [2021-04-15 02:29:33,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:33,519 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1173 transitions. [2021-04-15 02:29:33,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:33,519 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:33,519 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:33,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1654,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:33,737 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:33,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:33,737 INFO L82 PathProgramCache]: Analyzing trace with hash 122964530, now seen corresponding path program 111 times [2021-04-15 02:29:33,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:33,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901101839] [2021-04-15 02:29:33,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:33,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901101839] [2021-04-15 02:29:33,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317471571] [2021-04-15 02:29:33,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:29:33,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:29:33,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:33,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:33,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:33,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:33,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:33,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:29:33,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242254183] [2021-04-15 02:29:33,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:33,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:33,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:33,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:33,825 INFO L87 Difference]: Start difference. First operand 396 states and 1173 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:33,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:33,878 INFO L93 Difference]: Finished difference Result 484 states and 1366 transitions. [2021-04-15 02:29:33,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:29:33,879 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:33,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:33,880 INFO L225 Difference]: With dead ends: 484 [2021-04-15 02:29:33,880 INFO L226 Difference]: Without dead ends: 484 [2021-04-15 02:29:33,880 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:29:33,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-04-15 02:29:33,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 431. [2021-04-15 02:29:33,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.974418604651163) internal successors, (1279), 430 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:33,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1279 transitions. [2021-04-15 02:29:33,884 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1279 transitions. Word has length 17 [2021-04-15 02:29:33,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:33,884 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 1279 transitions. [2021-04-15 02:29:33,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:33,884 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1279 transitions. [2021-04-15 02:29:33,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:33,885 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:33,885 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:34,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1684 [2021-04-15 02:29:34,093 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:34,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:34,093 INFO L82 PathProgramCache]: Analyzing trace with hash 497436791, now seen corresponding path program 112 times [2021-04-15 02:29:34,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:34,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761291148] [2021-04-15 02:29:34,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:34,154 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:34,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761291148] [2021-04-15 02:29:34,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451876735] [2021-04-15 02:29:34,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:34,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:34,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:34,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:34,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:34,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:34,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:34,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:34,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:34,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:34,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:34,391 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:34,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:34,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 02:29:34,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700522134] [2021-04-15 02:29:34,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:29:34,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:34,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:29:34,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:34,392 INFO L87 Difference]: Start difference. First operand 431 states and 1279 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:34,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:34,686 INFO L93 Difference]: Finished difference Result 508 states and 1390 transitions. [2021-04-15 02:29:34,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:29:34,687 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:34,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:34,687 INFO L225 Difference]: With dead ends: 508 [2021-04-15 02:29:34,687 INFO L226 Difference]: Without dead ends: 493 [2021-04-15 02:29:34,687 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 240.3ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:29:34,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-04-15 02:29:34,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 431. [2021-04-15 02:29:34,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.969767441860465) internal successors, (1277), 430 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:34,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1277 transitions. [2021-04-15 02:29:34,692 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1277 transitions. Word has length 17 [2021-04-15 02:29:34,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:34,692 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 1277 transitions. [2021-04-15 02:29:34,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:34,692 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1277 transitions. [2021-04-15 02:29:34,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:34,692 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:34,693 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:34,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1685,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:34,893 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:34,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:34,893 INFO L82 PathProgramCache]: Analyzing trace with hash -383381736, now seen corresponding path program 113 times [2021-04-15 02:29:34,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:34,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172744313] [2021-04-15 02:29:34,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:34,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172744313] [2021-04-15 02:29:34,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933790634] [2021-04-15 02:29:34,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:34,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:29:34,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:34,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:34,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:34,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:34,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:34,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:29:34,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835934225] [2021-04-15 02:29:34,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:29:34,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:34,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:29:34,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:34,976 INFO L87 Difference]: Start difference. First operand 431 states and 1277 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:35,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:35,065 INFO L93 Difference]: Finished difference Result 511 states and 1418 transitions. [2021-04-15 02:29:35,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:29:35,065 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:35,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:35,066 INFO L225 Difference]: With dead ends: 511 [2021-04-15 02:29:35,066 INFO L226 Difference]: Without dead ends: 511 [2021-04-15 02:29:35,066 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:35,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-04-15 02:29:35,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 438. [2021-04-15 02:29:35,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.9702517162471396) internal successors, (1298), 437 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:35,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1298 transitions. [2021-04-15 02:29:35,070 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1298 transitions. Word has length 17 [2021-04-15 02:29:35,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:35,070 INFO L480 AbstractCegarLoop]: Abstraction has 438 states and 1298 transitions. [2021-04-15 02:29:35,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:35,071 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1298 transitions. [2021-04-15 02:29:35,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:35,071 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:35,071 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:35,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1719,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:35,286 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:35,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:35,287 INFO L82 PathProgramCache]: Analyzing trace with hash 54537651, now seen corresponding path program 114 times [2021-04-15 02:29:35,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:35,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901204068] [2021-04-15 02:29:35,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:35,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901204068] [2021-04-15 02:29:35,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279091025] [2021-04-15 02:29:35,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:35,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:29:35,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:35,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:35,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:35,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:35,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:35,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:35,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:35,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:35,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:35,585 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:35,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:35,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 02:29:35,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586465731] [2021-04-15 02:29:35,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:29:35,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:35,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:29:35,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:35,585 INFO L87 Difference]: Start difference. First operand 438 states and 1298 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:35,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:35,906 INFO L93 Difference]: Finished difference Result 574 states and 1607 transitions. [2021-04-15 02:29:35,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:29:35,907 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:35,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:35,908 INFO L225 Difference]: With dead ends: 574 [2021-04-15 02:29:35,908 INFO L226 Difference]: Without dead ends: 569 [2021-04-15 02:29:35,908 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 268.4ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:29:35,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-04-15 02:29:35,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 440. [2021-04-15 02:29:35,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.9635535307517085) internal successors, (1301), 439 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:35,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1301 transitions. [2021-04-15 02:29:35,913 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1301 transitions. Word has length 17 [2021-04-15 02:29:35,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:35,913 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 1301 transitions. [2021-04-15 02:29:35,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:35,913 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1301 transitions. [2021-04-15 02:29:35,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:35,914 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:35,914 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:36,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1720 [2021-04-15 02:29:36,128 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:36,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:36,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1099753202, now seen corresponding path program 115 times [2021-04-15 02:29:36,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:36,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757234358] [2021-04-15 02:29:36,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:36,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:36,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757234358] [2021-04-15 02:29:36,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560150227] [2021-04-15 02:29:36,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:36,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:36,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:36,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:36,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:29:36,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457825806] [2021-04-15 02:29:36,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:29:36,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:36,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:29:36,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:36,212 INFO L87 Difference]: Start difference. First operand 440 states and 1301 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:36,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:36,327 INFO L93 Difference]: Finished difference Result 560 states and 1538 transitions. [2021-04-15 02:29:36,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:36,327 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:36,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:36,328 INFO L225 Difference]: With dead ends: 560 [2021-04-15 02:29:36,328 INFO L226 Difference]: Without dead ends: 560 [2021-04-15 02:29:36,328 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:29:36,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-04-15 02:29:36,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 454. [2021-04-15 02:29:36,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.964679911699779) internal successors, (1343), 453 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1343 transitions. [2021-04-15 02:29:36,332 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1343 transitions. Word has length 17 [2021-04-15 02:29:36,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:36,333 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 1343 transitions. [2021-04-15 02:29:36,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:36,333 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1343 transitions. [2021-04-15 02:29:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:36,333 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:36,333 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:36,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1752 [2021-04-15 02:29:36,534 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:36,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:36,534 INFO L82 PathProgramCache]: Analyzing trace with hash -63868743, now seen corresponding path program 116 times [2021-04-15 02:29:36,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:36,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728253522] [2021-04-15 02:29:36,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:36,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728253522] [2021-04-15 02:29:36,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114601799] [2021-04-15 02:29:36,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:36,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:36,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:36,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:36,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:36,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:36,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:29:36,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240177359] [2021-04-15 02:29:36,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:29:36,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:36,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:29:36,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:29:36,631 INFO L87 Difference]: Start difference. First operand 454 states and 1343 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:36,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:36,726 INFO L93 Difference]: Finished difference Result 589 states and 1553 transitions. [2021-04-15 02:29:36,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:29:36,727 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:36,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:36,727 INFO L225 Difference]: With dead ends: 589 [2021-04-15 02:29:36,727 INFO L226 Difference]: Without dead ends: 585 [2021-04-15 02:29:36,728 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:36,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-04-15 02:29:36,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 449. [2021-04-15 02:29:36,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 2.9575892857142856) internal successors, (1325), 448 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:36,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1325 transitions. [2021-04-15 02:29:36,732 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1325 transitions. Word has length 18 [2021-04-15 02:29:36,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:36,733 INFO L480 AbstractCegarLoop]: Abstraction has 449 states and 1325 transitions. [2021-04-15 02:29:36,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:36,733 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1325 transitions. [2021-04-15 02:29:36,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:36,733 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:36,733 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:36,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1753,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:36,945 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:36,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:36,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1505890382, now seen corresponding path program 117 times [2021-04-15 02:29:36,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:36,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713145451] [2021-04-15 02:29:36,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:36,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:36,986 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:36,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713145451] [2021-04-15 02:29:36,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456793109] [2021-04-15 02:29:36,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:37,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:29:37,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:37,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:37,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:37,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:37,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:29:37,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754160617] [2021-04-15 02:29:37,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:29:37,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:37,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:29:37,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:29:37,036 INFO L87 Difference]: Start difference. First operand 449 states and 1325 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:37,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:37,175 INFO L93 Difference]: Finished difference Result 621 states and 1652 transitions. [2021-04-15 02:29:37,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:29:37,175 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:37,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:37,176 INFO L225 Difference]: With dead ends: 621 [2021-04-15 02:29:37,176 INFO L226 Difference]: Without dead ends: 614 [2021-04-15 02:29:37,176 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:29:37,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-04-15 02:29:37,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 459. [2021-04-15 02:29:37,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.9519650655021836) internal successors, (1352), 458 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:37,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1352 transitions. [2021-04-15 02:29:37,182 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1352 transitions. Word has length 18 [2021-04-15 02:29:37,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:37,182 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 1352 transitions. [2021-04-15 02:29:37,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:37,182 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1352 transitions. [2021-04-15 02:29:37,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:37,182 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:37,182 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:37,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1754 [2021-04-15 02:29:37,397 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:37,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:37,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1639250247, now seen corresponding path program 118 times [2021-04-15 02:29:37,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:37,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137042337] [2021-04-15 02:29:37,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:37,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:37,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137042337] [2021-04-15 02:29:37,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972087874] [2021-04-15 02:29:37,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:37,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:37,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:37,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:37,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:37,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:37,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:29:37,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281739482] [2021-04-15 02:29:37,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:37,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:37,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:37,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:37,496 INFO L87 Difference]: Start difference. First operand 459 states and 1352 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:37,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:37,572 INFO L93 Difference]: Finished difference Result 506 states and 1421 transitions. [2021-04-15 02:29:37,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:37,573 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:37,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:37,573 INFO L225 Difference]: With dead ends: 506 [2021-04-15 02:29:37,573 INFO L226 Difference]: Without dead ends: 502 [2021-04-15 02:29:37,574 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:37,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-04-15 02:29:37,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 459. [2021-04-15 02:29:37,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.945414847161572) internal successors, (1349), 458 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:37,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1349 transitions. [2021-04-15 02:29:37,578 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1349 transitions. Word has length 18 [2021-04-15 02:29:37,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:37,578 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 1349 transitions. [2021-04-15 02:29:37,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:37,578 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1349 transitions. [2021-04-15 02:29:37,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:37,579 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:37,579 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:37,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1755,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:37,793 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:37,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:37,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1019692920, now seen corresponding path program 119 times [2021-04-15 02:29:37,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:37,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062790236] [2021-04-15 02:29:37,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:37,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:37,823 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:37,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062790236] [2021-04-15 02:29:37,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954004303] [2021-04-15 02:29:37,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:37,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:29:37,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:37,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:37,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:37,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:37,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:29:37,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585805171] [2021-04-15 02:29:37,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:37,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:37,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:37,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:37,881 INFO L87 Difference]: Start difference. First operand 459 states and 1349 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:37,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:37,925 INFO L93 Difference]: Finished difference Result 603 states and 1587 transitions. [2021-04-15 02:29:37,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:29:37,926 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:37,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:37,926 INFO L225 Difference]: With dead ends: 603 [2021-04-15 02:29:37,926 INFO L226 Difference]: Without dead ends: 603 [2021-04-15 02:29:37,927 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:37,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-04-15 02:29:37,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 454. [2021-04-15 02:29:37,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.933774834437086) internal successors, (1329), 453 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:37,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1329 transitions. [2021-04-15 02:29:37,931 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1329 transitions. Word has length 18 [2021-04-15 02:29:37,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:37,932 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 1329 transitions. [2021-04-15 02:29:37,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:37,932 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1329 transitions. [2021-04-15 02:29:37,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:37,932 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:37,932 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:38,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1756 [2021-04-15 02:29:38,137 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:38,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:38,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1889932499, now seen corresponding path program 120 times [2021-04-15 02:29:38,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:38,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300452673] [2021-04-15 02:29:38,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:38,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300452673] [2021-04-15 02:29:38,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513200029] [2021-04-15 02:29:38,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:38,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:29:38,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:38,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:38,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:38,224 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:38,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:38,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:29:38,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027708591] [2021-04-15 02:29:38,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:38,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:38,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:38,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:38,225 INFO L87 Difference]: Start difference. First operand 454 states and 1329 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:38,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:38,300 INFO L93 Difference]: Finished difference Result 518 states and 1445 transitions. [2021-04-15 02:29:38,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:29:38,300 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:38,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:38,301 INFO L225 Difference]: With dead ends: 518 [2021-04-15 02:29:38,301 INFO L226 Difference]: Without dead ends: 514 [2021-04-15 02:29:38,301 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:38,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-04-15 02:29:38,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 454. [2021-04-15 02:29:38,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.9293598233995586) internal successors, (1327), 453 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:38,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1327 transitions. [2021-04-15 02:29:38,306 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1327 transitions. Word has length 18 [2021-04-15 02:29:38,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:38,306 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 1327 transitions. [2021-04-15 02:29:38,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:38,306 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1327 transitions. [2021-04-15 02:29:38,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:38,306 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:38,306 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:38,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1757,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:38,513 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:38,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:38,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1513713166, now seen corresponding path program 121 times [2021-04-15 02:29:38,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:38,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574709578] [2021-04-15 02:29:38,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:38,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574709578] [2021-04-15 02:29:38,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851857446] [2021-04-15 02:29:38,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:29:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:38,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:38,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:38,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:38,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:29:38,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386410221] [2021-04-15 02:29:38,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:38,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:38,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:38,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:38,597 INFO L87 Difference]: Start difference. First operand 454 states and 1327 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:38,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:38,654 INFO L93 Difference]: Finished difference Result 643 states and 1687 transitions. [2021-04-15 02:29:38,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:29:38,654 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:38,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:38,655 INFO L225 Difference]: With dead ends: 643 [2021-04-15 02:29:38,655 INFO L226 Difference]: Without dead ends: 643 [2021-04-15 02:29:38,655 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:29:38,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-04-15 02:29:38,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 454. [2021-04-15 02:29:38,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.9293598233995586) internal successors, (1327), 453 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:38,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1327 transitions. [2021-04-15 02:29:38,660 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1327 transitions. Word has length 18 [2021-04-15 02:29:38,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:38,660 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 1327 transitions. [2021-04-15 02:29:38,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:38,660 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1327 transitions. [2021-04-15 02:29:38,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:38,661 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:38,661 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:38,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1758 [2021-04-15 02:29:38,875 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:38,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:38,876 INFO L82 PathProgramCache]: Analyzing trace with hash 238012123, now seen corresponding path program 122 times [2021-04-15 02:29:38,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:38,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126429134] [2021-04-15 02:29:38,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:38,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:38,903 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:38,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126429134] [2021-04-15 02:29:38,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138365799] [2021-04-15 02:29:38,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:38,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:38,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:38,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:38,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:29:38,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:38,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:29:38,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259119902] [2021-04-15 02:29:38,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:38,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:38,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:38,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:38,955 INFO L87 Difference]: Start difference. First operand 454 states and 1327 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:39,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:39,003 INFO L93 Difference]: Finished difference Result 607 states and 1609 transitions. [2021-04-15 02:29:39,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:29:39,003 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:39,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:39,004 INFO L225 Difference]: With dead ends: 607 [2021-04-15 02:29:39,004 INFO L226 Difference]: Without dead ends: 605 [2021-04-15 02:29:39,004 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:39,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-04-15 02:29:39,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 455. [2021-04-15 02:29:39,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.909691629955947) internal successors, (1321), 454 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:39,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1321 transitions. [2021-04-15 02:29:39,009 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1321 transitions. Word has length 18 [2021-04-15 02:29:39,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:39,009 INFO L480 AbstractCegarLoop]: Abstraction has 455 states and 1321 transitions. [2021-04-15 02:29:39,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:39,009 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1321 transitions. [2021-04-15 02:29:39,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:39,010 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:39,010 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:39,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1759,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:39,224 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:39,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:39,224 INFO L82 PathProgramCache]: Analyzing trace with hash -539137476, now seen corresponding path program 123 times [2021-04-15 02:29:39,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:39,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293237553] [2021-04-15 02:29:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:39,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:39,250 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:39,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293237553] [2021-04-15 02:29:39,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433669528] [2021-04-15 02:29:39,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:39,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:29:39,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:39,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:39,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:29:39,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:39,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:29:39,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140169113] [2021-04-15 02:29:39,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:39,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:39,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:39,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:39,297 INFO L87 Difference]: Start difference. First operand 455 states and 1321 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:39,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:39,375 INFO L93 Difference]: Finished difference Result 580 states and 1522 transitions. [2021-04-15 02:29:39,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:29:39,375 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:39,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:39,376 INFO L225 Difference]: With dead ends: 580 [2021-04-15 02:29:39,376 INFO L226 Difference]: Without dead ends: 578 [2021-04-15 02:29:39,376 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:29:39,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-04-15 02:29:39,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 463. [2021-04-15 02:29:39,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.911255411255411) internal successors, (1345), 462 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:39,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1345 transitions. [2021-04-15 02:29:39,381 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1345 transitions. Word has length 18 [2021-04-15 02:29:39,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:39,381 INFO L480 AbstractCegarLoop]: Abstraction has 463 states and 1345 transitions. [2021-04-15 02:29:39,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:39,381 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1345 transitions. [2021-04-15 02:29:39,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:39,382 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:39,382 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:39,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1760 [2021-04-15 02:29:39,582 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:39,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:39,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1937661, now seen corresponding path program 124 times [2021-04-15 02:29:39,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:39,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767617217] [2021-04-15 02:29:39,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:39,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767617217] [2021-04-15 02:29:39,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801519270] [2021-04-15 02:29:39,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:39,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:39,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:39,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:39,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:39,669 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:39,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:39,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:29:39,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907037462] [2021-04-15 02:29:39,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:39,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:39,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:39,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:39,671 INFO L87 Difference]: Start difference. First operand 463 states and 1345 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:39,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:39,752 INFO L93 Difference]: Finished difference Result 556 states and 1501 transitions. [2021-04-15 02:29:39,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:29:39,752 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:39,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:39,753 INFO L225 Difference]: With dead ends: 556 [2021-04-15 02:29:39,753 INFO L226 Difference]: Without dead ends: 548 [2021-04-15 02:29:39,753 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:39,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-04-15 02:29:39,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 441. [2021-04-15 02:29:39,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 2.9204545454545454) internal successors, (1285), 440 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:39,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1285 transitions. [2021-04-15 02:29:39,758 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1285 transitions. Word has length 18 [2021-04-15 02:29:39,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:39,758 INFO L480 AbstractCegarLoop]: Abstraction has 441 states and 1285 transitions. [2021-04-15 02:29:39,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:39,758 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1285 transitions. [2021-04-15 02:29:39,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:39,758 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:39,759 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:39,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1761 [2021-04-15 02:29:39,969 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:39,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:39,969 INFO L82 PathProgramCache]: Analyzing trace with hash -889383970, now seen corresponding path program 125 times [2021-04-15 02:29:39,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:39,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285294874] [2021-04-15 02:29:39,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:40,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285294874] [2021-04-15 02:29:40,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853669349] [2021-04-15 02:29:40,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:40,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:29:40,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:40,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:40,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:40,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:40,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:29:40,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659303120] [2021-04-15 02:29:40,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:40,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:40,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:40,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:40,048 INFO L87 Difference]: Start difference. First operand 441 states and 1285 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:40,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:40,105 INFO L93 Difference]: Finished difference Result 589 states and 1530 transitions. [2021-04-15 02:29:40,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:29:40,105 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:40,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:40,106 INFO L225 Difference]: With dead ends: 589 [2021-04-15 02:29:40,106 INFO L226 Difference]: Without dead ends: 589 [2021-04-15 02:29:40,106 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:29:40,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-04-15 02:29:40,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 433. [2021-04-15 02:29:40,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 2.9074074074074074) internal successors, (1256), 432 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:40,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1256 transitions. [2021-04-15 02:29:40,111 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1256 transitions. Word has length 18 [2021-04-15 02:29:40,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:40,111 INFO L480 AbstractCegarLoop]: Abstraction has 433 states and 1256 transitions. [2021-04-15 02:29:40,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:40,111 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1256 transitions. [2021-04-15 02:29:40,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:40,111 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:40,111 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:40,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1762 [2021-04-15 02:29:40,312 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:40,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:40,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1071147719, now seen corresponding path program 126 times [2021-04-15 02:29:40,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:40,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124954359] [2021-04-15 02:29:40,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:40,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:40,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124954359] [2021-04-15 02:29:40,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450550925] [2021-04-15 02:29:40,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:29:40,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:29:40,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:40,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:40,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:40,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:40,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:29:40,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258840392] [2021-04-15 02:29:40,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:29:40,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:40,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:29:40,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:40,395 INFO L87 Difference]: Start difference. First operand 433 states and 1256 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:40,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:40,484 INFO L93 Difference]: Finished difference Result 534 states and 1436 transitions. [2021-04-15 02:29:40,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:29:40,484 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:40,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:40,485 INFO L225 Difference]: With dead ends: 534 [2021-04-15 02:29:40,485 INFO L226 Difference]: Without dead ends: 528 [2021-04-15 02:29:40,485 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:40,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-04-15 02:29:40,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 435. [2021-04-15 02:29:40,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.8940092165898617) internal successors, (1256), 434 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:40,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1256 transitions. [2021-04-15 02:29:40,490 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1256 transitions. Word has length 18 [2021-04-15 02:29:40,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:40,490 INFO L480 AbstractCegarLoop]: Abstraction has 435 states and 1256 transitions. [2021-04-15 02:29:40,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:40,490 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1256 transitions. [2021-04-15 02:29:40,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:40,490 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:40,490 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:40,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1763,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:40,705 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:40,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:40,705 INFO L82 PathProgramCache]: Analyzing trace with hash -351528392, now seen corresponding path program 127 times [2021-04-15 02:29:40,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:40,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899233710] [2021-04-15 02:29:40,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:40,738 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:40,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899233710] [2021-04-15 02:29:40,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969090156] [2021-04-15 02:29:40,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:40,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:40,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:40,787 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:40,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:40,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:29:40,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134385482] [2021-04-15 02:29:40,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:29:40,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:40,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:29:40,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:40,787 INFO L87 Difference]: Start difference. First operand 435 states and 1256 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:40,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:40,872 INFO L93 Difference]: Finished difference Result 650 states and 1663 transitions. [2021-04-15 02:29:40,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:29:40,872 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:40,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:40,873 INFO L225 Difference]: With dead ends: 650 [2021-04-15 02:29:40,873 INFO L226 Difference]: Without dead ends: 650 [2021-04-15 02:29:40,873 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:40,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-04-15 02:29:40,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 416. [2021-04-15 02:29:40,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.8891566265060242) internal successors, (1199), 415 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:40,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1199 transitions. [2021-04-15 02:29:40,877 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1199 transitions. Word has length 18 [2021-04-15 02:29:40,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:40,878 INFO L480 AbstractCegarLoop]: Abstraction has 416 states and 1199 transitions. [2021-04-15 02:29:40,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:40,878 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1199 transitions. [2021-04-15 02:29:40,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:40,878 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:40,878 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:41,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1764 [2021-04-15 02:29:41,079 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:41,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:41,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1243555061, now seen corresponding path program 128 times [2021-04-15 02:29:41,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:41,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128382613] [2021-04-15 02:29:41,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:41,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128382613] [2021-04-15 02:29:41,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525808739] [2021-04-15 02:29:41,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:41,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:41,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:41,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:41,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:29:41,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:41,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:29:41,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79300686] [2021-04-15 02:29:41,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:41,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:41,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:41,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:41,154 INFO L87 Difference]: Start difference. First operand 416 states and 1199 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:41,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:41,196 INFO L93 Difference]: Finished difference Result 564 states and 1469 transitions. [2021-04-15 02:29:41,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:29:41,196 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:41,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:41,197 INFO L225 Difference]: With dead ends: 564 [2021-04-15 02:29:41,197 INFO L226 Difference]: Without dead ends: 562 [2021-04-15 02:29:41,197 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:41,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-04-15 02:29:41,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 408. [2021-04-15 02:29:41,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.8746928746928746) internal successors, (1170), 407 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:41,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1170 transitions. [2021-04-15 02:29:41,201 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1170 transitions. Word has length 18 [2021-04-15 02:29:41,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:41,201 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 1170 transitions. [2021-04-15 02:29:41,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:41,201 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1170 transitions. [2021-04-15 02:29:41,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:41,202 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:41,202 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:41,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1765 [2021-04-15 02:29:41,402 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:41,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:41,403 INFO L82 PathProgramCache]: Analyzing trace with hash -2020704660, now seen corresponding path program 129 times [2021-04-15 02:29:41,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:41,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135353104] [2021-04-15 02:29:41,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:41,438 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:41,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135353104] [2021-04-15 02:29:41,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797454936] [2021-04-15 02:29:41,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:29:41,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:29:41,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:41,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:41,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:29:41,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:41,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:29:41,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134303230] [2021-04-15 02:29:41,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:41,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:41,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:41,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:41,489 INFO L87 Difference]: Start difference. First operand 408 states and 1170 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:41,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:41,563 INFO L93 Difference]: Finished difference Result 517 states and 1347 transitions. [2021-04-15 02:29:41,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:29:41,563 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:41,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:41,563 INFO L225 Difference]: With dead ends: 517 [2021-04-15 02:29:41,563 INFO L226 Difference]: Without dead ends: 515 [2021-04-15 02:29:41,564 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:29:41,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-04-15 02:29:41,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 394. [2021-04-15 02:29:41,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.8575063613231553) internal successors, (1123), 393 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:41,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1123 transitions. [2021-04-15 02:29:41,568 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1123 transitions. Word has length 18 [2021-04-15 02:29:41,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:41,568 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 1123 transitions. [2021-04-15 02:29:41,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:41,568 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1123 transitions. [2021-04-15 02:29:41,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:41,568 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:41,568 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:41,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1766 [2021-04-15 02:29:41,783 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:41,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:41,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1742252393, now seen corresponding path program 130 times [2021-04-15 02:29:41,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:41,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925117012] [2021-04-15 02:29:41,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:41,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925117012] [2021-04-15 02:29:41,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810447373] [2021-04-15 02:29:41,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:41,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:41,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:41,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:41,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:41,861 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:41,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:41,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:29:41,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574747080] [2021-04-15 02:29:41,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:29:41,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:41,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:29:41,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:41,862 INFO L87 Difference]: Start difference. First operand 394 states and 1123 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:41,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:41,961 INFO L93 Difference]: Finished difference Result 504 states and 1317 transitions. [2021-04-15 02:29:41,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:41,962 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:41,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:41,962 INFO L225 Difference]: With dead ends: 504 [2021-04-15 02:29:41,962 INFO L226 Difference]: Without dead ends: 498 [2021-04-15 02:29:41,962 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:41,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-04-15 02:29:41,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 382. [2021-04-15 02:29:41,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.8451443569553807) internal successors, (1084), 381 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1084 transitions. [2021-04-15 02:29:41,966 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1084 transitions. Word has length 18 [2021-04-15 02:29:41,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:41,966 INFO L480 AbstractCegarLoop]: Abstraction has 382 states and 1084 transitions. [2021-04-15 02:29:41,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:41,966 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1084 transitions. [2021-04-15 02:29:41,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:41,967 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:41,967 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:42,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1767,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:42,167 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:42,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:42,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1833095576, now seen corresponding path program 131 times [2021-04-15 02:29:42,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:42,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104742603] [2021-04-15 02:29:42,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:42,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:42,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104742603] [2021-04-15 02:29:42,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965367754] [2021-04-15 02:29:42,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:42,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:29:42,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:42,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:42,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:42,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:42,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:29:42,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345745488] [2021-04-15 02:29:42,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:29:42,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:42,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:29:42,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:42,300 INFO L87 Difference]: Start difference. First operand 382 states and 1084 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:42,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:42,372 INFO L93 Difference]: Finished difference Result 511 states and 1300 transitions. [2021-04-15 02:29:42,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:29:42,372 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:42,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:42,372 INFO L225 Difference]: With dead ends: 511 [2021-04-15 02:29:42,372 INFO L226 Difference]: Without dead ends: 511 [2021-04-15 02:29:42,373 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:42,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-04-15 02:29:42,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 377. [2021-04-15 02:29:42,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.8324468085106385) internal successors, (1065), 376 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:42,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1065 transitions. [2021-04-15 02:29:42,376 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1065 transitions. Word has length 18 [2021-04-15 02:29:42,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:42,376 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 1065 transitions. [2021-04-15 02:29:42,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:42,376 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1065 transitions. [2021-04-15 02:29:42,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:42,380 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:42,380 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:42,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1768 [2021-04-15 02:29:42,589 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:42,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:42,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1458623315, now seen corresponding path program 132 times [2021-04-15 02:29:42,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:42,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482490083] [2021-04-15 02:29:42,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:42,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:42,629 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:42,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482490083] [2021-04-15 02:29:42,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036720879] [2021-04-15 02:29:42,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:42,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:29:42,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:42,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:42,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:42,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:42,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:29:42,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551415183] [2021-04-15 02:29:42,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:29:42,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:42,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:29:42,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:42,671 INFO L87 Difference]: Start difference. First operand 377 states and 1065 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:42,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:42,752 INFO L93 Difference]: Finished difference Result 521 states and 1359 transitions. [2021-04-15 02:29:42,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:42,752 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:42,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:42,753 INFO L225 Difference]: With dead ends: 521 [2021-04-15 02:29:42,753 INFO L226 Difference]: Without dead ends: 513 [2021-04-15 02:29:42,753 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:42,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-04-15 02:29:42,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 377. [2021-04-15 02:29:42,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.8297872340425534) internal successors, (1064), 376 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:42,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1064 transitions. [2021-04-15 02:29:42,757 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1064 transitions. Word has length 18 [2021-04-15 02:29:42,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:42,757 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 1064 transitions. [2021-04-15 02:29:42,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:42,757 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1064 transitions. [2021-04-15 02:29:42,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:42,757 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:42,757 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:42,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1769,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:42,958 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:42,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:42,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1955525454, now seen corresponding path program 133 times [2021-04-15 02:29:42,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:42,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263600978] [2021-04-15 02:29:42,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:42,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263600978] [2021-04-15 02:29:42,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420378384] [2021-04-15 02:29:42,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:43,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:43,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:43,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:43,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:29:43,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102126684] [2021-04-15 02:29:43,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:29:43,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:43,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:29:43,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:43,042 INFO L87 Difference]: Start difference. First operand 377 states and 1064 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:43,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:43,153 INFO L93 Difference]: Finished difference Result 650 states and 1689 transitions. [2021-04-15 02:29:43,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:29:43,153 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:43,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:43,154 INFO L225 Difference]: With dead ends: 650 [2021-04-15 02:29:43,154 INFO L226 Difference]: Without dead ends: 650 [2021-04-15 02:29:43,154 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:29:43,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-04-15 02:29:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 394. [2021-04-15 02:29:43,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.8066157760814248) internal successors, (1103), 393 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:43,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1103 transitions. [2021-04-15 02:29:43,158 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1103 transitions. Word has length 18 [2021-04-15 02:29:43,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:43,158 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 1103 transitions. [2021-04-15 02:29:43,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:43,158 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1103 transitions. [2021-04-15 02:29:43,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:43,159 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:43,159 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:43,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1770 [2021-04-15 02:29:43,359 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:43,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:43,359 INFO L82 PathProgramCache]: Analyzing trace with hash 175561913, now seen corresponding path program 134 times [2021-04-15 02:29:43,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:43,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793260672] [2021-04-15 02:29:43,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:43,392 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:43,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793260672] [2021-04-15 02:29:43,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666263746] [2021-04-15 02:29:43,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:43,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:43,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:43,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:43,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:43,446 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:43,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:43,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:29:43,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922695709] [2021-04-15 02:29:43,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:43,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:43,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:43,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:43,447 INFO L87 Difference]: Start difference. First operand 394 states and 1103 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:43,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:43,523 INFO L93 Difference]: Finished difference Result 503 states and 1306 transitions. [2021-04-15 02:29:43,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:29:43,523 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:43,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:43,524 INFO L225 Difference]: With dead ends: 503 [2021-04-15 02:29:43,524 INFO L226 Difference]: Without dead ends: 503 [2021-04-15 02:29:43,524 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:29:43,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-04-15 02:29:43,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 398. [2021-04-15 02:29:43,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.808564231738035) internal successors, (1115), 397 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:43,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1115 transitions. [2021-04-15 02:29:43,528 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1115 transitions. Word has length 18 [2021-04-15 02:29:43,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:43,528 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 1115 transitions. [2021-04-15 02:29:43,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:43,528 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1115 transitions. [2021-04-15 02:29:43,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:43,528 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:43,528 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:43,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1771 [2021-04-15 02:29:43,729 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:43,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:43,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1853728120, now seen corresponding path program 135 times [2021-04-15 02:29:43,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:43,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455575980] [2021-04-15 02:29:43,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:43,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455575980] [2021-04-15 02:29:43,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025371309] [2021-04-15 02:29:43,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:43,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:29:43,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:43,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:43,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:43,804 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:43,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:43,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:29:43,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144591235] [2021-04-15 02:29:43,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:43,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:43,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:43,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:43,805 INFO L87 Difference]: Start difference. First operand 398 states and 1115 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:43,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:43,904 INFO L93 Difference]: Finished difference Result 494 states and 1259 transitions. [2021-04-15 02:29:43,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:43,904 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:43,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:43,905 INFO L225 Difference]: With dead ends: 494 [2021-04-15 02:29:43,905 INFO L226 Difference]: Without dead ends: 490 [2021-04-15 02:29:43,905 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:43,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-04-15 02:29:43,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 398. [2021-04-15 02:29:43,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.8060453400503778) internal successors, (1114), 397 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:43,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1114 transitions. [2021-04-15 02:29:43,909 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1114 transitions. Word has length 18 [2021-04-15 02:29:43,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:43,909 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 1114 transitions. [2021-04-15 02:29:43,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:43,909 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1114 transitions. [2021-04-15 02:29:43,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:43,910 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:43,910 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:44,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1772 [2021-04-15 02:29:44,110 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:44,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:44,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1124891415, now seen corresponding path program 136 times [2021-04-15 02:29:44,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:44,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015139309] [2021-04-15 02:29:44,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:44,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:44,149 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:44,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015139309] [2021-04-15 02:29:44,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763983653] [2021-04-15 02:29:44,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:44,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:44,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:44,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:44,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:44,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:44,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:29:44,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500575288] [2021-04-15 02:29:44,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:29:44,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:44,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:29:44,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:44,191 INFO L87 Difference]: Start difference. First operand 398 states and 1114 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:44,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:44,279 INFO L93 Difference]: Finished difference Result 544 states and 1417 transitions. [2021-04-15 02:29:44,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:29:44,280 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:44,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:44,280 INFO L225 Difference]: With dead ends: 544 [2021-04-15 02:29:44,280 INFO L226 Difference]: Without dead ends: 536 [2021-04-15 02:29:44,280 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:44,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-04-15 02:29:44,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 398. [2021-04-15 02:29:44,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.7984886649874054) internal successors, (1111), 397 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:44,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1111 transitions. [2021-04-15 02:29:44,284 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1111 transitions. Word has length 18 [2021-04-15 02:29:44,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:44,284 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 1111 transitions. [2021-04-15 02:29:44,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:44,284 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1111 transitions. [2021-04-15 02:29:44,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:44,285 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:44,285 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:44,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1773,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:44,489 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:44,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:44,489 INFO L82 PathProgramCache]: Analyzing trace with hash 244072888, now seen corresponding path program 137 times [2021-04-15 02:29:44,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:44,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471916416] [2021-04-15 02:29:44,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:44,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:44,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471916416] [2021-04-15 02:29:44,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004718097] [2021-04-15 02:29:44,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:44,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:29:44,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:44,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:44,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:44,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:44,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:29:44,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787026892] [2021-04-15 02:29:44,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:29:44,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:44,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:29:44,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:44,575 INFO L87 Difference]: Start difference. First operand 398 states and 1111 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:44,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:44,677 INFO L93 Difference]: Finished difference Result 600 states and 1559 transitions. [2021-04-15 02:29:44,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:29:44,677 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:44,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:44,678 INFO L225 Difference]: With dead ends: 600 [2021-04-15 02:29:44,678 INFO L226 Difference]: Without dead ends: 600 [2021-04-15 02:29:44,678 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:29:44,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-04-15 02:29:44,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 351. [2021-04-15 02:29:44,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.7857142857142856) internal successors, (975), 350 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:44,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 975 transitions. [2021-04-15 02:29:44,682 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 975 transitions. Word has length 18 [2021-04-15 02:29:44,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:44,682 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 975 transitions. [2021-04-15 02:29:44,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:44,682 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 975 transitions. [2021-04-15 02:29:44,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:44,683 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:44,683 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:44,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1774 [2021-04-15 02:29:44,883 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:44,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:44,884 INFO L82 PathProgramCache]: Analyzing trace with hash 72502491, now seen corresponding path program 138 times [2021-04-15 02:29:44,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:44,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534838754] [2021-04-15 02:29:44,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:44,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534838754] [2021-04-15 02:29:44,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492267705] [2021-04-15 02:29:44,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:44,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:29:44,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:44,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:44,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:44,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:44,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:29:44,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414489225] [2021-04-15 02:29:44,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:44,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:44,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:44,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:44,958 INFO L87 Difference]: Start difference. First operand 351 states and 975 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:44,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:44,996 INFO L93 Difference]: Finished difference Result 535 states and 1322 transitions. [2021-04-15 02:29:44,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:29:44,997 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:44,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:44,997 INFO L225 Difference]: With dead ends: 535 [2021-04-15 02:29:44,997 INFO L226 Difference]: Without dead ends: 535 [2021-04-15 02:29:44,997 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:44,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-04-15 02:29:45,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 363. [2021-04-15 02:29:45,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.820441988950276) internal successors, (1021), 362 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:45,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1021 transitions. [2021-04-15 02:29:45,001 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1021 transitions. Word has length 18 [2021-04-15 02:29:45,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:45,001 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 1021 transitions. [2021-04-15 02:29:45,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:45,001 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1021 transitions. [2021-04-15 02:29:45,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:45,002 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:45,002 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:45,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1775 [2021-04-15 02:29:45,202 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:45,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:45,202 INFO L82 PathProgramCache]: Analyzing trace with hash -704647108, now seen corresponding path program 139 times [2021-04-15 02:29:45,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:45,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909617243] [2021-04-15 02:29:45,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:45,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909617243] [2021-04-15 02:29:45,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025113670] [2021-04-15 02:29:45,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:45,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:45,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:45,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:45,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:29:45,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604729775] [2021-04-15 02:29:45,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:45,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:45,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:45,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:45,276 INFO L87 Difference]: Start difference. First operand 363 states and 1021 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:45,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:45,352 INFO L93 Difference]: Finished difference Result 446 states and 1156 transitions. [2021-04-15 02:29:45,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:29:45,353 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:45,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:45,353 INFO L225 Difference]: With dead ends: 446 [2021-04-15 02:29:45,353 INFO L226 Difference]: Without dead ends: 444 [2021-04-15 02:29:45,353 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:29:45,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-04-15 02:29:45,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 371. [2021-04-15 02:29:45,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.82972972972973) internal successors, (1047), 370 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:45,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1047 transitions. [2021-04-15 02:29:45,357 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1047 transitions. Word has length 18 [2021-04-15 02:29:45,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:45,357 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 1047 transitions. [2021-04-15 02:29:45,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:45,357 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1047 transitions. [2021-04-15 02:29:45,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:45,358 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:45,358 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:45,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1776,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:45,572 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:45,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:45,573 INFO L82 PathProgramCache]: Analyzing trace with hash -163571971, now seen corresponding path program 140 times [2021-04-15 02:29:45,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:45,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073373662] [2021-04-15 02:29:45,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:45,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073373662] [2021-04-15 02:29:45,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825807917] [2021-04-15 02:29:45,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:45,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:45,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:45,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:45,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:45,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:45,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:29:45,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523437522] [2021-04-15 02:29:45,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:45,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:45,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:45,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:45,647 INFO L87 Difference]: Start difference. First operand 371 states and 1047 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:45,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:45,737 INFO L93 Difference]: Finished difference Result 529 states and 1322 transitions. [2021-04-15 02:29:45,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:29:45,737 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:45,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:45,738 INFO L225 Difference]: With dead ends: 529 [2021-04-15 02:29:45,738 INFO L226 Difference]: Without dead ends: 523 [2021-04-15 02:29:45,738 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:45,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-04-15 02:29:45,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 371. [2021-04-15 02:29:45,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.8189189189189188) internal successors, (1043), 370 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:45,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1043 transitions. [2021-04-15 02:29:45,741 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1043 transitions. Word has length 18 [2021-04-15 02:29:45,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:45,742 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 1043 transitions. [2021-04-15 02:29:45,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:45,742 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1043 transitions. [2021-04-15 02:29:45,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:45,742 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:45,742 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:45,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1777 [2021-04-15 02:29:45,949 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:45,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:45,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1054893602, now seen corresponding path program 141 times [2021-04-15 02:29:45,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:45,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831009549] [2021-04-15 02:29:45,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:45,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:45,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831009549] [2021-04-15 02:29:45,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597418027] [2021-04-15 02:29:45,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:29:46,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:29:46,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:46,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:46,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:46,044 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:46,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:46,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:29:46,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920231712] [2021-04-15 02:29:46,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:46,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:46,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:46,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:46,045 INFO L87 Difference]: Start difference. First operand 371 states and 1043 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:46,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:46,102 INFO L93 Difference]: Finished difference Result 464 states and 1205 transitions. [2021-04-15 02:29:46,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:29:46,102 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:46,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:46,102 INFO L225 Difference]: With dead ends: 464 [2021-04-15 02:29:46,103 INFO L226 Difference]: Without dead ends: 464 [2021-04-15 02:29:46,103 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:29:46,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-04-15 02:29:46,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 353. [2021-04-15 02:29:46,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.7954545454545454) internal successors, (984), 352 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:46,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 984 transitions. [2021-04-15 02:29:46,106 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 984 transitions. Word has length 18 [2021-04-15 02:29:46,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:46,106 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 984 transitions. [2021-04-15 02:29:46,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:46,106 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 984 transitions. [2021-04-15 02:29:46,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:46,107 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:46,107 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:46,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1778,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:46,307 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:46,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:46,307 INFO L82 PathProgramCache]: Analyzing trace with hash -142565763, now seen corresponding path program 142 times [2021-04-15 02:29:46,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:46,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22078427] [2021-04-15 02:29:46,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:46,354 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:46,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22078427] [2021-04-15 02:29:46,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084759966] [2021-04-15 02:29:46,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:46,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:46,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:46,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:46,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:46,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:46,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:29:46,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836596205] [2021-04-15 02:29:46,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:29:46,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:46,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:29:46,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:29:46,401 INFO L87 Difference]: Start difference. First operand 353 states and 984 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:46,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:46,519 INFO L93 Difference]: Finished difference Result 494 states and 1235 transitions. [2021-04-15 02:29:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:29:46,520 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:46,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:46,520 INFO L225 Difference]: With dead ends: 494 [2021-04-15 02:29:46,520 INFO L226 Difference]: Without dead ends: 486 [2021-04-15 02:29:46,520 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 86.5ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:29:46,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-04-15 02:29:46,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 359. [2021-04-15 02:29:46,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.776536312849162) internal successors, (994), 358 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:46,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 994 transitions. [2021-04-15 02:29:46,524 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 994 transitions. Word has length 18 [2021-04-15 02:29:46,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:46,524 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 994 transitions. [2021-04-15 02:29:46,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:46,524 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 994 transitions. [2021-04-15 02:29:46,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:46,525 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:46,525 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:46,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1779,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:46,725 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:46,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:46,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1023384290, now seen corresponding path program 143 times [2021-04-15 02:29:46,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:46,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054163992] [2021-04-15 02:29:46,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:46,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054163992] [2021-04-15 02:29:46,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045352515] [2021-04-15 02:29:46,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:46,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:29:46,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:46,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:46,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:46,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:46,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:29:46,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243804441] [2021-04-15 02:29:46,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:29:46,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:46,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:29:46,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:29:46,813 INFO L87 Difference]: Start difference. First operand 359 states and 994 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:46,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:46,902 INFO L93 Difference]: Finished difference Result 473 states and 1180 transitions. [2021-04-15 02:29:46,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:29:46,902 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:46,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:46,902 INFO L225 Difference]: With dead ends: 473 [2021-04-15 02:29:46,902 INFO L226 Difference]: Without dead ends: 473 [2021-04-15 02:29:46,902 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:46,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-04-15 02:29:46,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 306. [2021-04-15 02:29:46,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.7147540983606557) internal successors, (828), 305 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:46,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 828 transitions. [2021-04-15 02:29:46,906 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 828 transitions. Word has length 18 [2021-04-15 02:29:46,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:46,906 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 828 transitions. [2021-04-15 02:29:46,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:46,906 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 828 transitions. [2021-04-15 02:29:46,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:46,906 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:46,906 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:47,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1780,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:47,107 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:47,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:47,107 INFO L82 PathProgramCache]: Analyzing trace with hash -585464903, now seen corresponding path program 144 times [2021-04-15 02:29:47,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:47,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145184910] [2021-04-15 02:29:47,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:47,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145184910] [2021-04-15 02:29:47,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012541966] [2021-04-15 02:29:47,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:47,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:29:47,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:47,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:47,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:47,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:47,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:29:47,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244950691] [2021-04-15 02:29:47,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:29:47,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:47,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:29:47,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:29:47,197 INFO L87 Difference]: Start difference. First operand 306 states and 828 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:47,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:47,280 INFO L93 Difference]: Finished difference Result 550 states and 1344 transitions. [2021-04-15 02:29:47,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:29:47,281 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:47,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:47,281 INFO L225 Difference]: With dead ends: 550 [2021-04-15 02:29:47,281 INFO L226 Difference]: Without dead ends: 540 [2021-04-15 02:29:47,281 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:47,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-04-15 02:29:47,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 317. [2021-04-15 02:29:47,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.6835443037974684) internal successors, (848), 316 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:47,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 848 transitions. [2021-04-15 02:29:47,285 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 848 transitions. Word has length 18 [2021-04-15 02:29:47,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:47,285 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 848 transitions. [2021-04-15 02:29:47,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:47,285 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 848 transitions. [2021-04-15 02:29:47,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:47,285 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:47,285 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:47,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1781 [2021-04-15 02:29:47,486 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:47,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:47,486 INFO L82 PathProgramCache]: Analyzing trace with hash 459750648, now seen corresponding path program 145 times [2021-04-15 02:29:47,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:47,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94289106] [2021-04-15 02:29:47,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:47,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:47,525 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:47,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94289106] [2021-04-15 02:29:47,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697860860] [2021-04-15 02:29:47,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:47,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:47,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:47,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:47,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:29:47,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446730300] [2021-04-15 02:29:47,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:29:47,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:47,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:29:47,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:29:47,577 INFO L87 Difference]: Start difference. First operand 317 states and 848 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:47,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:47,714 INFO L93 Difference]: Finished difference Result 534 states and 1298 transitions. [2021-04-15 02:29:47,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:29:47,715 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:47,715 INFO L225 Difference]: With dead ends: 534 [2021-04-15 02:29:47,715 INFO L226 Difference]: Without dead ends: 534 [2021-04-15 02:29:47,715 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:29:47,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-04-15 02:29:47,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 351. [2021-04-15 02:29:47,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.7085714285714286) internal successors, (948), 350 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:47,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 948 transitions. [2021-04-15 02:29:47,719 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 948 transitions. Word has length 18 [2021-04-15 02:29:47,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:47,719 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 948 transitions. [2021-04-15 02:29:47,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:47,719 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 948 transitions. [2021-04-15 02:29:47,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:47,719 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:47,719 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:47,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1782 [2021-04-15 02:29:47,920 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:47,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:47,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1339860081, now seen corresponding path program 146 times [2021-04-15 02:29:47,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:47,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912662288] [2021-04-15 02:29:47,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:47,956 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:47,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912662288] [2021-04-15 02:29:47,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487086702] [2021-04-15 02:29:47,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:47,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:47,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:47,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:47,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:48,001 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:48,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:48,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:29:48,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140427584] [2021-04-15 02:29:48,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:29:48,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:48,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:29:48,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:48,002 INFO L87 Difference]: Start difference. First operand 351 states and 948 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:48,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:48,069 INFO L93 Difference]: Finished difference Result 539 states and 1303 transitions. [2021-04-15 02:29:48,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:29:48,069 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:48,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:48,070 INFO L225 Difference]: With dead ends: 539 [2021-04-15 02:29:48,070 INFO L226 Difference]: Without dead ends: 539 [2021-04-15 02:29:48,070 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:48,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-04-15 02:29:48,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 380. [2021-04-15 02:29:48,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.7651715039577835) internal successors, (1048), 379 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:48,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1048 transitions. [2021-04-15 02:29:48,074 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1048 transitions. Word has length 18 [2021-04-15 02:29:48,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:48,074 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 1048 transitions. [2021-04-15 02:29:48,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:48,074 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1048 transitions. [2021-04-15 02:29:48,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:48,074 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:48,074 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:48,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1783 [2021-04-15 02:29:48,275 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:48,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:48,275 INFO L82 PathProgramCache]: Analyzing trace with hash 338306126, now seen corresponding path program 147 times [2021-04-15 02:29:48,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:48,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839839907] [2021-04-15 02:29:48,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:48,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839839907] [2021-04-15 02:29:48,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136386246] [2021-04-15 02:29:48,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:48,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:29:48,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:48,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:48,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:48,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:48,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:29:48,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550392387] [2021-04-15 02:29:48,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:29:48,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:48,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:29:48,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:48,367 INFO L87 Difference]: Start difference. First operand 380 states and 1048 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:48,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:48,495 INFO L93 Difference]: Finished difference Result 531 states and 1311 transitions. [2021-04-15 02:29:48,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:29:48,495 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:48,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:48,496 INFO L225 Difference]: With dead ends: 531 [2021-04-15 02:29:48,496 INFO L226 Difference]: Without dead ends: 527 [2021-04-15 02:29:48,496 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:48,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-04-15 02:29:48,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 393. [2021-04-15 02:29:48,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.7933673469387754) internal successors, (1095), 392 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:48,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1095 transitions. [2021-04-15 02:29:48,500 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1095 transitions. Word has length 18 [2021-04-15 02:29:48,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:48,500 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 1095 transitions. [2021-04-15 02:29:48,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:48,500 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1095 transitions. [2021-04-15 02:29:48,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:48,501 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:48,501 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:48,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1784 [2021-04-15 02:29:48,701 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:48,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:48,702 INFO L82 PathProgramCache]: Analyzing trace with hash 879381263, now seen corresponding path program 148 times [2021-04-15 02:29:48,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:48,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363708621] [2021-04-15 02:29:48,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:48,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363708621] [2021-04-15 02:29:48,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264038466] [2021-04-15 02:29:48,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:48,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:48,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:48,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:48,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:48,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:48,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:29:48,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398354516] [2021-04-15 02:29:48,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:48,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:48,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:48,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:48,781 INFO L87 Difference]: Start difference. First operand 393 states and 1095 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:48,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:48,874 INFO L93 Difference]: Finished difference Result 519 states and 1293 transitions. [2021-04-15 02:29:48,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:48,874 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:48,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:48,874 INFO L225 Difference]: With dead ends: 519 [2021-04-15 02:29:48,874 INFO L226 Difference]: Without dead ends: 517 [2021-04-15 02:29:48,875 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:48,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-04-15 02:29:48,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 391. [2021-04-15 02:29:48,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.7974358974358973) internal successors, (1091), 390 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:48,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1091 transitions. [2021-04-15 02:29:48,879 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1091 transitions. Word has length 18 [2021-04-15 02:29:48,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:48,879 INFO L480 AbstractCegarLoop]: Abstraction has 391 states and 1091 transitions. [2021-04-15 02:29:48,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:48,879 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1091 transitions. [2021-04-15 02:29:48,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:48,879 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:48,879 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:49,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1785 [2021-04-15 02:29:49,080 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:49,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:49,080 INFO L82 PathProgramCache]: Analyzing trace with hash -756642866, now seen corresponding path program 149 times [2021-04-15 02:29:49,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:49,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425854656] [2021-04-15 02:29:49,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:49,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425854656] [2021-04-15 02:29:49,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120657778] [2021-04-15 02:29:49,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:49,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:29:49,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:49,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:49,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:49,162 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:49,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:49,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:29:49,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369464635] [2021-04-15 02:29:49,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:49,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:49,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:49,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:49,162 INFO L87 Difference]: Start difference. First operand 391 states and 1091 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:49,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:49,227 INFO L93 Difference]: Finished difference Result 530 states and 1322 transitions. [2021-04-15 02:29:49,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:29:49,228 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:49,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:49,228 INFO L225 Difference]: With dead ends: 530 [2021-04-15 02:29:49,228 INFO L226 Difference]: Without dead ends: 530 [2021-04-15 02:29:49,228 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:29:49,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-04-15 02:29:49,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 392. [2021-04-15 02:29:49,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.78772378516624) internal successors, (1090), 391 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:49,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1090 transitions. [2021-04-15 02:29:49,232 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1090 transitions. Word has length 18 [2021-04-15 02:29:49,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:49,232 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 1090 transitions. [2021-04-15 02:29:49,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:49,232 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1090 transitions. [2021-04-15 02:29:49,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:49,233 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:49,233 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:49,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1786,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:49,433 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:49,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:49,434 INFO L82 PathProgramCache]: Analyzing trace with hash -2100886897, now seen corresponding path program 150 times [2021-04-15 02:29:49,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:49,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479291873] [2021-04-15 02:29:49,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:49,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479291873] [2021-04-15 02:29:49,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685802702] [2021-04-15 02:29:49,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:49,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:29:49,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:49,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:49,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:49,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:49,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:29:49,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629180347] [2021-04-15 02:29:49,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:29:49,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:49,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:29:49,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:29:49,522 INFO L87 Difference]: Start difference. First operand 392 states and 1090 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:49,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:49,617 INFO L93 Difference]: Finished difference Result 597 states and 1517 transitions. [2021-04-15 02:29:49,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:29:49,618 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:49,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:49,618 INFO L225 Difference]: With dead ends: 597 [2021-04-15 02:29:49,618 INFO L226 Difference]: Without dead ends: 587 [2021-04-15 02:29:49,618 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:49,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-04-15 02:29:49,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 392. [2021-04-15 02:29:49,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.785166240409207) internal successors, (1089), 391 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:49,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1089 transitions. [2021-04-15 02:29:49,623 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1089 transitions. Word has length 18 [2021-04-15 02:29:49,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:49,623 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 1089 transitions. [2021-04-15 02:29:49,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:49,623 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1089 transitions. [2021-04-15 02:29:49,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:49,623 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:49,623 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:49,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1787 [2021-04-15 02:29:49,824 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:49,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:49,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1055671346, now seen corresponding path program 151 times [2021-04-15 02:29:49,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:49,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545914559] [2021-04-15 02:29:49,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:49,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545914559] [2021-04-15 02:29:49,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196309533] [2021-04-15 02:29:49,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:49,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:49,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:49,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:49,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:29:49,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219289498] [2021-04-15 02:29:49,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:29:49,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:49,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:29:49,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:29:49,921 INFO L87 Difference]: Start difference. First operand 392 states and 1089 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:50,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:50,063 INFO L93 Difference]: Finished difference Result 529 states and 1361 transitions. [2021-04-15 02:29:50,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:50,064 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:50,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:50,064 INFO L225 Difference]: With dead ends: 529 [2021-04-15 02:29:50,064 INFO L226 Difference]: Without dead ends: 529 [2021-04-15 02:29:50,064 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:29:50,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-04-15 02:29:50,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 385. [2021-04-15 02:29:50,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.78125) internal successors, (1068), 384 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:50,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1068 transitions. [2021-04-15 02:29:50,068 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1068 transitions. Word has length 18 [2021-04-15 02:29:50,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:50,068 INFO L480 AbstractCegarLoop]: Abstraction has 385 states and 1068 transitions. [2021-04-15 02:29:50,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:50,068 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1068 transitions. [2021-04-15 02:29:50,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:50,069 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:50,069 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:50,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1788,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:50,269 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:50,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:50,270 INFO L82 PathProgramCache]: Analyzing trace with hash -2079386357, now seen corresponding path program 152 times [2021-04-15 02:29:50,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:50,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640022622] [2021-04-15 02:29:50,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:50,299 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:50,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640022622] [2021-04-15 02:29:50,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261792043] [2021-04-15 02:29:50,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:50,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:50,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:50,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:50,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:50,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:50,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:29:50,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106758758] [2021-04-15 02:29:50,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:50,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:50,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:50,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:50,346 INFO L87 Difference]: Start difference. First operand 385 states and 1068 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:50,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:50,393 INFO L93 Difference]: Finished difference Result 612 states and 1535 transitions. [2021-04-15 02:29:50,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:29:50,394 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:50,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:50,394 INFO L225 Difference]: With dead ends: 612 [2021-04-15 02:29:50,394 INFO L226 Difference]: Without dead ends: 612 [2021-04-15 02:29:50,394 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:50,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-04-15 02:29:50,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 441. [2021-04-15 02:29:50,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 2.8545454545454545) internal successors, (1256), 440 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:50,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1256 transitions. [2021-04-15 02:29:50,399 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1256 transitions. Word has length 18 [2021-04-15 02:29:50,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:50,399 INFO L480 AbstractCegarLoop]: Abstraction has 441 states and 1256 transitions. [2021-04-15 02:29:50,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:50,399 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1256 transitions. [2021-04-15 02:29:50,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:50,400 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:50,400 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:50,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1789,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:50,602 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:50,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:50,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1438431340, now seen corresponding path program 153 times [2021-04-15 02:29:50,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:50,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134967281] [2021-04-15 02:29:50,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:50,634 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:50,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134967281] [2021-04-15 02:29:50,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527368295] [2021-04-15 02:29:50,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:50,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:29:50,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:50,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:50,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:50,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:50,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:29:50,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357658187] [2021-04-15 02:29:50,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:50,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:50,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:50,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:50,677 INFO L87 Difference]: Start difference. First operand 441 states and 1256 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:50,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:50,769 INFO L93 Difference]: Finished difference Result 564 states and 1468 transitions. [2021-04-15 02:29:50,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:50,770 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:50,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:50,770 INFO L225 Difference]: With dead ends: 564 [2021-04-15 02:29:50,770 INFO L226 Difference]: Without dead ends: 562 [2021-04-15 02:29:50,770 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:50,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-04-15 02:29:50,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 455. [2021-04-15 02:29:50,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.8788546255506606) internal successors, (1307), 454 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:50,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1307 transitions. [2021-04-15 02:29:50,775 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1307 transitions. Word has length 18 [2021-04-15 02:29:50,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:50,775 INFO L480 AbstractCegarLoop]: Abstraction has 455 states and 1307 transitions. [2021-04-15 02:29:50,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:50,775 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1307 transitions. [2021-04-15 02:29:50,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:50,776 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:50,776 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:50,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1790,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:50,976 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:50,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:50,976 INFO L82 PathProgramCache]: Analyzing trace with hash 490101481, now seen corresponding path program 154 times [2021-04-15 02:29:50,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:50,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369843160] [2021-04-15 02:29:50,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:51,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369843160] [2021-04-15 02:29:51,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881275497] [2021-04-15 02:29:51,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:51,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:51,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:51,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:51,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:51,048 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:51,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:51,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:29:51,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100308443] [2021-04-15 02:29:51,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:51,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:51,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:51,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:51,049 INFO L87 Difference]: Start difference. First operand 455 states and 1307 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:51,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:51,137 INFO L93 Difference]: Finished difference Result 609 states and 1555 transitions. [2021-04-15 02:29:51,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:51,137 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:51,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:51,138 INFO L225 Difference]: With dead ends: 609 [2021-04-15 02:29:51,138 INFO L226 Difference]: Without dead ends: 607 [2021-04-15 02:29:51,138 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:51,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-04-15 02:29:51,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 455. [2021-04-15 02:29:51,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.8766519823788546) internal successors, (1306), 454 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:51,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1306 transitions. [2021-04-15 02:29:51,143 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1306 transitions. Word has length 18 [2021-04-15 02:29:51,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:51,143 INFO L480 AbstractCegarLoop]: Abstraction has 455 states and 1306 transitions. [2021-04-15 02:29:51,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:51,143 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1306 transitions. [2021-04-15 02:29:51,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:51,144 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:51,144 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:51,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1791,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:51,357 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:51,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:51,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1145922648, now seen corresponding path program 155 times [2021-04-15 02:29:51,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:51,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152350056] [2021-04-15 02:29:51,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:51,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:51,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152350056] [2021-04-15 02:29:51,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731654983] [2021-04-15 02:29:51,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:51,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:29:51,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:51,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:51,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:51,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:51,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:29:51,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121850916] [2021-04-15 02:29:51,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:51,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:51,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:51,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:51,439 INFO L87 Difference]: Start difference. First operand 455 states and 1306 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:51,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:51,498 INFO L93 Difference]: Finished difference Result 584 states and 1520 transitions. [2021-04-15 02:29:51,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:29:51,499 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:51,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:51,499 INFO L225 Difference]: With dead ends: 584 [2021-04-15 02:29:51,499 INFO L226 Difference]: Without dead ends: 584 [2021-04-15 02:29:51,499 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:29:51,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-04-15 02:29:51,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 459. [2021-04-15 02:29:51,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.8777292576419216) internal successors, (1318), 458 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:51,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1318 transitions. [2021-04-15 02:29:51,504 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1318 transitions. Word has length 18 [2021-04-15 02:29:51,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:51,504 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 1318 transitions. [2021-04-15 02:29:51,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:51,504 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1318 transitions. [2021-04-15 02:29:51,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:51,505 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:51,505 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:51,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1792 [2021-04-15 02:29:51,707 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:51,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:51,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1979506477, now seen corresponding path program 156 times [2021-04-15 02:29:51,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:51,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349853716] [2021-04-15 02:29:51,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:51,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349853716] [2021-04-15 02:29:51,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480845885] [2021-04-15 02:29:51,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:51,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:29:51,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:51,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:51,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:51,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:51,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:29:51,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834206065] [2021-04-15 02:29:51,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:51,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:51,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:51,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:51,780 INFO L87 Difference]: Start difference. First operand 459 states and 1318 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:51,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:51,860 INFO L93 Difference]: Finished difference Result 652 states and 1678 transitions. [2021-04-15 02:29:51,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:29:51,860 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:51,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:51,861 INFO L225 Difference]: With dead ends: 652 [2021-04-15 02:29:51,861 INFO L226 Difference]: Without dead ends: 648 [2021-04-15 02:29:51,861 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:51,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-04-15 02:29:51,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 459. [2021-04-15 02:29:51,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.8755458515283845) internal successors, (1317), 458 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:51,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1317 transitions. [2021-04-15 02:29:51,866 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1317 transitions. Word has length 18 [2021-04-15 02:29:51,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:51,866 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 1317 transitions. [2021-04-15 02:29:51,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:51,866 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1317 transitions. [2021-04-15 02:29:51,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:51,866 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:51,866 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:52,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1793 [2021-04-15 02:29:52,067 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:52,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:52,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1088184846, now seen corresponding path program 157 times [2021-04-15 02:29:52,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:52,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743509117] [2021-04-15 02:29:52,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:52,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743509117] [2021-04-15 02:29:52,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278276630] [2021-04-15 02:29:52,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:52,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:52,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:52,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:52,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:52,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:29:52,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143504360] [2021-04-15 02:29:52,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:52,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:52,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:52,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:52,156 INFO L87 Difference]: Start difference. First operand 459 states and 1317 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:52,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:52,225 INFO L93 Difference]: Finished difference Result 559 states and 1507 transitions. [2021-04-15 02:29:52,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:29:52,226 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:52,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:52,226 INFO L225 Difference]: With dead ends: 559 [2021-04-15 02:29:52,226 INFO L226 Difference]: Without dead ends: 559 [2021-04-15 02:29:52,227 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:52,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-04-15 02:29:52,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 471. [2021-04-15 02:29:52,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.882978723404255) internal successors, (1355), 470 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:52,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1355 transitions. [2021-04-15 02:29:52,231 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1355 transitions. Word has length 18 [2021-04-15 02:29:52,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:52,231 INFO L480 AbstractCegarLoop]: Abstraction has 471 states and 1355 transitions. [2021-04-15 02:29:52,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:52,231 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1355 transitions. [2021-04-15 02:29:52,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:52,232 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:52,232 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:52,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1794,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:52,432 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:52,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:52,432 INFO L82 PathProgramCache]: Analyzing trace with hash 906421097, now seen corresponding path program 158 times [2021-04-15 02:29:52,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:52,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814416227] [2021-04-15 02:29:52,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:52,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:52,464 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:52,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814416227] [2021-04-15 02:29:52,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204468398] [2021-04-15 02:29:52,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:52,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:52,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:52,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:52,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:52,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:52,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:29:52,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834338732] [2021-04-15 02:29:52,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:29:52,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:52,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:29:52,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:52,512 INFO L87 Difference]: Start difference. First operand 471 states and 1355 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:52,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:52,604 INFO L93 Difference]: Finished difference Result 682 states and 1750 transitions. [2021-04-15 02:29:52,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:52,605 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:52,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:52,605 INFO L225 Difference]: With dead ends: 682 [2021-04-15 02:29:52,605 INFO L226 Difference]: Without dead ends: 676 [2021-04-15 02:29:52,605 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:52,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-04-15 02:29:52,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 482. [2021-04-15 02:29:52,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.9022869022869022) internal successors, (1396), 481 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:52,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1396 transitions. [2021-04-15 02:29:52,611 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1396 transitions. Word has length 18 [2021-04-15 02:29:52,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:52,611 INFO L480 AbstractCegarLoop]: Abstraction has 482 states and 1396 transitions. [2021-04-15 02:29:52,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:52,611 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1396 transitions. [2021-04-15 02:29:52,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:52,611 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:52,611 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:52,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1795 [2021-04-15 02:29:52,812 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:52,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:52,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1626040424, now seen corresponding path program 159 times [2021-04-15 02:29:52,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:52,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363252316] [2021-04-15 02:29:52,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:52,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363252316] [2021-04-15 02:29:52,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231170898] [2021-04-15 02:29:52,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:52,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:29:52,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:52,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:52,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:52,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:52,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:29:52,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81798387] [2021-04-15 02:29:52,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:29:52,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:52,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:29:52,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:52,904 INFO L87 Difference]: Start difference. First operand 482 states and 1396 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:52,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:52,983 INFO L93 Difference]: Finished difference Result 581 states and 1569 transitions. [2021-04-15 02:29:52,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:29:52,983 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:52,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:52,984 INFO L225 Difference]: With dead ends: 581 [2021-04-15 02:29:52,984 INFO L226 Difference]: Without dead ends: 579 [2021-04-15 02:29:52,984 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:52,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-04-15 02:29:52,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 483. [2021-04-15 02:29:52,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.9024896265560165) internal successors, (1399), 482 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:52,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1399 transitions. [2021-04-15 02:29:52,989 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1399 transitions. Word has length 18 [2021-04-15 02:29:52,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:52,989 INFO L480 AbstractCegarLoop]: Abstraction has 483 states and 1399 transitions. [2021-04-15 02:29:52,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:52,989 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1399 transitions. [2021-04-15 02:29:52,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:52,989 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:52,989 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:53,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1796 [2021-04-15 02:29:53,193 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:53,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:53,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1119694158, now seen corresponding path program 160 times [2021-04-15 02:29:53,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:53,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114781817] [2021-04-15 02:29:53,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:53,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:53,227 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:53,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114781817] [2021-04-15 02:29:53,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484146849] [2021-04-15 02:29:53,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:53,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:53,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:53,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:53,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:53,277 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:53,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:53,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:29:53,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260335020] [2021-04-15 02:29:53,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:29:53,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:53,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:29:53,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:53,277 INFO L87 Difference]: Start difference. First operand 483 states and 1399 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:53,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:53,333 INFO L93 Difference]: Finished difference Result 540 states and 1521 transitions. [2021-04-15 02:29:53,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:29:53,334 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:53,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:53,334 INFO L225 Difference]: With dead ends: 540 [2021-04-15 02:29:53,334 INFO L226 Difference]: Without dead ends: 540 [2021-04-15 02:29:53,334 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:53,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-04-15 02:29:53,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 503. [2021-04-15 02:29:53,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.902390438247012) internal successors, (1457), 502 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:53,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1457 transitions. [2021-04-15 02:29:53,339 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1457 transitions. Word has length 18 [2021-04-15 02:29:53,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:53,339 INFO L480 AbstractCegarLoop]: Abstraction has 503 states and 1457 transitions. [2021-04-15 02:29:53,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:53,339 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1457 transitions. [2021-04-15 02:29:53,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:53,340 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:53,340 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:53,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1797 [2021-04-15 02:29:53,540 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:53,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:53,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1557613545, now seen corresponding path program 161 times [2021-04-15 02:29:53,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:53,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990914911] [2021-04-15 02:29:53,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:53,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990914911] [2021-04-15 02:29:53,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115089420] [2021-04-15 02:29:53,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:53,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:29:53,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:53,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:53,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:53,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:53,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:29:53,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350090646] [2021-04-15 02:29:53,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:29:53,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:53,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:29:53,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:29:53,627 INFO L87 Difference]: Start difference. First operand 503 states and 1457 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:53,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:53,734 INFO L93 Difference]: Finished difference Result 774 states and 2053 transitions. [2021-04-15 02:29:53,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:53,735 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:53,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:53,735 INFO L225 Difference]: With dead ends: 774 [2021-04-15 02:29:53,735 INFO L226 Difference]: Without dead ends: 764 [2021-04-15 02:29:53,735 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:29:53,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-04-15 02:29:53,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 506. [2021-04-15 02:29:53,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.899009900990099) internal successors, (1464), 505 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:53,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1464 transitions. [2021-04-15 02:29:53,740 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1464 transitions. Word has length 18 [2021-04-15 02:29:53,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:53,741 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1464 transitions. [2021-04-15 02:29:53,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:53,741 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1464 transitions. [2021-04-15 02:29:53,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:53,741 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:53,741 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:53,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1798,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:53,942 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:53,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:53,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1692138200, now seen corresponding path program 162 times [2021-04-15 02:29:53,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:53,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555605533] [2021-04-15 02:29:53,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:53,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555605533] [2021-04-15 02:29:53,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35320123] [2021-04-15 02:29:53,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:54,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:29:54,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:54,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:54,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:54,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:54,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:29:54,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501225910] [2021-04-15 02:29:54,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:29:54,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:54,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:29:54,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:29:54,038 INFO L87 Difference]: Start difference. First operand 506 states and 1464 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:54,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:54,142 INFO L93 Difference]: Finished difference Result 573 states and 1584 transitions. [2021-04-15 02:29:54,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:29:54,142 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:54,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:54,143 INFO L225 Difference]: With dead ends: 573 [2021-04-15 02:29:54,143 INFO L226 Difference]: Without dead ends: 573 [2021-04-15 02:29:54,143 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:29:54,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-04-15 02:29:54,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 506. [2021-04-15 02:29:54,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.899009900990099) internal successors, (1464), 505 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:54,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1464 transitions. [2021-04-15 02:29:54,148 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1464 transitions. Word has length 18 [2021-04-15 02:29:54,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:54,148 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1464 transitions. [2021-04-15 02:29:54,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:54,148 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1464 transitions. [2021-04-15 02:29:54,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:54,148 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:54,148 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:54,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1799 [2021-04-15 02:29:54,349 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:54,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:54,349 INFO L82 PathProgramCache]: Analyzing trace with hash 712642093, now seen corresponding path program 163 times [2021-04-15 02:29:54,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:54,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128118741] [2021-04-15 02:29:54,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:54,391 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:54,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128118741] [2021-04-15 02:29:54,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956959968] [2021-04-15 02:29:54,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:54,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:54,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:54,445 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:54,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:54,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:29:54,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633626728] [2021-04-15 02:29:54,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:29:54,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:54,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:29:54,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:29:54,446 INFO L87 Difference]: Start difference. First operand 506 states and 1464 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:54,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:54,503 INFO L93 Difference]: Finished difference Result 683 states and 1838 transitions. [2021-04-15 02:29:54,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:29:54,503 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:54,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:54,504 INFO L225 Difference]: With dead ends: 683 [2021-04-15 02:29:54,504 INFO L226 Difference]: Without dead ends: 671 [2021-04-15 02:29:54,504 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:54,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-04-15 02:29:54,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 504. [2021-04-15 02:29:54,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.9025844930417497) internal successors, (1460), 503 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:54,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1460 transitions. [2021-04-15 02:29:54,509 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1460 transitions. Word has length 18 [2021-04-15 02:29:54,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:54,509 INFO L480 AbstractCegarLoop]: Abstraction has 504 states and 1460 transitions. [2021-04-15 02:29:54,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:54,509 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1460 transitions. [2021-04-15 02:29:54,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:29:54,510 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:54,510 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:54,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1800,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:54,710 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:54,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:54,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1335371918, now seen corresponding path program 164 times [2021-04-15 02:29:54,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:54,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605616003] [2021-04-15 02:29:54,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:54,760 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:54,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605616003] [2021-04-15 02:29:54,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794160303] [2021-04-15 02:29:54,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:54,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:54,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:54,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:29:54,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:54,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:54,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:29:54,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702944119] [2021-04-15 02:29:54,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:29:54,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:54,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:29:54,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:29:54,813 INFO L87 Difference]: Start difference. First operand 504 states and 1460 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:54,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:54,942 INFO L93 Difference]: Finished difference Result 652 states and 1786 transitions. [2021-04-15 02:29:54,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:29:54,942 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:29:54,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:54,943 INFO L225 Difference]: With dead ends: 652 [2021-04-15 02:29:54,943 INFO L226 Difference]: Without dead ends: 652 [2021-04-15 02:29:54,943 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:29:54,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-04-15 02:29:54,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 525. [2021-04-15 02:29:54,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.895038167938931) internal successors, (1517), 524 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:54,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1517 transitions. [2021-04-15 02:29:54,948 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1517 transitions. Word has length 18 [2021-04-15 02:29:54,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:54,948 INFO L480 AbstractCegarLoop]: Abstraction has 525 states and 1517 transitions. [2021-04-15 02:29:54,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:54,948 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1517 transitions. [2021-04-15 02:29:54,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:29:54,948 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:54,948 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:55,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1801 [2021-04-15 02:29:55,149 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:55,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:55,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1154319608, now seen corresponding path program 165 times [2021-04-15 02:29:55,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:55,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582206455] [2021-04-15 02:29:55,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:55,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:55,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582206455] [2021-04-15 02:29:55,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017805992] [2021-04-15 02:29:55,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:55,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:29:55,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:55,271 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:29:55,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:55,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:55,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:29:55,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:55,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:55,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:55,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:29:55,693 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:55,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:55,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:29:55,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564562648] [2021-04-15 02:29:55,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:29:55,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:55,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:29:55,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:29:55,694 INFO L87 Difference]: Start difference. First operand 525 states and 1517 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:56,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:56,036 INFO L93 Difference]: Finished difference Result 604 states and 1671 transitions. [2021-04-15 02:29:56,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:29:56,036 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:29:56,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:56,037 INFO L225 Difference]: With dead ends: 604 [2021-04-15 02:29:56,037 INFO L226 Difference]: Without dead ends: 571 [2021-04-15 02:29:56,037 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 389.2ms TimeCoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:29:56,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-04-15 02:29:56,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 540. [2021-04-15 02:29:56,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 2.8923933209647497) internal successors, (1559), 539 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:56,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1559 transitions. [2021-04-15 02:29:56,041 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1559 transitions. Word has length 19 [2021-04-15 02:29:56,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:56,041 INFO L480 AbstractCegarLoop]: Abstraction has 540 states and 1559 transitions. [2021-04-15 02:29:56,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:56,042 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1559 transitions. [2021-04-15 02:29:56,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:29:56,042 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:56,042 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:56,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1802,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:56,242 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:56,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:56,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1640517070, now seen corresponding path program 166 times [2021-04-15 02:29:56,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:56,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935437214] [2021-04-15 02:29:56,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:56,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935437214] [2021-04-15 02:29:56,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462544681] [2021-04-15 02:29:56,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:56,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:56,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:56,347 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:29:56,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:56,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:56,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:29:56,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:56,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:56,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:56,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:29:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:56,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:56,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:29:56,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175906067] [2021-04-15 02:29:56,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:29:56,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:56,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:29:56,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:29:56,696 INFO L87 Difference]: Start difference. First operand 540 states and 1559 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:56,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:56,975 INFO L93 Difference]: Finished difference Result 625 states and 1734 transitions. [2021-04-15 02:29:56,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:29:56,976 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:29:56,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:56,977 INFO L225 Difference]: With dead ends: 625 [2021-04-15 02:29:56,977 INFO L226 Difference]: Without dead ends: 609 [2021-04-15 02:29:56,977 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 272.3ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:29:56,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-04-15 02:29:56,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 556. [2021-04-15 02:29:56,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.908108108108108) internal successors, (1614), 555 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:56,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1614 transitions. [2021-04-15 02:29:56,982 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1614 transitions. Word has length 19 [2021-04-15 02:29:56,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:56,982 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 1614 transitions. [2021-04-15 02:29:56,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:56,982 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1614 transitions. [2021-04-15 02:29:56,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:29:56,983 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:56,983 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:57,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1900 [2021-04-15 02:29:57,183 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:57,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:57,183 INFO L82 PathProgramCache]: Analyzing trace with hash -781642540, now seen corresponding path program 167 times [2021-04-15 02:29:57,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:57,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419183431] [2021-04-15 02:29:57,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:57,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419183431] [2021-04-15 02:29:57,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992468087] [2021-04-15 02:29:57,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:57,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:29:57,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:57,279 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:29:57,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:57,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:57,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:29:57,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:57,735 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:29:57,736 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:29:57,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:29:57,828 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:29:57,843 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:29:57,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:57,843 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:29:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:57,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:57,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:29:57,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012432331] [2021-04-15 02:29:57,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:29:57,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:57,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:29:57,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:29:57,871 INFO L87 Difference]: Start difference. First operand 556 states and 1614 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:58,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:58,233 INFO L93 Difference]: Finished difference Result 644 states and 1778 transitions. [2021-04-15 02:29:58,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:29:58,233 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:29:58,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:58,234 INFO L225 Difference]: With dead ends: 644 [2021-04-15 02:29:58,234 INFO L226 Difference]: Without dead ends: 634 [2021-04-15 02:29:58,234 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 278.7ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:29:58,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-04-15 02:29:58,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 556. [2021-04-15 02:29:58,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.908108108108108) internal successors, (1614), 555 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:58,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1614 transitions. [2021-04-15 02:29:58,240 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1614 transitions. Word has length 19 [2021-04-15 02:29:58,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:58,240 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 1614 transitions. [2021-04-15 02:29:58,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:58,240 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1614 transitions. [2021-04-15 02:29:58,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:29:58,240 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:58,240 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:58,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1962,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:58,455 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:58,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:58,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1146496824, now seen corresponding path program 168 times [2021-04-15 02:29:58,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:58,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117762601] [2021-04-15 02:29:58,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:58,534 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:58,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117762601] [2021-04-15 02:29:58,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720901855] [2021-04-15 02:29:58,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:58,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:29:58,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:58,553 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:29:58,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:58,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:58,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:29:58,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:58,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:58,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:58,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:29:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:58,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:58,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:29:58,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780550572] [2021-04-15 02:29:58,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:29:58,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:58,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:29:58,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:29:58,886 INFO L87 Difference]: Start difference. First operand 556 states and 1614 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:59,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:59,166 INFO L93 Difference]: Finished difference Result 654 states and 1848 transitions. [2021-04-15 02:29:59,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:29:59,167 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:29:59,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:59,167 INFO L225 Difference]: With dead ends: 654 [2021-04-15 02:29:59,167 INFO L226 Difference]: Without dead ends: 638 [2021-04-15 02:29:59,168 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 275.5ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:29:59,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-04-15 02:29:59,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 585. [2021-04-15 02:29:59,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.9366438356164384) internal successors, (1715), 584 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:59,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1715 transitions. [2021-04-15 02:29:59,173 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1715 transitions. Word has length 19 [2021-04-15 02:29:59,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:59,173 INFO L480 AbstractCegarLoop]: Abstraction has 585 states and 1715 transitions. [2021-04-15 02:29:59,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:59,173 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1715 transitions. [2021-04-15 02:29:59,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:29:59,174 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:59,174 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:59,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2080 [2021-04-15 02:29:59,374 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:59,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:59,374 INFO L82 PathProgramCache]: Analyzing trace with hash -287622294, now seen corresponding path program 169 times [2021-04-15 02:29:59,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:59,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958580159] [2021-04-15 02:29:59,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:59,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958580159] [2021-04-15 02:29:59,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228056461] [2021-04-15 02:29:59,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:59,468 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:29:59,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:59,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:59,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:29:59,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:59,956 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:29:59,956 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:29:59,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:00,027 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:00,042 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:00,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:00,043 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:00,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:00,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:30:00,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808067302] [2021-04-15 02:30:00,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:00,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:00,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:00,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:00,071 INFO L87 Difference]: Start difference. First operand 585 states and 1715 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:00,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:00,493 INFO L93 Difference]: Finished difference Result 690 states and 1918 transitions. [2021-04-15 02:30:00,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:30:00,493 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:00,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:00,494 INFO L225 Difference]: With dead ends: 690 [2021-04-15 02:30:00,494 INFO L226 Difference]: Without dead ends: 671 [2021-04-15 02:30:00,494 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 325.7ms TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:30:00,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-04-15 02:30:00,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 583. [2021-04-15 02:30:00,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.929553264604811) internal successors, (1705), 582 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:00,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1705 transitions. [2021-04-15 02:30:00,500 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1705 transitions. Word has length 19 [2021-04-15 02:30:00,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:00,500 INFO L480 AbstractCegarLoop]: Abstraction has 583 states and 1705 transitions. [2021-04-15 02:30:00,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:00,500 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1705 transitions. [2021-04-15 02:30:00,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:00,501 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:00,501 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:00,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2128,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:00,701 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:00,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:00,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1422991014, now seen corresponding path program 170 times [2021-04-15 02:30:00,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:00,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781329856] [2021-04-15 02:30:00,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:00,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781329856] [2021-04-15 02:30:00,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925940672] [2021-04-15 02:30:00,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:00,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:00,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:00,804 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:00,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:01,061 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:01,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:01,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:01,269 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:01,269 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:01,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:01,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:01,363 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:01,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:01,364 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:01,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:01,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:30:01,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47885975] [2021-04-15 02:30:01,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:01,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:01,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:01,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:01,392 INFO L87 Difference]: Start difference. First operand 583 states and 1705 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:01,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:01,819 INFO L93 Difference]: Finished difference Result 643 states and 1827 transitions. [2021-04-15 02:30:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:30:01,819 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:01,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:01,820 INFO L225 Difference]: With dead ends: 643 [2021-04-15 02:30:01,821 INFO L226 Difference]: Without dead ends: 633 [2021-04-15 02:30:01,821 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 356.4ms TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:30:01,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-04-15 02:30:01,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 585. [2021-04-15 02:30:01,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.9297945205479454) internal successors, (1711), 584 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:01,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1711 transitions. [2021-04-15 02:30:01,828 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1711 transitions. Word has length 19 [2021-04-15 02:30:01,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:01,828 INFO L480 AbstractCegarLoop]: Abstraction has 585 states and 1711 transitions. [2021-04-15 02:30:01,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:01,828 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1711 transitions. [2021-04-15 02:30:01,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:01,828 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:01,828 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:02,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2225 [2021-04-15 02:30:02,029 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:02,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:02,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1095619830, now seen corresponding path program 171 times [2021-04-15 02:30:02,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:02,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903984396] [2021-04-15 02:30:02,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:30:02,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903984396] [2021-04-15 02:30:02,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940525041] [2021-04-15 02:30:02,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:02,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:30:02,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:02,116 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:02,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:02,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:02,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:02,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:02,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:02,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:30:02,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:30:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:02,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:02,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-04-15 02:30:02,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75742236] [2021-04-15 02:30:02,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:30:02,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:02,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:30:02,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:02,512 INFO L87 Difference]: Start difference. First operand 585 states and 1711 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:02,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:02,707 INFO L93 Difference]: Finished difference Result 619 states and 1761 transitions. [2021-04-15 02:30:02,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:30:02,708 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:02,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:02,708 INFO L225 Difference]: With dead ends: 619 [2021-04-15 02:30:02,708 INFO L226 Difference]: Without dead ends: 601 [2021-04-15 02:30:02,708 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 289.9ms TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:30:02,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-04-15 02:30:02,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 585. [2021-04-15 02:30:02,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.9263698630136985) internal successors, (1709), 584 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:02,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1709 transitions. [2021-04-15 02:30:02,714 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1709 transitions. Word has length 19 [2021-04-15 02:30:02,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:02,714 INFO L480 AbstractCegarLoop]: Abstraction has 585 states and 1709 transitions. [2021-04-15 02:30:02,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:02,714 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1709 transitions. [2021-04-15 02:30:02,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:02,714 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:02,714 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:02,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2316 [2021-04-15 02:30:02,918 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:02,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:02,919 INFO L82 PathProgramCache]: Analyzing trace with hash -980106122, now seen corresponding path program 172 times [2021-04-15 02:30:02,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:02,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428796203] [2021-04-15 02:30:02,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:03,000 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:03,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428796203] [2021-04-15 02:30:03,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153728829] [2021-04-15 02:30:03,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:03,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:03,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:03,027 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:03,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:03,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:03,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:03,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:03,559 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:03,560 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:03,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:03,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:03,718 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:03,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:03,719 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:03,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:03,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:30:03,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602525436] [2021-04-15 02:30:03,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:03,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:03,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:03,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:03,746 INFO L87 Difference]: Start difference. First operand 585 states and 1709 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:04,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:04,206 INFO L93 Difference]: Finished difference Result 693 states and 1917 transitions. [2021-04-15 02:30:04,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:30:04,207 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:04,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:04,208 INFO L225 Difference]: With dead ends: 693 [2021-04-15 02:30:04,208 INFO L226 Difference]: Without dead ends: 683 [2021-04-15 02:30:04,208 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 363.0ms TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:30:04,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-04-15 02:30:04,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 588. [2021-04-15 02:30:04,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.9165247018739353) internal successors, (1712), 587 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:04,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1712 transitions. [2021-04-15 02:30:04,214 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1712 transitions. Word has length 19 [2021-04-15 02:30:04,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:04,214 INFO L480 AbstractCegarLoop]: Abstraction has 588 states and 1712 transitions. [2021-04-15 02:30:04,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:04,214 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1712 transitions. [2021-04-15 02:30:04,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:04,215 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:04,215 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:04,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2393,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:04,415 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:04,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:04,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1283228914, now seen corresponding path program 173 times [2021-04-15 02:30:04,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:04,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155696658] [2021-04-15 02:30:04,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:04,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155696658] [2021-04-15 02:30:04,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852963949] [2021-04-15 02:30:04,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:04,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:30:04,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:04,554 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:04,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:04,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:04,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:04,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:04,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:04,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:30:04,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:30:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:05,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:05,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:30:05,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131100878] [2021-04-15 02:30:05,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:05,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:05,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:05,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:05,008 INFO L87 Difference]: Start difference. First operand 588 states and 1712 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:05,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:05,281 INFO L93 Difference]: Finished difference Result 698 states and 1984 transitions. [2021-04-15 02:30:05,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:30:05,282 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:05,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:05,283 INFO L225 Difference]: With dead ends: 698 [2021-04-15 02:30:05,283 INFO L226 Difference]: Without dead ends: 680 [2021-04-15 02:30:05,283 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 348.2ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:30:05,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-04-15 02:30:05,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 625. [2021-04-15 02:30:05,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.948717948717949) internal successors, (1840), 624 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:05,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1840 transitions. [2021-04-15 02:30:05,289 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1840 transitions. Word has length 19 [2021-04-15 02:30:05,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:05,289 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 1840 transitions. [2021-04-15 02:30:05,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:05,289 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1840 transitions. [2021-04-15 02:30:05,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:05,289 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:05,290 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:05,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2527 [2021-04-15 02:30:05,490 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:05,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:05,490 INFO L82 PathProgramCache]: Analyzing trace with hash 2142103444, now seen corresponding path program 174 times [2021-04-15 02:30:05,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:05,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904371270] [2021-04-15 02:30:05,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:05,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904371270] [2021-04-15 02:30:05,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905569060] [2021-04-15 02:30:05,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:05,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:30:05,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:05,602 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:05,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:05,881 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:05,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:05,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:06,119 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:06,119 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:06,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:06,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:06,239 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:06,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:06,239 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:06,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:06,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:30:06,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580325696] [2021-04-15 02:30:06,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:06,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:06,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:06,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:06,269 INFO L87 Difference]: Start difference. First operand 625 states and 1840 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:06,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:06,882 INFO L93 Difference]: Finished difference Result 768 states and 2131 transitions. [2021-04-15 02:30:06,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:30:06,883 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:06,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:06,883 INFO L225 Difference]: With dead ends: 768 [2021-04-15 02:30:06,884 INFO L226 Difference]: Without dead ends: 742 [2021-04-15 02:30:06,884 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 474.8ms TimeCoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:30:06,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-04-15 02:30:06,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 627. [2021-04-15 02:30:06,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 2.9472843450479234) internal successors, (1845), 626 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:06,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1845 transitions. [2021-04-15 02:30:06,890 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1845 transitions. Word has length 19 [2021-04-15 02:30:06,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:06,890 INFO L480 AbstractCegarLoop]: Abstraction has 627 states and 1845 transitions. [2021-04-15 02:30:06,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:06,890 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1845 transitions. [2021-04-15 02:30:06,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:06,890 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:06,890 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:07,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2595 [2021-04-15 02:30:07,091 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:07,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:07,091 INFO L82 PathProgramCache]: Analyzing trace with hash -442250544, now seen corresponding path program 175 times [2021-04-15 02:30:07,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:07,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373436428] [2021-04-15 02:30:07,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:07,176 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:07,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373436428] [2021-04-15 02:30:07,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226018565] [2021-04-15 02:30:07,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:07,193 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:07,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:07,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:07,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:07,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:07,723 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:07,723 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:07,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:07,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:07,894 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:07,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:07,895 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:07,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:07,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:30:07,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849375529] [2021-04-15 02:30:07,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:30:07,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:07,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:30:07,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:30:07,923 INFO L87 Difference]: Start difference. First operand 627 states and 1845 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:08,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:08,587 INFO L93 Difference]: Finished difference Result 816 states and 2235 transitions. [2021-04-15 02:30:08,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:30:08,588 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:08,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:08,588 INFO L225 Difference]: With dead ends: 816 [2021-04-15 02:30:08,589 INFO L226 Difference]: Without dead ends: 783 [2021-04-15 02:30:08,589 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 462.9ms TimeCoverageRelationStatistics Valid=180, Invalid=1152, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:30:08,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-04-15 02:30:08,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 619. [2021-04-15 02:30:08,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 2.9352750809061487) internal successors, (1814), 618 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:08,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1814 transitions. [2021-04-15 02:30:08,595 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1814 transitions. Word has length 19 [2021-04-15 02:30:08,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:08,595 INFO L480 AbstractCegarLoop]: Abstraction has 619 states and 1814 transitions. [2021-04-15 02:30:08,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:08,595 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1814 transitions. [2021-04-15 02:30:08,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:08,596 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:08,596 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:08,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2707,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:08,796 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:08,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:08,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1047154452, now seen corresponding path program 176 times [2021-04-15 02:30:08,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:08,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022691609] [2021-04-15 02:30:08,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:08,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:08,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022691609] [2021-04-15 02:30:08,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484270709] [2021-04-15 02:30:08,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:08,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:08,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:08,906 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:08,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:09,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:09,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:09,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:09,420 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:09,420 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:09,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:09,495 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:09,511 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:09,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:09,512 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:09,557 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:09,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:09,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:30:09,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246139093] [2021-04-15 02:30:09,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:30:09,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:09,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:30:09,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:30:09,558 INFO L87 Difference]: Start difference. First operand 619 states and 1814 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:09,965 INFO L93 Difference]: Finished difference Result 731 states and 2045 transitions. [2021-04-15 02:30:09,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:30:09,965 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:09,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:09,966 INFO L225 Difference]: With dead ends: 731 [2021-04-15 02:30:09,966 INFO L226 Difference]: Without dead ends: 721 [2021-04-15 02:30:09,966 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 444.4ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:30:09,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-04-15 02:30:09,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 621. [2021-04-15 02:30:09,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 2.935483870967742) internal successors, (1820), 620 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:09,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1820 transitions. [2021-04-15 02:30:09,972 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1820 transitions. Word has length 19 [2021-04-15 02:30:09,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:09,972 INFO L480 AbstractCegarLoop]: Abstraction has 621 states and 1820 transitions. [2021-04-15 02:30:09,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:09,972 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1820 transitions. [2021-04-15 02:30:09,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:09,973 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:09,973 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:10,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2861 [2021-04-15 02:30:10,173 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:10,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:10,173 INFO L82 PathProgramCache]: Analyzing trace with hash -385947354, now seen corresponding path program 177 times [2021-04-15 02:30:10,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:10,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24390726] [2021-04-15 02:30:10,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:10,244 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:30:10,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24390726] [2021-04-15 02:30:10,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543368870] [2021-04-15 02:30:10,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:10,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:30:10,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:10,272 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:10,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:10,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:10,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:10,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:10,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:10,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:30:10,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:30:10,611 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:10,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:10,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-04-15 02:30:10,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761163013] [2021-04-15 02:30:10,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:30:10,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:10,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:30:10,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:10,612 INFO L87 Difference]: Start difference. First operand 621 states and 1820 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:10,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:10,844 INFO L93 Difference]: Finished difference Result 649 states and 1861 transitions. [2021-04-15 02:30:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:30:10,844 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:10,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:10,845 INFO L225 Difference]: With dead ends: 649 [2021-04-15 02:30:10,845 INFO L226 Difference]: Without dead ends: 631 [2021-04-15 02:30:10,845 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 290.0ms TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:30:10,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-04-15 02:30:10,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 621. [2021-04-15 02:30:10,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 2.9338709677419357) internal successors, (1819), 620 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:10,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1819 transitions. [2021-04-15 02:30:10,851 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1819 transitions. Word has length 19 [2021-04-15 02:30:10,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:10,851 INFO L480 AbstractCegarLoop]: Abstraction has 621 states and 1819 transitions. [2021-04-15 02:30:10,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:10,851 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1819 transitions. [2021-04-15 02:30:10,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:10,852 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:10,852 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:11,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2966,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:11,052 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:11,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:11,053 INFO L82 PathProgramCache]: Analyzing trace with hash -434412732, now seen corresponding path program 178 times [2021-04-15 02:30:11,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:11,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600742110] [2021-04-15 02:30:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:11,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600742110] [2021-04-15 02:30:11,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163670101] [2021-04-15 02:30:11,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:11,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:11,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:11,167 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:11,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:11,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:11,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:11,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:11,670 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:11,670 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:11,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:11,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:11,825 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:11,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:11,826 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:11,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:11,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:30:11,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787209998] [2021-04-15 02:30:11,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:30:11,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:11,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:30:11,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:30:11,853 INFO L87 Difference]: Start difference. First operand 621 states and 1819 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:12,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:12,444 INFO L93 Difference]: Finished difference Result 789 states and 2195 transitions. [2021-04-15 02:30:12,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:30:12,445 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:12,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:12,446 INFO L225 Difference]: With dead ends: 789 [2021-04-15 02:30:12,446 INFO L226 Difference]: Without dead ends: 779 [2021-04-15 02:30:12,446 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 494.8ms TimeCoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 02:30:12,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-04-15 02:30:12,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 622. [2021-04-15 02:30:12,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.9355877616747184) internal successors, (1823), 621 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:12,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1823 transitions. [2021-04-15 02:30:12,452 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1823 transitions. Word has length 19 [2021-04-15 02:30:12,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:12,452 INFO L480 AbstractCegarLoop]: Abstraction has 622 states and 1823 transitions. [2021-04-15 02:30:12,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:12,452 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1823 transitions. [2021-04-15 02:30:12,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:12,453 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:12,453 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:12,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3020 [2021-04-15 02:30:12,668 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:12,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:12,669 INFO L82 PathProgramCache]: Analyzing trace with hash -704684536, now seen corresponding path program 179 times [2021-04-15 02:30:12,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:12,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190045541] [2021-04-15 02:30:12,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:12,765 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:12,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190045541] [2021-04-15 02:30:12,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929976881] [2021-04-15 02:30:12,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:12,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:30:12,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:12,787 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:12,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:13,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:13,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:13,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:13,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:13,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:30:13,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:30:13,219 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:13,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:13,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:30:13,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89345618] [2021-04-15 02:30:13,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:13,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:13,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:13,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:13,220 INFO L87 Difference]: Start difference. First operand 622 states and 1823 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:13,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:13,610 INFO L93 Difference]: Finished difference Result 716 states and 2072 transitions. [2021-04-15 02:30:13,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:30:13,610 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:13,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:13,611 INFO L225 Difference]: With dead ends: 716 [2021-04-15 02:30:13,611 INFO L226 Difference]: Without dead ends: 700 [2021-04-15 02:30:13,612 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 318.6ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:30:13,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-04-15 02:30:13,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 661. [2021-04-15 02:30:13,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.9681818181818183) internal successors, (1959), 660 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:13,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1959 transitions. [2021-04-15 02:30:13,618 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1959 transitions. Word has length 19 [2021-04-15 02:30:13,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:13,618 INFO L480 AbstractCegarLoop]: Abstraction has 661 states and 1959 transitions. [2021-04-15 02:30:13,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:13,618 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1959 transitions. [2021-04-15 02:30:13,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:13,619 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:13,619 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:13,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3160 [2021-04-15 02:30:13,844 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:13,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:13,845 INFO L82 PathProgramCache]: Analyzing trace with hash 154189994, now seen corresponding path program 180 times [2021-04-15 02:30:13,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:13,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386633273] [2021-04-15 02:30:13,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:13,918 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:13,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386633273] [2021-04-15 02:30:13,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579490207] [2021-04-15 02:30:13,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:13,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:30:13,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:13,938 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:13,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:14,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:14,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:14,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:14,426 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:14,427 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:14,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:14,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:14,512 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:14,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:14,512 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:14,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:14,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:30:14,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524180749] [2021-04-15 02:30:14,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:14,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:14,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:14,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:14,542 INFO L87 Difference]: Start difference. First operand 661 states and 1959 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:15,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:15,279 INFO L93 Difference]: Finished difference Result 807 states and 2279 transitions. [2021-04-15 02:30:15,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 02:30:15,280 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:15,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:15,280 INFO L225 Difference]: With dead ends: 807 [2021-04-15 02:30:15,281 INFO L226 Difference]: Without dead ends: 781 [2021-04-15 02:30:15,281 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 495.8ms TimeCoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 02:30:15,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-04-15 02:30:15,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 667. [2021-04-15 02:30:15,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 2.9684684684684686) internal successors, (1977), 666 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:15,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1977 transitions. [2021-04-15 02:30:15,287 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1977 transitions. Word has length 19 [2021-04-15 02:30:15,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:15,287 INFO L480 AbstractCegarLoop]: Abstraction has 667 states and 1977 transitions. [2021-04-15 02:30:15,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:15,287 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1977 transitions. [2021-04-15 02:30:15,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:15,288 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:15,288 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:15,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3234,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:15,488 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:15,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:15,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1864803302, now seen corresponding path program 181 times [2021-04-15 02:30:15,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:15,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852766001] [2021-04-15 02:30:15,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:15,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852766001] [2021-04-15 02:30:15,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660872368] [2021-04-15 02:30:15,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:15,590 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:15,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:15,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:15,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:15,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:16,054 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:16,055 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:16,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:16,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:16,151 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:16,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:16,151 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:16,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:16,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:30:16,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850389642] [2021-04-15 02:30:16,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:16,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:16,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:16,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:16,180 INFO L87 Difference]: Start difference. First operand 667 states and 1977 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:16,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:16,599 INFO L93 Difference]: Finished difference Result 766 states and 2183 transitions. [2021-04-15 02:30:16,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:30:16,600 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:16,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:16,601 INFO L225 Difference]: With dead ends: 766 [2021-04-15 02:30:16,601 INFO L226 Difference]: Without dead ends: 756 [2021-04-15 02:30:16,601 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 426.8ms TimeCoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 02:30:16,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-04-15 02:30:16,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 675. [2021-04-15 02:30:16,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 2.970326409495549) internal successors, (2002), 674 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:16,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 2002 transitions. [2021-04-15 02:30:16,611 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 2002 transitions. Word has length 19 [2021-04-15 02:30:16,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:16,611 INFO L480 AbstractCegarLoop]: Abstraction has 675 states and 2002 transitions. [2021-04-15 02:30:16,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:16,611 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 2002 transitions. [2021-04-15 02:30:16,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:16,612 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:16,612 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:16,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:16,812 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:16,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:16,813 INFO L82 PathProgramCache]: Analyzing trace with hash -940758998, now seen corresponding path program 182 times [2021-04-15 02:30:16,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:16,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363199795] [2021-04-15 02:30:16,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:16,906 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:16,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363199795] [2021-04-15 02:30:16,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735828820] [2021-04-15 02:30:16,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:16,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:16,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:16,924 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:16,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:17,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:17,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:17,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:17,395 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:17,395 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:17,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:17,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:17,482 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:17,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:17,482 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:17,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:17,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:30:17,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901138457] [2021-04-15 02:30:17,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:30:17,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:17,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:30:17,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:30:17,511 INFO L87 Difference]: Start difference. First operand 675 states and 2002 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:18,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:18,118 INFO L93 Difference]: Finished difference Result 837 states and 2353 transitions. [2021-04-15 02:30:18,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:30:18,118 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:18,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:18,119 INFO L225 Difference]: With dead ends: 837 [2021-04-15 02:30:18,119 INFO L226 Difference]: Without dead ends: 808 [2021-04-15 02:30:18,119 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 559.7ms TimeCoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 02:30:18,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-04-15 02:30:18,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 670. [2021-04-15 02:30:18,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 2.968609865470852) internal successors, (1986), 669 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:18,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1986 transitions. [2021-04-15 02:30:18,125 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1986 transitions. Word has length 19 [2021-04-15 02:30:18,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:18,125 INFO L480 AbstractCegarLoop]: Abstraction has 670 states and 1986 transitions. [2021-04-15 02:30:18,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:18,125 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1986 transitions. [2021-04-15 02:30:18,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:18,126 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:18,126 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:18,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3464,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:18,326 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:18,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:18,326 INFO L82 PathProgramCache]: Analyzing trace with hash -2013844378, now seen corresponding path program 183 times [2021-04-15 02:30:18,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:18,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311219953] [2021-04-15 02:30:18,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:18,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311219953] [2021-04-15 02:30:18,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287935129] [2021-04-15 02:30:18,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:18,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:30:18,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:18,460 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:18,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:18,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:18,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:18,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:18,967 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:18,967 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:18,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:19,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:19,047 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:19,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:19,048 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:19,081 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:19,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:19,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:30:19,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915065155] [2021-04-15 02:30:19,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:30:19,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:19,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:30:19,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:30:19,082 INFO L87 Difference]: Start difference. First operand 670 states and 1986 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:19,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:19,541 INFO L93 Difference]: Finished difference Result 781 states and 2228 transitions. [2021-04-15 02:30:19,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:30:19,542 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:19,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:19,543 INFO L225 Difference]: With dead ends: 781 [2021-04-15 02:30:19,543 INFO L226 Difference]: Without dead ends: 771 [2021-04-15 02:30:19,543 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 517.4ms TimeCoverageRelationStatistics Valid=170, Invalid=1162, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:30:19,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-04-15 02:30:19,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 671. [2021-04-15 02:30:19,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.9686567164179105) internal successors, (1989), 670 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:19,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1989 transitions. [2021-04-15 02:30:19,549 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1989 transitions. Word has length 19 [2021-04-15 02:30:19,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:19,549 INFO L480 AbstractCegarLoop]: Abstraction has 671 states and 1989 transitions. [2021-04-15 02:30:19,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:19,549 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1989 transitions. [2021-04-15 02:30:19,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:19,550 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:19,550 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:19,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3561 [2021-04-15 02:30:19,764 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:19,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:19,764 INFO L82 PathProgramCache]: Analyzing trace with hash -806481870, now seen corresponding path program 184 times [2021-04-15 02:30:19,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:19,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473232906] [2021-04-15 02:30:19,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:19,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473232906] [2021-04-15 02:30:19,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281691589] [2021-04-15 02:30:19,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:19,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:19,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:19,859 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:19,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:20,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:20,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:20,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:20,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:20,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:30:20,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:30:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:20,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:20,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:30:20,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594129998] [2021-04-15 02:30:20,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:20,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:20,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:20,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:20,272 INFO L87 Difference]: Start difference. First operand 671 states and 1989 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:20,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:20,594 INFO L93 Difference]: Finished difference Result 702 states and 2034 transitions. [2021-04-15 02:30:20,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:30:20,595 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:20,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:20,596 INFO L225 Difference]: With dead ends: 702 [2021-04-15 02:30:20,596 INFO L226 Difference]: Without dead ends: 680 [2021-04-15 02:30:20,596 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:30:20,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-04-15 02:30:20,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 671. [2021-04-15 02:30:20,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.967164179104478) internal successors, (1988), 670 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:20,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1988 transitions. [2021-04-15 02:30:20,604 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1988 transitions. Word has length 19 [2021-04-15 02:30:20,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:20,604 INFO L480 AbstractCegarLoop]: Abstraction has 671 states and 1988 transitions. [2021-04-15 02:30:20,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:20,604 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1988 transitions. [2021-04-15 02:30:20,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:20,604 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:20,604 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:20,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3679,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:20,810 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:20,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:20,810 INFO L82 PathProgramCache]: Analyzing trace with hash 153350736, now seen corresponding path program 185 times [2021-04-15 02:30:20,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:20,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757676947] [2021-04-15 02:30:20,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:20,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:20,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757676947] [2021-04-15 02:30:20,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749323773] [2021-04-15 02:30:20,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:20,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:30:20,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:20,909 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:20,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:21,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:21,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:21,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:21,377 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:21,377 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:21,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:21,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:21,487 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:21,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:21,488 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:21,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:21,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:30:21,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461842791] [2021-04-15 02:30:21,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:21,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:21,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:21,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:21,516 INFO L87 Difference]: Start difference. First operand 671 states and 1988 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:22,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:22,062 INFO L93 Difference]: Finished difference Result 827 states and 2298 transitions. [2021-04-15 02:30:22,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:30:22,062 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:22,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:22,063 INFO L225 Difference]: With dead ends: 827 [2021-04-15 02:30:22,063 INFO L226 Difference]: Without dead ends: 805 [2021-04-15 02:30:22,064 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 486.5ms TimeCoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 02:30:22,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-04-15 02:30:22,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 670. [2021-04-15 02:30:22,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 2.9626307922272046) internal successors, (1982), 669 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:22,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1982 transitions. [2021-04-15 02:30:22,070 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1982 transitions. Word has length 19 [2021-04-15 02:30:22,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:22,070 INFO L480 AbstractCegarLoop]: Abstraction has 670 states and 1982 transitions. [2021-04-15 02:30:22,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:22,070 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1982 transitions. [2021-04-15 02:30:22,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:22,071 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:22,071 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:22,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3756 [2021-04-15 02:30:22,272 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:22,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:22,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1642755732, now seen corresponding path program 186 times [2021-04-15 02:30:22,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:22,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563248519] [2021-04-15 02:30:22,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:22,358 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:22,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563248519] [2021-04-15 02:30:22,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820074181] [2021-04-15 02:30:22,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:22,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:30:22,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:22,378 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:22,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:22,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:22,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:22,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:22,868 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:22,868 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:22,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:22,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:22,962 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:22,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:22,962 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:22,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:22,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:30:22,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163404863] [2021-04-15 02:30:22,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:30:22,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:22,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:30:22,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:30:22,991 INFO L87 Difference]: Start difference. First operand 670 states and 1982 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:23,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:23,649 INFO L93 Difference]: Finished difference Result 855 states and 2368 transitions. [2021-04-15 02:30:23,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:30:23,650 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:23,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:23,650 INFO L225 Difference]: With dead ends: 855 [2021-04-15 02:30:23,651 INFO L226 Difference]: Without dead ends: 826 [2021-04-15 02:30:23,651 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 571.2ms TimeCoverageRelationStatistics Valid=231, Invalid=1491, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:30:23,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-04-15 02:30:23,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 662. [2021-04-15 02:30:23,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 2.9531013615733737) internal successors, (1952), 661 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:23,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1952 transitions. [2021-04-15 02:30:23,657 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1952 transitions. Word has length 19 [2021-04-15 02:30:23,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:23,657 INFO L480 AbstractCegarLoop]: Abstraction has 662 states and 1952 transitions. [2021-04-15 02:30:23,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:23,657 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1952 transitions. [2021-04-15 02:30:23,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:23,658 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:23,658 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:23,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3865,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:23,861 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:23,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:23,861 INFO L82 PathProgramCache]: Analyzing trace with hash 569670352, now seen corresponding path program 187 times [2021-04-15 02:30:23,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:23,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567832306] [2021-04-15 02:30:23,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:23,944 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:23,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567832306] [2021-04-15 02:30:23,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043462811] [2021-04-15 02:30:23,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:23,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:23,962 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:23,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:24,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:24,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:24,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:24,440 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:24,441 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:24,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:24,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:24,513 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:24,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:24,513 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:24,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:24,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:30:24,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438820508] [2021-04-15 02:30:24,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:30:24,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:24,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:30:24,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:30:24,541 INFO L87 Difference]: Start difference. First operand 662 states and 1952 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:24,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:24,988 INFO L93 Difference]: Finished difference Result 809 states and 2278 transitions. [2021-04-15 02:30:24,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:30:24,988 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:24,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:24,989 INFO L225 Difference]: With dead ends: 809 [2021-04-15 02:30:24,989 INFO L226 Difference]: Without dead ends: 799 [2021-04-15 02:30:24,993 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 519.3ms TimeCoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 02:30:24,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-04-15 02:30:24,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 666. [2021-04-15 02:30:24,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.948872180451128) internal successors, (1961), 665 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:24,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1961 transitions. [2021-04-15 02:30:24,999 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1961 transitions. Word has length 19 [2021-04-15 02:30:24,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:24,999 INFO L480 AbstractCegarLoop]: Abstraction has 666 states and 1961 transitions. [2021-04-15 02:30:24,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:24,999 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1961 transitions. [2021-04-15 02:30:25,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:25,000 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:25,000 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:25,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3971,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:25,201 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:25,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:25,201 INFO L82 PathProgramCache]: Analyzing trace with hash -697786826, now seen corresponding path program 188 times [2021-04-15 02:30:25,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:25,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728251090] [2021-04-15 02:30:25,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:25,300 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:25,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728251090] [2021-04-15 02:30:25,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815057019] [2021-04-15 02:30:25,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:25,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:25,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:25,324 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:25,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:25,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:25,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:25,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:25,814 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:25,815 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:25,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:25,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:25,911 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:25,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:25,912 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:25,939 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:25,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:25,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:30:25,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891758145] [2021-04-15 02:30:25,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:30:25,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:25,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:30:25,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:30:25,939 INFO L87 Difference]: Start difference. First operand 666 states and 1961 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:26,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:26,640 INFO L93 Difference]: Finished difference Result 905 states and 2517 transitions. [2021-04-15 02:30:26,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:30:26,641 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:26,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:26,642 INFO L225 Difference]: With dead ends: 905 [2021-04-15 02:30:26,642 INFO L226 Difference]: Without dead ends: 895 [2021-04-15 02:30:26,642 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 643.0ms TimeCoverageRelationStatistics Valid=241, Invalid=1651, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 02:30:26,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-04-15 02:30:26,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 667. [2021-04-15 02:30:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 2.951951951951952) internal successors, (1966), 666 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:26,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1966 transitions. [2021-04-15 02:30:26,649 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1966 transitions. Word has length 19 [2021-04-15 02:30:26,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:26,649 INFO L480 AbstractCegarLoop]: Abstraction has 667 states and 1966 transitions. [2021-04-15 02:30:26,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:26,649 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1966 transitions. [2021-04-15 02:30:26,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:26,650 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:26,650 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:26,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4063 [2021-04-15 02:30:26,850 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:26,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:26,851 INFO L82 PathProgramCache]: Analyzing trace with hash 2094507954, now seen corresponding path program 189 times [2021-04-15 02:30:26,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:26,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912978915] [2021-04-15 02:30:26,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:26,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912978915] [2021-04-15 02:30:26,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569246503] [2021-04-15 02:30:26,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:26,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:30:26,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:26,951 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:26,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:27,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:27,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:27,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:27,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:27,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:30:27,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:30:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:27,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:27,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:30:27,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062028712] [2021-04-15 02:30:27,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:27,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:27,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:27,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:27,307 INFO L87 Difference]: Start difference. First operand 667 states and 1966 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:27,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:27,653 INFO L93 Difference]: Finished difference Result 778 states and 2267 transitions. [2021-04-15 02:30:27,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:30:27,653 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:27,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:27,654 INFO L225 Difference]: With dead ends: 778 [2021-04-15 02:30:27,654 INFO L226 Difference]: Without dead ends: 760 [2021-04-15 02:30:27,654 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 280.5ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:30:27,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-04-15 02:30:27,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 721. [2021-04-15 02:30:27,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 2.9875) internal successors, (2151), 720 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:27,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2151 transitions. [2021-04-15 02:30:27,661 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2151 transitions. Word has length 19 [2021-04-15 02:30:27,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:27,661 INFO L480 AbstractCegarLoop]: Abstraction has 721 states and 2151 transitions. [2021-04-15 02:30:27,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:27,661 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2151 transitions. [2021-04-15 02:30:27,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:27,661 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:27,661 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:27,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4173,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:27,862 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:27,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:27,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1341584812, now seen corresponding path program 190 times [2021-04-15 02:30:27,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:27,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766107656] [2021-04-15 02:30:27,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:27,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:27,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766107656] [2021-04-15 02:30:27,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571848553] [2021-04-15 02:30:27,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:27,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:27,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:27,960 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:27,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:28,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:28,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:28,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:28,423 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:28,423 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:28,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:28,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:28,536 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:28,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:28,537 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:28,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:28,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:30:28,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062416012] [2021-04-15 02:30:28,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:28,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:28,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:28,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:28,565 INFO L87 Difference]: Start difference. First operand 721 states and 2151 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:29,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:29,409 INFO L93 Difference]: Finished difference Result 908 states and 2570 transitions. [2021-04-15 02:30:29,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 02:30:29,410 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:29,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:29,411 INFO L225 Difference]: With dead ends: 908 [2021-04-15 02:30:29,411 INFO L226 Difference]: Without dead ends: 875 [2021-04-15 02:30:29,411 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 615.8ms TimeCoverageRelationStatistics Valid=252, Invalid=1728, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 02:30:29,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-04-15 02:30:29,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 729. [2021-04-15 02:30:29,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 2.993131868131868) internal successors, (2179), 728 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:29,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2179 transitions. [2021-04-15 02:30:29,418 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2179 transitions. Word has length 19 [2021-04-15 02:30:29,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:29,418 INFO L480 AbstractCegarLoop]: Abstraction has 729 states and 2179 transitions. [2021-04-15 02:30:29,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:29,418 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2179 transitions. [2021-04-15 02:30:29,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:29,419 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:29,419 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:29,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4231 [2021-04-15 02:30:29,619 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:29,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:29,619 INFO L82 PathProgramCache]: Analyzing trace with hash 369028496, now seen corresponding path program 191 times [2021-04-15 02:30:29,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:29,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738689408] [2021-04-15 02:30:29,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:29,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738689408] [2021-04-15 02:30:29,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438389016] [2021-04-15 02:30:29,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:29,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:30:29,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:29,727 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:29,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:29,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:29,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:30,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:30,229 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:30,229 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:30,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:30,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:30,328 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:30,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:30,329 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:30,357 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:30,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:30,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:30:30,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456356774] [2021-04-15 02:30:30,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:30:30,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:30,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:30:30,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:30:30,358 INFO L87 Difference]: Start difference. First operand 729 states and 2179 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:31,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:31,380 INFO L93 Difference]: Finished difference Result 1020 states and 2819 transitions. [2021-04-15 02:30:31,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 02:30:31,381 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:31,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:31,382 INFO L225 Difference]: With dead ends: 1020 [2021-04-15 02:30:31,382 INFO L226 Difference]: Without dead ends: 973 [2021-04-15 02:30:31,382 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 746.7ms TimeCoverageRelationStatistics Valid=333, Invalid=2217, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 02:30:31,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-04-15 02:30:31,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 738. [2021-04-15 02:30:31,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 2.983717774762551) internal successors, (2199), 737 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:31,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2199 transitions. [2021-04-15 02:30:31,390 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2199 transitions. Word has length 19 [2021-04-15 02:30:31,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:31,390 INFO L480 AbstractCegarLoop]: Abstraction has 738 states and 2199 transitions. [2021-04-15 02:30:31,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:31,390 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2199 transitions. [2021-04-15 02:30:31,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:31,390 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:31,390 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:31,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4333,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:31,591 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:31,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:31,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1858433492, now seen corresponding path program 192 times [2021-04-15 02:30:31,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:31,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871015001] [2021-04-15 02:30:31,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:31,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871015001] [2021-04-15 02:30:31,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641315692] [2021-04-15 02:30:31,679 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:31,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:30:31,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:31,698 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:31,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:31,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:31,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:32,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:32,278 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:32,278 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:32,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:32,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:32,397 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:32,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:32,398 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:32,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:32,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:30:32,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365518575] [2021-04-15 02:30:32,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:30:32,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:32,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:30:32,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:30:32,427 INFO L87 Difference]: Start difference. First operand 738 states and 2199 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:33,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:33,112 INFO L93 Difference]: Finished difference Result 871 states and 2475 transitions. [2021-04-15 02:30:33,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:30:33,113 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:33,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:33,114 INFO L225 Difference]: With dead ends: 871 [2021-04-15 02:30:33,114 INFO L226 Difference]: Without dead ends: 856 [2021-04-15 02:30:33,114 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 566.6ms TimeCoverageRelationStatistics Valid=219, Invalid=1503, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:30:33,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-04-15 02:30:33,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 743. [2021-04-15 02:30:33,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 2.981132075471698) internal successors, (2212), 742 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:33,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2212 transitions. [2021-04-15 02:30:33,121 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2212 transitions. Word has length 19 [2021-04-15 02:30:33,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:33,121 INFO L480 AbstractCegarLoop]: Abstraction has 743 states and 2212 transitions. [2021-04-15 02:30:33,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:33,121 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2212 transitions. [2021-04-15 02:30:33,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:33,122 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:33,122 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:33,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4454,197 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:33,323 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:33,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:33,323 INFO L82 PathProgramCache]: Analyzing trace with hash 785348112, now seen corresponding path program 193 times [2021-04-15 02:30:33,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:33,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889690170] [2021-04-15 02:30:33,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:33,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889690170] [2021-04-15 02:30:33,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843909639] [2021-04-15 02:30:33,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:33,465 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:33,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:33,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:33,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:33,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:33,928 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:33,928 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:33,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:34,146 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:34,161 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:34,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:34,161 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:34,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:34,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:30:34,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079774973] [2021-04-15 02:30:34,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:30:34,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:34,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:30:34,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:30:34,190 INFO L87 Difference]: Start difference. First operand 743 states and 2212 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:34,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:34,893 INFO L93 Difference]: Finished difference Result 917 states and 2588 transitions. [2021-04-15 02:30:34,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:30:34,894 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:34,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:34,895 INFO L225 Difference]: With dead ends: 917 [2021-04-15 02:30:34,895 INFO L226 Difference]: Without dead ends: 895 [2021-04-15 02:30:34,895 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 719.2ms TimeCoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 02:30:34,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-04-15 02:30:34,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 742. [2021-04-15 02:30:34,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.9851551956815117) internal successors, (2212), 741 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:34,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2212 transitions. [2021-04-15 02:30:34,902 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2212 transitions. Word has length 19 [2021-04-15 02:30:34,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:34,902 INFO L480 AbstractCegarLoop]: Abstraction has 742 states and 2212 transitions. [2021-04-15 02:30:34,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:34,902 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2212 transitions. [2021-04-15 02:30:34,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:34,903 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:34,903 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:35,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4622,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:35,103 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:35,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:35,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1879439700, now seen corresponding path program 194 times [2021-04-15 02:30:35,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:35,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923393179] [2021-04-15 02:30:35,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:35,202 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:35,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923393179] [2021-04-15 02:30:35,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784802161] [2021-04-15 02:30:35,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:35,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:35,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:35,219 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:35,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:35,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:35,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:35,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:35,745 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:35,746 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:35,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:35,817 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:35,832 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:35,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:35,833 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:35,861 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:35,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:35,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:30:35,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388684900] [2021-04-15 02:30:35,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:30:35,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:35,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:30:35,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:30:35,862 INFO L87 Difference]: Start difference. First operand 742 states and 2212 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:36,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:36,466 INFO L93 Difference]: Finished difference Result 882 states and 2522 transitions. [2021-04-15 02:30:36,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:30:36,467 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:36,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:36,468 INFO L225 Difference]: With dead ends: 882 [2021-04-15 02:30:36,468 INFO L226 Difference]: Without dead ends: 872 [2021-04-15 02:30:36,468 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 615.3ms TimeCoverageRelationStatistics Valid=213, Invalid=1347, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 02:30:36,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-04-15 02:30:36,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 742. [2021-04-15 02:30:36,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.9851551956815117) internal successors, (2212), 741 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:36,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2212 transitions. [2021-04-15 02:30:36,475 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2212 transitions. Word has length 19 [2021-04-15 02:30:36,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:36,475 INFO L480 AbstractCegarLoop]: Abstraction has 742 states and 2212 transitions. [2021-04-15 02:30:36,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:36,475 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2212 transitions. [2021-04-15 02:30:36,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:36,476 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:36,476 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:36,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4782,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:36,676 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:36,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:36,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1973063432, now seen corresponding path program 195 times [2021-04-15 02:30:36,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:36,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445096062] [2021-04-15 02:30:36,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:36,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445096062] [2021-04-15 02:30:36,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519939001] [2021-04-15 02:30:36,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:36,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:30:36,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:36,785 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:36,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:37,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:37,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:37,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:37,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:37,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:30:37,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:30:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:37,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:37,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:30:37,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896083198] [2021-04-15 02:30:37,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:30:37,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:37,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:30:37,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:30:37,168 INFO L87 Difference]: Start difference. First operand 742 states and 2212 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:37,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:37,486 INFO L93 Difference]: Finished difference Result 781 states and 2273 transitions. [2021-04-15 02:30:37,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:30:37,486 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:37,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:37,487 INFO L225 Difference]: With dead ends: 781 [2021-04-15 02:30:37,487 INFO L226 Difference]: Without dead ends: 759 [2021-04-15 02:30:37,487 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 374.2ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:30:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-04-15 02:30:37,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 742. [2021-04-15 02:30:37,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.982456140350877) internal successors, (2210), 741 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:37,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2210 transitions. [2021-04-15 02:30:37,494 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2210 transitions. Word has length 19 [2021-04-15 02:30:37,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:37,494 INFO L480 AbstractCegarLoop]: Abstraction has 742 states and 2210 transitions. [2021-04-15 02:30:37,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:37,494 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2210 transitions. [2021-04-15 02:30:37,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:37,495 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:37,495 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:37,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4890 [2021-04-15 02:30:37,701 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:37,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:37,702 INFO L82 PathProgramCache]: Analyzing trace with hash 343011498, now seen corresponding path program 196 times [2021-04-15 02:30:37,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:37,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272311098] [2021-04-15 02:30:37,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:37,786 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:37,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272311098] [2021-04-15 02:30:37,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306510009] [2021-04-15 02:30:37,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:37,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:37,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:37,803 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:37,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:38,061 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:38,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:38,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:38,300 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:38,301 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:38,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:38,407 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:38,421 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:38,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:38,422 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:38,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:38,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:30:38,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908084974] [2021-04-15 02:30:38,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:30:38,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:38,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:30:38,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:30:38,449 INFO L87 Difference]: Start difference. First operand 742 states and 2210 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:39,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:39,326 INFO L93 Difference]: Finished difference Result 986 states and 2710 transitions. [2021-04-15 02:30:39,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 02:30:39,326 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:39,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:39,327 INFO L225 Difference]: With dead ends: 986 [2021-04-15 02:30:39,328 INFO L226 Difference]: Without dead ends: 945 [2021-04-15 02:30:39,328 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 734.0ms TimeCoverageRelationStatistics Valid=328, Invalid=2222, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 02:30:39,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-04-15 02:30:39,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 738. [2021-04-15 02:30:39,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 2.976933514246947) internal successors, (2194), 737 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:39,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2194 transitions. [2021-04-15 02:30:39,335 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2194 transitions. Word has length 19 [2021-04-15 02:30:39,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:39,335 INFO L480 AbstractCegarLoop]: Abstraction has 738 states and 2194 transitions. [2021-04-15 02:30:39,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:39,335 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2194 transitions. [2021-04-15 02:30:39,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:39,336 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:39,336 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:39,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4951,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:39,536 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:39,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:39,537 INFO L82 PathProgramCache]: Analyzing trace with hash -730073882, now seen corresponding path program 197 times [2021-04-15 02:30:39,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:39,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518530832] [2021-04-15 02:30:39,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:39,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:39,644 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:39,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518530832] [2021-04-15 02:30:39,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776722838] [2021-04-15 02:30:39,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:39,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:30:39,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:39,662 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:39,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:39,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:39,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:40,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:40,186 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:40,187 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:40,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:40,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:40,375 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:40,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:40,376 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:40,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:40,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:30:40,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082769078] [2021-04-15 02:30:40,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:30:40,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:40,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:30:40,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:30:40,405 INFO L87 Difference]: Start difference. First operand 738 states and 2194 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:41,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:41,280 INFO L93 Difference]: Finished difference Result 978 states and 2744 transitions. [2021-04-15 02:30:41,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:30:41,280 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:41,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:41,282 INFO L225 Difference]: With dead ends: 978 [2021-04-15 02:30:41,282 INFO L226 Difference]: Without dead ends: 947 [2021-04-15 02:30:41,282 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 752.7ms TimeCoverageRelationStatistics Valid=296, Invalid=1960, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 02:30:41,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-04-15 02:30:41,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 716. [2021-04-15 02:30:41,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.9762237762237764) internal successors, (2128), 715 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:41,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 2128 transitions. [2021-04-15 02:30:41,292 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 2128 transitions. Word has length 19 [2021-04-15 02:30:41,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:41,292 INFO L480 AbstractCegarLoop]: Abstraction has 716 states and 2128 transitions. [2021-04-15 02:30:41,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:41,293 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 2128 transitions. [2021-04-15 02:30:41,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:41,293 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:41,293 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:41,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5087 [2021-04-15 02:30:41,494 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:41,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:41,494 INFO L82 PathProgramCache]: Analyzing trace with hash 364017706, now seen corresponding path program 198 times [2021-04-15 02:30:41,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:41,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473716363] [2021-04-15 02:30:41,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:41,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473716363] [2021-04-15 02:30:41,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776265868] [2021-04-15 02:30:41,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:41,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:30:41,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:41,612 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:41,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:41,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:41,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:41,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:42,107 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:42,108 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:42,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:42,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:42,186 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:42,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:42,187 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:42,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:42,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:30:42,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239430703] [2021-04-15 02:30:42,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:30:42,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:42,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:30:42,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:30:42,218 INFO L87 Difference]: Start difference. First operand 716 states and 2128 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:42,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:42,820 INFO L93 Difference]: Finished difference Result 934 states and 2662 transitions. [2021-04-15 02:30:42,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:30:42,820 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:42,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:42,821 INFO L225 Difference]: With dead ends: 934 [2021-04-15 02:30:42,821 INFO L226 Difference]: Without dead ends: 924 [2021-04-15 02:30:42,822 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 646.7ms TimeCoverageRelationStatistics Valid=229, Invalid=1493, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:30:42,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-04-15 02:30:42,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 719. [2021-04-15 02:30:42,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 2.9763231197771587) internal successors, (2137), 718 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:42,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2137 transitions. [2021-04-15 02:30:42,829 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2137 transitions. Word has length 19 [2021-04-15 02:30:42,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:42,829 INFO L480 AbstractCegarLoop]: Abstraction has 719 states and 2137 transitions. [2021-04-15 02:30:42,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:42,829 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2137 transitions. [2021-04-15 02:30:42,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:42,830 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:42,830 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:43,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5260,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:43,030 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:43,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:43,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1221778650, now seen corresponding path program 199 times [2021-04-15 02:30:43,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:43,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605690100] [2021-04-15 02:30:43,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:43,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:43,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605690100] [2021-04-15 02:30:43,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140243271] [2021-04-15 02:30:43,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:43,130 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:43,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:43,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:43,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:43,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:43,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:43,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:30:43,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:30:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:43,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:43,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:30:43,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14301709] [2021-04-15 02:30:43,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:43,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:43,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:43,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:43,501 INFO L87 Difference]: Start difference. First operand 719 states and 2137 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:43,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:43,831 INFO L93 Difference]: Finished difference Result 746 states and 2179 transitions. [2021-04-15 02:30:43,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:30:43,832 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:43,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:43,833 INFO L225 Difference]: With dead ends: 746 [2021-04-15 02:30:43,833 INFO L226 Difference]: Without dead ends: 728 [2021-04-15 02:30:43,833 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 324.1ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:30:43,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-04-15 02:30:43,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 719. [2021-04-15 02:30:43,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 2.9749303621169916) internal successors, (2136), 718 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:43,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2136 transitions. [2021-04-15 02:30:43,839 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2136 transitions. Word has length 19 [2021-04-15 02:30:43,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:43,839 INFO L480 AbstractCegarLoop]: Abstraction has 719 states and 2136 transitions. [2021-04-15 02:30:43,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:43,839 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2136 transitions. [2021-04-15 02:30:43,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:43,840 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:43,840 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:44,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5328,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:44,040 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:44,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:44,041 INFO L82 PathProgramCache]: Analyzing trace with hash -272449148, now seen corresponding path program 200 times [2021-04-15 02:30:44,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:44,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373447352] [2021-04-15 02:30:44,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:44,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:44,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373447352] [2021-04-15 02:30:44,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371599471] [2021-04-15 02:30:44,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:44,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:44,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:44,158 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:44,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:44,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:44,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:44,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:44,739 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:44,739 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:44,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:44,802 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:44,817 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:44,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:44,818 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:44,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:44,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:30:44,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579182350] [2021-04-15 02:30:44,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:30:44,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:44,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:30:44,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:30:44,848 INFO L87 Difference]: Start difference. First operand 719 states and 2136 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:45,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:45,733 INFO L93 Difference]: Finished difference Result 991 states and 2826 transitions. [2021-04-15 02:30:45,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:30:45,734 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:45,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:45,735 INFO L225 Difference]: With dead ends: 991 [2021-04-15 02:30:45,735 INFO L226 Difference]: Without dead ends: 981 [2021-04-15 02:30:45,735 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 820.8ms TimeCoverageRelationStatistics Valid=277, Invalid=1885, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 02:30:45,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-04-15 02:30:45,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 730. [2021-04-15 02:30:45,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 2.9753086419753085) internal successors, (2169), 729 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:45,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2169 transitions. [2021-04-15 02:30:45,742 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2169 transitions. Word has length 19 [2021-04-15 02:30:45,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:45,742 INFO L480 AbstractCegarLoop]: Abstraction has 730 states and 2169 transitions. [2021-04-15 02:30:45,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:45,743 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2169 transitions. [2021-04-15 02:30:45,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:45,743 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:45,743 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:45,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5377,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:45,944 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:45,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:45,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1324838072, now seen corresponding path program 201 times [2021-04-15 02:30:45,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:45,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068858666] [2021-04-15 02:30:45,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:46,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068858666] [2021-04-15 02:30:46,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418060508] [2021-04-15 02:30:46,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:46,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:30:46,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:46,049 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:46,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:46,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:46,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:46,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:46,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:46,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:30:46,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:30:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:46,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:46,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:30:46,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367139051] [2021-04-15 02:30:46,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:46,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:46,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:46,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:46,438 INFO L87 Difference]: Start difference. First operand 730 states and 2169 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:46,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:46,807 INFO L93 Difference]: Finished difference Result 865 states and 2545 transitions. [2021-04-15 02:30:46,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:30:46,807 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:46,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:46,808 INFO L225 Difference]: With dead ends: 865 [2021-04-15 02:30:46,808 INFO L226 Difference]: Without dead ends: 849 [2021-04-15 02:30:46,809 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 286.3ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:30:46,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-04-15 02:30:46,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 821. [2021-04-15 02:30:46,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.0) internal successors, (2460), 820 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:46,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2460 transitions. [2021-04-15 02:30:46,816 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2460 transitions. Word has length 19 [2021-04-15 02:30:46,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:46,816 INFO L480 AbstractCegarLoop]: Abstraction has 821 states and 2460 transitions. [2021-04-15 02:30:46,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:46,816 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2460 transitions. [2021-04-15 02:30:46,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:46,817 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:46,817 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:47,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5501,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:47,018 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:47,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:47,018 INFO L82 PathProgramCache]: Analyzing trace with hash -465963542, now seen corresponding path program 202 times [2021-04-15 02:30:47,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:47,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766811962] [2021-04-15 02:30:47,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:47,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:47,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766811962] [2021-04-15 02:30:47,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656605874] [2021-04-15 02:30:47,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:47,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:47,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:47,115 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:47,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:47,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:47,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:47,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:47,626 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:47,626 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:47,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:47,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:47,709 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:47,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:47,710 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:47,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:47,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:30:47,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057334923] [2021-04-15 02:30:47,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:47,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:47,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:47,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:47,739 INFO L87 Difference]: Start difference. First operand 821 states and 2460 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:48,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:48,724 INFO L93 Difference]: Finished difference Result 986 states and 2831 transitions. [2021-04-15 02:30:48,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 02:30:48,725 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:48,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:48,726 INFO L225 Difference]: With dead ends: 986 [2021-04-15 02:30:48,726 INFO L226 Difference]: Without dead ends: 955 [2021-04-15 02:30:48,726 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 653.7ms TimeCoverageRelationStatistics Valid=256, Invalid=2000, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 02:30:48,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-04-15 02:30:48,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 825. [2021-04-15 02:30:48,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 3.003640776699029) internal successors, (2475), 824 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:48,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 2475 transitions. [2021-04-15 02:30:48,734 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 2475 transitions. Word has length 19 [2021-04-15 02:30:48,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:48,734 INFO L480 AbstractCegarLoop]: Abstraction has 825 states and 2475 transitions. [2021-04-15 02:30:48,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:48,734 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 2475 transitions. [2021-04-15 02:30:48,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:48,735 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:48,735 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:48,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5576 [2021-04-15 02:30:48,935 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:48,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:48,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1244649766, now seen corresponding path program 203 times [2021-04-15 02:30:48,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:48,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877651440] [2021-04-15 02:30:48,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:49,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877651440] [2021-04-15 02:30:49,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596225350] [2021-04-15 02:30:49,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:49,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:30:49,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:49,033 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:49,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:49,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:49,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:49,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:49,518 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:49,518 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:49,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:49,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:49,638 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:49,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:49,638 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:49,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:49,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:30:49,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429223178] [2021-04-15 02:30:49,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:49,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:49,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:49,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:49,668 INFO L87 Difference]: Start difference. First operand 825 states and 2475 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:50,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:50,364 INFO L93 Difference]: Finished difference Result 1003 states and 2905 transitions. [2021-04-15 02:30:50,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 02:30:50,364 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:50,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:50,365 INFO L225 Difference]: With dead ends: 1003 [2021-04-15 02:30:50,365 INFO L226 Difference]: Without dead ends: 993 [2021-04-15 02:30:50,365 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 560.7ms TimeCoverageRelationStatistics Valid=198, Invalid=1608, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 02:30:50,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-04-15 02:30:50,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 875. [2021-04-15 02:30:50,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 3.011441647597254) internal successors, (2632), 874 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:50,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2632 transitions. [2021-04-15 02:30:50,374 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2632 transitions. Word has length 19 [2021-04-15 02:30:50,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:50,374 INFO L480 AbstractCegarLoop]: Abstraction has 875 states and 2632 transitions. [2021-04-15 02:30:50,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:50,374 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2632 transitions. [2021-04-15 02:30:50,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:50,375 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:50,375 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:50,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5692,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:50,575 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:50,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:50,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1560912534, now seen corresponding path program 204 times [2021-04-15 02:30:50,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:50,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097726710] [2021-04-15 02:30:50,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:50,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097726710] [2021-04-15 02:30:50,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261336012] [2021-04-15 02:30:50,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:50,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:30:50,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:50,683 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:50,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:50,967 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:50,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:51,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:51,185 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:51,186 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:51,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:51,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:51,267 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:51,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:51,268 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:51,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:51,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:30:51,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886629724] [2021-04-15 02:30:51,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:30:51,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:51,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:30:51,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:30:51,297 INFO L87 Difference]: Start difference. First operand 875 states and 2632 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:52,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:52,217 INFO L93 Difference]: Finished difference Result 1134 states and 3184 transitions. [2021-04-15 02:30:52,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 02:30:52,217 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:52,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:52,218 INFO L225 Difference]: With dead ends: 1134 [2021-04-15 02:30:52,218 INFO L226 Difference]: Without dead ends: 1100 [2021-04-15 02:30:52,219 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 762.6ms TimeCoverageRelationStatistics Valid=307, Invalid=2345, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 02:30:52,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-04-15 02:30:52,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 884. [2021-04-15 02:30:52,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.0067950169875424) internal successors, (2655), 883 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:52,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2655 transitions. [2021-04-15 02:30:52,228 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2655 transitions. Word has length 19 [2021-04-15 02:30:52,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:52,228 INFO L480 AbstractCegarLoop]: Abstraction has 884 states and 2655 transitions. [2021-04-15 02:30:52,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:52,228 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2655 transitions. [2021-04-15 02:30:52,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:52,229 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:52,229 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:52,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5802 [2021-04-15 02:30:52,429 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:52,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:52,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1660969382, now seen corresponding path program 205 times [2021-04-15 02:30:52,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:52,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815533620] [2021-04-15 02:30:52,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:52,525 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:52,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815533620] [2021-04-15 02:30:52,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396979565] [2021-04-15 02:30:52,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:52,542 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:52,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:52,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:52,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:52,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:53,019 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:53,020 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:53,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:53,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:53,140 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:53,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:53,141 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:53,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:53,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:30:53,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804843282] [2021-04-15 02:30:53,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:30:53,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:53,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:30:53,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:30:53,170 INFO L87 Difference]: Start difference. First operand 884 states and 2655 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:53,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:53,898 INFO L93 Difference]: Finished difference Result 1000 states and 2894 transitions. [2021-04-15 02:30:53,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:30:53,898 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:53,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:53,899 INFO L225 Difference]: With dead ends: 1000 [2021-04-15 02:30:53,899 INFO L226 Difference]: Without dead ends: 985 [2021-04-15 02:30:53,900 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 664.5ms TimeCoverageRelationStatistics Valid=246, Invalid=1646, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 02:30:53,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-04-15 02:30:53,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 889. [2021-04-15 02:30:53,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.0033783783783785) internal successors, (2667), 888 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:53,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2667 transitions. [2021-04-15 02:30:53,908 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2667 transitions. Word has length 19 [2021-04-15 02:30:53,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:53,908 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 2667 transitions. [2021-04-15 02:30:53,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:53,908 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2667 transitions. [2021-04-15 02:30:53,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:53,909 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:53,909 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:54,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5893 [2021-04-15 02:30:54,125 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:54,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:54,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1539906326, now seen corresponding path program 206 times [2021-04-15 02:30:54,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:54,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459270961] [2021-04-15 02:30:54,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:54,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459270961] [2021-04-15 02:30:54,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531812271] [2021-04-15 02:30:54,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:54,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:54,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:54,244 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:54,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:54,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:54,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:54,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:54,734 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:54,735 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:54,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:54,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:54,820 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:54,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:54,820 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:54,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:54,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:30:54,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520438700] [2021-04-15 02:30:54,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:30:54,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:54,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:30:54,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:30:54,850 INFO L87 Difference]: Start difference. First operand 889 states and 2667 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:55,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:55,641 INFO L93 Difference]: Finished difference Result 1045 states and 2995 transitions. [2021-04-15 02:30:55,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:30:55,641 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:55,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:55,642 INFO L225 Difference]: With dead ends: 1045 [2021-04-15 02:30:55,642 INFO L226 Difference]: Without dead ends: 1030 [2021-04-15 02:30:55,642 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 771.8ms TimeCoverageRelationStatistics Valid=268, Invalid=1712, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 02:30:55,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-04-15 02:30:55,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 889. [2021-04-15 02:30:55,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.009009009009009) internal successors, (2672), 888 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:55,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2672 transitions. [2021-04-15 02:30:55,651 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2672 transitions. Word has length 19 [2021-04-15 02:30:55,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:55,651 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 2672 transitions. [2021-04-15 02:30:55,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:55,651 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2672 transitions. [2021-04-15 02:30:55,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:55,652 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:55,652 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:55,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5995,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:55,852 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:55,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:55,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1982805466, now seen corresponding path program 207 times [2021-04-15 02:30:55,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:55,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690796862] [2021-04-15 02:30:55,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:55,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690796862] [2021-04-15 02:30:55,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205959971] [2021-04-15 02:30:55,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:30:55,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:30:55,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:55,993 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:55,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:56,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:56,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:56,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:56,520 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:56,520 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:56,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:56,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:56,702 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:56,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:56,703 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:56,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:56,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:30:56,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842780159] [2021-04-15 02:30:56,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:30:56,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:56,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:30:56,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:30:56,732 INFO L87 Difference]: Start difference. First operand 889 states and 2672 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:57,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:57,315 INFO L93 Difference]: Finished difference Result 997 states and 2917 transitions. [2021-04-15 02:30:57,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:30:57,315 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:57,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:57,316 INFO L225 Difference]: With dead ends: 997 [2021-04-15 02:30:57,316 INFO L226 Difference]: Without dead ends: 992 [2021-04-15 02:30:57,316 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 673.7ms TimeCoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 02:30:57,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-04-15 02:30:57,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 889. [2021-04-15 02:30:57,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.009009009009009) internal successors, (2672), 888 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:57,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2672 transitions. [2021-04-15 02:30:57,325 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2672 transitions. Word has length 19 [2021-04-15 02:30:57,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:57,325 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 2672 transitions. [2021-04-15 02:30:57,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:57,325 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2672 transitions. [2021-04-15 02:30:57,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:57,326 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:57,326 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:57,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6097 [2021-04-15 02:30:57,526 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:57,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:57,526 INFO L82 PathProgramCache]: Analyzing trace with hash -2055345422, now seen corresponding path program 208 times [2021-04-15 02:30:57,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:57,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114570877] [2021-04-15 02:30:57,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:57,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114570877] [2021-04-15 02:30:57,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887895396] [2021-04-15 02:30:57,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:57,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:57,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:57,663 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:57,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:57,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:57,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:58,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:58,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:58,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:30:58,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:30:58,046 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:58,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:58,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:30:58,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262010794] [2021-04-15 02:30:58,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:30:58,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:58,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:30:58,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:30:58,047 INFO L87 Difference]: Start difference. First operand 889 states and 2672 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:58,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:58,468 INFO L93 Difference]: Finished difference Result 952 states and 2781 transitions. [2021-04-15 02:30:58,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:30:58,469 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:30:58,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:58,470 INFO L225 Difference]: With dead ends: 952 [2021-04-15 02:30:58,470 INFO L226 Difference]: Without dead ends: 924 [2021-04-15 02:30:58,470 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 403.4ms TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:30:58,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-04-15 02:30:58,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 889. [2021-04-15 02:30:58,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.001126126126126) internal successors, (2665), 888 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:58,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2665 transitions. [2021-04-15 02:30:58,484 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2665 transitions. Word has length 19 [2021-04-15 02:30:58,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:58,484 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 2665 transitions. [2021-04-15 02:30:58,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:58,485 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2665 transitions. [2021-04-15 02:30:58,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:30:58,485 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:58,485 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:58,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6217,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:58,686 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:58,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:58,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1927527824, now seen corresponding path program 209 times [2021-04-15 02:30:58,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:58,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053563144] [2021-04-15 02:30:58,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:58,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:58,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053563144] [2021-04-15 02:30:58,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293400352] [2021-04-15 02:30:58,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:58,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:30:58,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:58,793 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:30:58,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:59,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:59,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:59,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:59,241 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:59,241 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:59,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:59,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:59,356 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:59,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:59,357 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:30:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:59,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:59,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:30:59,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176667939] [2021-04-15 02:30:59,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:30:59,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:59,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:30:59,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:30:59,387 INFO L87 Difference]: Start difference. First operand 889 states and 2665 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:00,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:00,379 INFO L93 Difference]: Finished difference Result 1134 states and 3182 transitions. [2021-04-15 02:31:00,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 02:31:00,380 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:00,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:00,381 INFO L225 Difference]: With dead ends: 1134 [2021-04-15 02:31:00,381 INFO L226 Difference]: Without dead ends: 1107 [2021-04-15 02:31:00,381 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 864.9ms TimeCoverageRelationStatistics Valid=362, Invalid=2608, Unknown=0, NotChecked=0, Total=2970 [2021-04-15 02:31:00,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-04-15 02:31:00,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 889. [2021-04-15 02:31:00,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 2.9977477477477477) internal successors, (2662), 888 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:00,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2662 transitions. [2021-04-15 02:31:00,390 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2662 transitions. Word has length 19 [2021-04-15 02:31:00,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:00,390 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 2662 transitions. [2021-04-15 02:31:00,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:00,390 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2662 transitions. [2021-04-15 02:31:00,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:00,391 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:00,391 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:00,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6269,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:00,591 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:00,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:00,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1273347884, now seen corresponding path program 210 times [2021-04-15 02:31:00,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:00,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558872300] [2021-04-15 02:31:00,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:00,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558872300] [2021-04-15 02:31:00,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859311043] [2021-04-15 02:31:00,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:00,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:31:00,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:00,708 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:31:00,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:00,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:00,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:01,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:01,193 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:31:01,194 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:31:01,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:31:01,345 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:31:01,361 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:31:01,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:01,362 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:31:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:01,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:01,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:31:01,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744151893] [2021-04-15 02:31:01,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:31:01,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:01,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:31:01,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:31:01,392 INFO L87 Difference]: Start difference. First operand 889 states and 2662 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:02,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:02,368 INFO L93 Difference]: Finished difference Result 1135 states and 3226 transitions. [2021-04-15 02:31:02,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 02:31:02,368 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:02,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:02,369 INFO L225 Difference]: With dead ends: 1135 [2021-04-15 02:31:02,369 INFO L226 Difference]: Without dead ends: 1106 [2021-04-15 02:31:02,370 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 914.2ms TimeCoverageRelationStatistics Valid=348, Invalid=2304, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 02:31:02,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-04-15 02:31:02,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 867. [2021-04-15 02:31:02,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 2.9976905311778292) internal successors, (2596), 866 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:02,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2596 transitions. [2021-04-15 02:31:02,378 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2596 transitions. Word has length 19 [2021-04-15 02:31:02,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:02,378 INFO L480 AbstractCegarLoop]: Abstraction has 867 states and 2596 transitions. [2021-04-15 02:31:02,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:02,378 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2596 transitions. [2021-04-15 02:31:02,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:02,379 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:02,379 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:02,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6359,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:02,579 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:02,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:02,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1716247024, now seen corresponding path program 211 times [2021-04-15 02:31:02,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:02,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828399324] [2021-04-15 02:31:02,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:02,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:02,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828399324] [2021-04-15 02:31:02,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854980626] [2021-04-15 02:31:02,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:02,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:02,696 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:31:02,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:02,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:02,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:03,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:03,195 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:31:03,196 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:31:03,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:31:03,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:31:03,311 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:31:03,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:03,312 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:31:03,341 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:03,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:03,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:31:03,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974522017] [2021-04-15 02:31:03,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:31:03,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:03,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:31:03,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:31:03,342 INFO L87 Difference]: Start difference. First operand 867 states and 2596 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:04,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:04,157 INFO L93 Difference]: Finished difference Result 1062 states and 3058 transitions. [2021-04-15 02:31:04,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:31:04,158 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:04,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:04,159 INFO L225 Difference]: With dead ends: 1062 [2021-04-15 02:31:04,159 INFO L226 Difference]: Without dead ends: 1052 [2021-04-15 02:31:04,159 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 783.0ms TimeCoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 02:31:04,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-04-15 02:31:04,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 869. [2021-04-15 02:31:04,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 2.9976958525345623) internal successors, (2602), 868 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:04,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2602 transitions. [2021-04-15 02:31:04,168 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2602 transitions. Word has length 19 [2021-04-15 02:31:04,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:04,168 INFO L480 AbstractCegarLoop]: Abstraction has 869 states and 2602 transitions. [2021-04-15 02:31:04,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:04,168 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2602 transitions. [2021-04-15 02:31:04,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:04,168 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:04,169 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:04,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6495 [2021-04-15 02:31:04,369 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:04,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:04,369 INFO L82 PathProgramCache]: Analyzing trace with hash 789143798, now seen corresponding path program 212 times [2021-04-15 02:31:04,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:04,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788947470] [2021-04-15 02:31:04,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:04,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788947470] [2021-04-15 02:31:04,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700964828] [2021-04-15 02:31:04,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:04,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:31:04,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:04,481 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:31:04,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:04,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:04,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:04,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:04,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:04,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:04,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:31:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:04,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:04,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:31:04,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733819100] [2021-04-15 02:31:04,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:31:04,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:04,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:31:04,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:31:04,891 INFO L87 Difference]: Start difference. First operand 869 states and 2602 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:05,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:05,253 INFO L93 Difference]: Finished difference Result 915 states and 2683 transitions. [2021-04-15 02:31:05,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:31:05,253 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:05,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:05,254 INFO L225 Difference]: With dead ends: 915 [2021-04-15 02:31:05,255 INFO L226 Difference]: Without dead ends: 897 [2021-04-15 02:31:05,255 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 352.0ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:31:05,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-04-15 02:31:05,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 869. [2021-04-15 02:31:05,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 2.9953917050691246) internal successors, (2600), 868 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:05,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2600 transitions. [2021-04-15 02:31:05,263 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2600 transitions. Word has length 19 [2021-04-15 02:31:05,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:05,263 INFO L480 AbstractCegarLoop]: Abstraction has 869 states and 2600 transitions. [2021-04-15 02:31:05,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:05,263 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2600 transitions. [2021-04-15 02:31:05,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:05,264 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:05,264 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:05,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6607 [2021-04-15 02:31:05,465 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:05,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:05,465 INFO L82 PathProgramCache]: Analyzing trace with hash 28116982, now seen corresponding path program 213 times [2021-04-15 02:31:05,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:05,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392871360] [2021-04-15 02:31:05,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:05,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392871360] [2021-04-15 02:31:05,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629490215] [2021-04-15 02:31:05,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:05,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:31:05,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:05,593 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:31:05,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:05,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:05,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:05,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:06,079 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:31:06,080 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:31:06,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:31:06,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:31:06,311 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:31:06,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:06,312 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:31:06,342 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:06,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:06,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:31:06,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657416622] [2021-04-15 02:31:06,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:31:06,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:06,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:31:06,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:31:06,342 INFO L87 Difference]: Start difference. First operand 869 states and 2600 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:07,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:07,383 INFO L93 Difference]: Finished difference Result 1107 states and 3182 transitions. [2021-04-15 02:31:07,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:31:07,383 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:07,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:07,385 INFO L225 Difference]: With dead ends: 1107 [2021-04-15 02:31:07,385 INFO L226 Difference]: Without dead ends: 1097 [2021-04-15 02:31:07,385 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 961.5ms TimeCoverageRelationStatistics Valid=341, Invalid=2109, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 02:31:07,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-04-15 02:31:07,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 896. [2021-04-15 02:31:07,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 2.9966480446927375) internal successors, (2682), 895 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:07,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2682 transitions. [2021-04-15 02:31:07,394 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2682 transitions. Word has length 19 [2021-04-15 02:31:07,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:07,394 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2682 transitions. [2021-04-15 02:31:07,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:07,394 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2682 transitions. [2021-04-15 02:31:07,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:07,395 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:07,395 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:07,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6671,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:07,595 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:07,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:07,596 INFO L82 PathProgramCache]: Analyzing trace with hash 49617522, now seen corresponding path program 214 times [2021-04-15 02:31:07,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:07,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758682932] [2021-04-15 02:31:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:07,679 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:07,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758682932] [2021-04-15 02:31:07,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272913163] [2021-04-15 02:31:07,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:07,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:07,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:07,701 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:31:07,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:07,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:07,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:08,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:08,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:08,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:08,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:31:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:08,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:08,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:31:08,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762548648] [2021-04-15 02:31:08,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:08,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:08,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:08,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:08,054 INFO L87 Difference]: Start difference. First operand 896 states and 2682 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:08,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:08,445 INFO L93 Difference]: Finished difference Result 1009 states and 2994 transitions. [2021-04-15 02:31:08,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:31:08,446 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:08,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:08,447 INFO L225 Difference]: With dead ends: 1009 [2021-04-15 02:31:08,447 INFO L226 Difference]: Without dead ends: 995 [2021-04-15 02:31:08,447 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 293.9ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:31:08,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-04-15 02:31:08,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 972. [2021-04-15 02:31:08,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 3.015447991761071) internal successors, (2928), 971 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:08,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 2928 transitions. [2021-04-15 02:31:08,456 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 2928 transitions. Word has length 19 [2021-04-15 02:31:08,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:08,456 INFO L480 AbstractCegarLoop]: Abstraction has 972 states and 2928 transitions. [2021-04-15 02:31:08,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:08,456 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 2928 transitions. [2021-04-15 02:31:08,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:08,457 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:08,457 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:08,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6841 [2021-04-15 02:31:08,672 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:08,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:08,672 INFO L82 PathProgramCache]: Analyzing trace with hash 908492052, now seen corresponding path program 215 times [2021-04-15 02:31:08,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:08,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726505661] [2021-04-15 02:31:08,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:08,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726505661] [2021-04-15 02:31:08,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117365191] [2021-04-15 02:31:08,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:08,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:31:08,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:08,793 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:31:08,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:09,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:09,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:09,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:09,269 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:31:09,269 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:31:09,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:31:09,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:31:09,409 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:31:09,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:09,410 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:31:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:09,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:09,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:31:09,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810503047] [2021-04-15 02:31:09,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:09,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:09,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:09,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:09,439 INFO L87 Difference]: Start difference. First operand 972 states and 2928 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:10,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:10,420 INFO L93 Difference]: Finished difference Result 1109 states and 3246 transitions. [2021-04-15 02:31:10,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 02:31:10,420 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:10,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:10,421 INFO L225 Difference]: With dead ends: 1109 [2021-04-15 02:31:10,421 INFO L226 Difference]: Without dead ends: 1099 [2021-04-15 02:31:10,422 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 751.0ms TimeCoverageRelationStatistics Valid=291, Invalid=2259, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 02:31:10,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-04-15 02:31:10,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 976. [2021-04-15 02:31:10,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 3.0194871794871796) internal successors, (2944), 975 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:10,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 2944 transitions. [2021-04-15 02:31:10,431 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 2944 transitions. Word has length 19 [2021-04-15 02:31:10,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:10,431 INFO L480 AbstractCegarLoop]: Abstraction has 976 states and 2944 transitions. [2021-04-15 02:31:10,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:10,431 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 2944 transitions. [2021-04-15 02:31:10,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:10,432 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:10,432 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:10,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6892 [2021-04-15 02:31:10,647 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:10,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:10,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1675861936, now seen corresponding path program 216 times [2021-04-15 02:31:10,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:10,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831004051] [2021-04-15 02:31:10,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:10,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:10,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831004051] [2021-04-15 02:31:10,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602265863] [2021-04-15 02:31:10,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:10,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:31:10,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:10,748 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:31:10,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:11,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:11,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:11,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:11,224 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:31:11,224 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:31:11,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:31:11,297 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:31:11,313 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:31:11,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:11,314 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:31:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:11,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:11,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:31:11,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091518471] [2021-04-15 02:31:11,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:11,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:11,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:11,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:11,345 INFO L87 Difference]: Start difference. First operand 976 states and 2944 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:12,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:12,210 INFO L93 Difference]: Finished difference Result 1144 states and 3334 transitions. [2021-04-15 02:31:12,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 02:31:12,211 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:12,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:12,212 INFO L225 Difference]: With dead ends: 1144 [2021-04-15 02:31:12,213 INFO L226 Difference]: Without dead ends: 1134 [2021-04-15 02:31:12,213 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 648.8ms TimeCoverageRelationStatistics Valid=229, Invalid=2027, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 02:31:12,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2021-04-15 02:31:12,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1010. [2021-04-15 02:31:12,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 3.0297324083250743) internal successors, (3057), 1009 states have internal predecessors, (3057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:12,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 3057 transitions. [2021-04-15 02:31:12,223 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 3057 transitions. Word has length 19 [2021-04-15 02:31:12,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:12,223 INFO L480 AbstractCegarLoop]: Abstraction has 1010 states and 3057 transitions. [2021-04-15 02:31:12,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:12,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 3057 transitions. [2021-04-15 02:31:12,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:12,224 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:12,224 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:12,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7020,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:12,425 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:12,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:12,425 INFO L82 PathProgramCache]: Analyzing trace with hash -186456940, now seen corresponding path program 217 times [2021-04-15 02:31:12,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:12,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820425590] [2021-04-15 02:31:12,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:12,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820425590] [2021-04-15 02:31:12,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464351791] [2021-04-15 02:31:12,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:12,524 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:31:12,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:12,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:12,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:12,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:13,042 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:31:13,042 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:31:13,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:31:13,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:31:13,140 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:31:13,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:13,141 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:31:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:13,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:13,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:31:13,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716886012] [2021-04-15 02:31:13,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:13,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:13,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:13,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:13,171 INFO L87 Difference]: Start difference. First operand 1010 states and 3057 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:14,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:14,143 INFO L93 Difference]: Finished difference Result 1206 states and 3490 transitions. [2021-04-15 02:31:14,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 02:31:14,143 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:14,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:14,144 INFO L225 Difference]: With dead ends: 1206 [2021-04-15 02:31:14,144 INFO L226 Difference]: Without dead ends: 1191 [2021-04-15 02:31:14,145 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 714.4ms TimeCoverageRelationStatistics Valid=268, Invalid=1988, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 02:31:14,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-04-15 02:31:14,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1047. [2021-04-15 02:31:14,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.0315487571701722) internal successors, (3171), 1046 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:14,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3171 transitions. [2021-04-15 02:31:14,154 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3171 transitions. Word has length 19 [2021-04-15 02:31:14,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:14,154 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3171 transitions. [2021-04-15 02:31:14,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:14,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3171 transitions. [2021-04-15 02:31:14,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:14,155 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:14,155 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:14,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7116,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:14,356 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:14,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:14,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1259542320, now seen corresponding path program 218 times [2021-04-15 02:31:14,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:14,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632843536] [2021-04-15 02:31:14,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:14,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632843536] [2021-04-15 02:31:14,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015531625] [2021-04-15 02:31:14,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:14,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:31:14,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:14,466 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:31:14,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:14,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:14,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:14,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:14,971 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:31:14,971 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:31:14,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:31:15,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:31:15,083 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:31:15,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:15,084 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:31:15,114 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:15,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:15,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:31:15,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524998661] [2021-04-15 02:31:15,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:31:15,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:15,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:31:15,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:31:15,114 INFO L87 Difference]: Start difference. First operand 1047 states and 3171 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:16,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:16,280 INFO L93 Difference]: Finished difference Result 1314 states and 3702 transitions. [2021-04-15 02:31:16,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-15 02:31:16,280 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:16,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:16,282 INFO L225 Difference]: With dead ends: 1314 [2021-04-15 02:31:16,282 INFO L226 Difference]: Without dead ends: 1289 [2021-04-15 02:31:16,282 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 997.4ms TimeCoverageRelationStatistics Valid=426, Invalid=3114, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 02:31:16,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2021-04-15 02:31:16,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1050. [2021-04-15 02:31:16,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 3.0276453765490943) internal successors, (3176), 1049 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:16,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 3176 transitions. [2021-04-15 02:31:16,298 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 3176 transitions. Word has length 19 [2021-04-15 02:31:16,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:16,298 INFO L480 AbstractCegarLoop]: Abstraction has 1050 states and 3176 transitions. [2021-04-15 02:31:16,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:16,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 3176 transitions. [2021-04-15 02:31:16,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:16,299 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:16,299 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:16,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7236 [2021-04-15 02:31:16,500 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:16,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:16,500 INFO L82 PathProgramCache]: Analyzing trace with hash -165450732, now seen corresponding path program 219 times [2021-04-15 02:31:16,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:16,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124892467] [2021-04-15 02:31:16,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:16,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124892467] [2021-04-15 02:31:16,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363548900] [2021-04-15 02:31:16,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:16,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:31:16,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:16,620 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:31:16,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:16,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:16,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:16,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:17,093 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:31:17,094 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:31:17,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:31:17,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:31:17,280 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:31:17,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:17,281 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:31:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:17,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:17,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:31:17,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384590103] [2021-04-15 02:31:17,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:31:17,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:17,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:31:17,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:31:17,312 INFO L87 Difference]: Start difference. First operand 1050 states and 3176 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:18,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:18,121 INFO L93 Difference]: Finished difference Result 1208 states and 3517 transitions. [2021-04-15 02:31:18,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:31:18,122 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:18,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:18,123 INFO L225 Difference]: With dead ends: 1208 [2021-04-15 02:31:18,123 INFO L226 Difference]: Without dead ends: 1193 [2021-04-15 02:31:18,123 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 806.9ms TimeCoverageRelationStatistics Valid=310, Invalid=1852, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 02:31:18,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-04-15 02:31:18,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1057. [2021-04-15 02:31:18,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 3.024621212121212) internal successors, (3194), 1056 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:18,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 3194 transitions. [2021-04-15 02:31:18,134 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 3194 transitions. Word has length 19 [2021-04-15 02:31:18,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:18,134 INFO L480 AbstractCegarLoop]: Abstraction has 1057 states and 3194 transitions. [2021-04-15 02:31:18,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:18,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 3194 transitions. [2021-04-15 02:31:18,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:18,135 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:18,135 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:18,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7342 [2021-04-15 02:31:18,335 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:18,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:18,335 INFO L82 PathProgramCache]: Analyzing trace with hash -608349872, now seen corresponding path program 220 times [2021-04-15 02:31:18,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:18,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730607691] [2021-04-15 02:31:18,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:18,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:18,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730607691] [2021-04-15 02:31:18,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180118565] [2021-04-15 02:31:18,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:18,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:18,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:18,478 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:31:18,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:18,791 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:18,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:19,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:19,150 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:31:19,151 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:31:19,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:31:19,392 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:31:19,408 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:31:19,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:19,409 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:31:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:19,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:19,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:31:19,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965939181] [2021-04-15 02:31:19,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:31:19,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:19,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:31:19,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:31:19,439 INFO L87 Difference]: Start difference. First operand 1057 states and 3194 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:20,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:20,325 INFO L93 Difference]: Finished difference Result 1268 states and 3657 transitions. [2021-04-15 02:31:20,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:31:20,326 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:20,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:20,327 INFO L225 Difference]: With dead ends: 1268 [2021-04-15 02:31:20,327 INFO L226 Difference]: Without dead ends: 1253 [2021-04-15 02:31:20,327 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 938.7ms TimeCoverageRelationStatistics Valid=314, Invalid=1848, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 02:31:20,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2021-04-15 02:31:20,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 1056. [2021-04-15 02:31:20,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 3.0274881516587677) internal successors, (3194), 1055 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:20,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 3194 transitions. [2021-04-15 02:31:20,337 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 3194 transitions. Word has length 19 [2021-04-15 02:31:20,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:20,338 INFO L480 AbstractCegarLoop]: Abstraction has 1056 states and 3194 transitions. [2021-04-15 02:31:20,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:20,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 3194 transitions. [2021-04-15 02:31:20,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:20,338 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:20,339 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:20,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7465 [2021-04-15 02:31:20,541 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:20,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:20,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1453321324, now seen corresponding path program 221 times [2021-04-15 02:31:20,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:20,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251675321] [2021-04-15 02:31:20,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:20,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251675321] [2021-04-15 02:31:20,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565110004] [2021-04-15 02:31:20,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:20,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:31:20,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:20,671 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 02:31:20,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:20,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:20,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:21,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:21,188 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:31:21,189 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:31:21,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:31:21,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:31:21,312 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:31:21,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:21,312 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-04-15 02:31:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:21,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:21,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:31:21,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584983440] [2021-04-15 02:31:21,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:31:21,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:21,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:31:21,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:31:21,343 INFO L87 Difference]: Start difference. First operand 1056 states and 3194 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:22,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:22,097 INFO L93 Difference]: Finished difference Result 1209 states and 3557 transitions. [2021-04-15 02:31:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:31:22,098 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:22,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:22,099 INFO L225 Difference]: With dead ends: 1209 [2021-04-15 02:31:22,099 INFO L226 Difference]: Without dead ends: 1204 [2021-04-15 02:31:22,099 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 773.7ms TimeCoverageRelationStatistics Valid=244, Invalid=1478, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:31:22,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-04-15 02:31:22,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1058. [2021-04-15 02:31:22,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 3.024597918637654) internal successors, (3197), 1057 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:22,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3197 transitions. [2021-04-15 02:31:22,110 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3197 transitions. Word has length 19 [2021-04-15 02:31:22,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:22,110 INFO L480 AbstractCegarLoop]: Abstraction has 1058 states and 3197 transitions. [2021-04-15 02:31:22,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:22,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3197 transitions. [2021-04-15 02:31:22,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:22,111 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:22,111 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:22,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7737 [2021-04-15 02:31:22,311 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:22,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:22,312 INFO L82 PathProgramCache]: Analyzing trace with hash -2016450674, now seen corresponding path program 222 times [2021-04-15 02:31:22,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:22,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030870325] [2021-04-15 02:31:22,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:22,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030870325] [2021-04-15 02:31:22,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62012590] [2021-04-15 02:31:22,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:22,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:31:22,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:22,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:31:22,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:22,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:22,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:23,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:23,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:23,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:23,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:23,047 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:23,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:23,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:31:23,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53193073] [2021-04-15 02:31:23,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:31:23,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:23,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:31:23,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:31:23,048 INFO L87 Difference]: Start difference. First operand 1058 states and 3197 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:23,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:23,540 INFO L93 Difference]: Finished difference Result 1126 states and 3328 transitions. [2021-04-15 02:31:23,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:31:23,541 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:23,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:23,542 INFO L225 Difference]: With dead ends: 1126 [2021-04-15 02:31:23,542 INFO L226 Difference]: Without dead ends: 1113 [2021-04-15 02:31:23,542 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 488.6ms TimeCoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:31:23,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-04-15 02:31:23,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1063. [2021-04-15 02:31:23,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 3.019774011299435) internal successors, (3207), 1062 states have internal predecessors, (3207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:23,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 3207 transitions. [2021-04-15 02:31:23,552 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 3207 transitions. Word has length 20 [2021-04-15 02:31:23,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:23,552 INFO L480 AbstractCegarLoop]: Abstraction has 1063 states and 3207 transitions. [2021-04-15 02:31:23,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:23,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 3207 transitions. [2021-04-15 02:31:23,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:23,553 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:23,553 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:23,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7852 [2021-04-15 02:31:23,753 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:23,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:23,754 INFO L82 PathProgramCache]: Analyzing trace with hash -2008627890, now seen corresponding path program 223 times [2021-04-15 02:31:23,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:23,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375167783] [2021-04-15 02:31:23,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:23,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375167783] [2021-04-15 02:31:23,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067414717] [2021-04-15 02:31:23,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:23,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:31:23,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:24,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:24,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:24,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:24,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:24,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:24,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:24,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:24,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:31:24,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133106698] [2021-04-15 02:31:24,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:24,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:24,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:24,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:24,359 INFO L87 Difference]: Start difference. First operand 1063 states and 3207 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:24,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:24,849 INFO L93 Difference]: Finished difference Result 1193 states and 3423 transitions. [2021-04-15 02:31:24,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:31:24,850 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:24,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:24,851 INFO L225 Difference]: With dead ends: 1193 [2021-04-15 02:31:24,851 INFO L226 Difference]: Without dead ends: 1184 [2021-04-15 02:31:24,851 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 336.8ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:31:24,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-04-15 02:31:24,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1065. [2021-04-15 02:31:24,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 3.0197368421052633) internal successors, (3213), 1064 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:24,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 3213 transitions. [2021-04-15 02:31:24,861 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 3213 transitions. Word has length 20 [2021-04-15 02:31:24,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:24,861 INFO L480 AbstractCegarLoop]: Abstraction has 1065 states and 3213 transitions. [2021-04-15 02:31:24,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:24,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 3213 transitions. [2021-04-15 02:31:24,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:24,862 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:24,862 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:25,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7966,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:25,063 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:25,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:25,063 INFO L82 PathProgramCache]: Analyzing trace with hash 560859948, now seen corresponding path program 224 times [2021-04-15 02:31:25,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:25,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607995654] [2021-04-15 02:31:25,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:25,144 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:25,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607995654] [2021-04-15 02:31:25,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090732655] [2021-04-15 02:31:25,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:25,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:31:25,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:25,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:31:25,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:25,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:25,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:26,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:26,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:26,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:26,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:26,086 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:26,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:26,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:31:26,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686811631] [2021-04-15 02:31:26,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:26,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:26,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:26,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:26,086 INFO L87 Difference]: Start difference. First operand 1065 states and 3213 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:26,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:26,589 INFO L93 Difference]: Finished difference Result 1199 states and 3459 transitions. [2021-04-15 02:31:26,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:31:26,589 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:26,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:26,591 INFO L225 Difference]: With dead ends: 1199 [2021-04-15 02:31:26,591 INFO L226 Difference]: Without dead ends: 1194 [2021-04-15 02:31:26,591 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 374.3ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:31:26,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-04-15 02:31:26,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1065. [2021-04-15 02:31:26,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 3.0197368421052633) internal successors, (3213), 1064 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:26,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 3213 transitions. [2021-04-15 02:31:26,601 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 3213 transitions. Word has length 20 [2021-04-15 02:31:26,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:26,601 INFO L480 AbstractCegarLoop]: Abstraction has 1065 states and 3213 transitions. [2021-04-15 02:31:26,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:26,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 3213 transitions. [2021-04-15 02:31:26,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:26,602 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:26,602 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:26,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8051 [2021-04-15 02:31:26,809 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:26,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:26,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1075164181, now seen corresponding path program 225 times [2021-04-15 02:31:26,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:26,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814838320] [2021-04-15 02:31:26,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:26,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814838320] [2021-04-15 02:31:26,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299869706] [2021-04-15 02:31:26,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:26,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:31:26,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:26,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:31:26,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:26,915 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:26,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:26,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:31:26,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088070507] [2021-04-15 02:31:26,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:31:26,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:26,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:31:26,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:31:26,916 INFO L87 Difference]: Start difference. First operand 1065 states and 3213 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:26,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:26,979 INFO L93 Difference]: Finished difference Result 1365 states and 3760 transitions. [2021-04-15 02:31:26,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:31:26,979 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:26,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:26,981 INFO L225 Difference]: With dead ends: 1365 [2021-04-15 02:31:26,981 INFO L226 Difference]: Without dead ends: 1365 [2021-04-15 02:31:26,981 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:31:26,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-04-15 02:31:26,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1073. [2021-04-15 02:31:26,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0261194029850746) internal successors, (3244), 1072 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:26,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3244 transitions. [2021-04-15 02:31:26,993 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3244 transitions. Word has length 20 [2021-04-15 02:31:26,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:26,993 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 3244 transitions. [2021-04-15 02:31:26,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:26,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3244 transitions. [2021-04-15 02:31:26,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:26,994 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:26,994 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:27,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8326,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:27,194 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:27,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:27,195 INFO L82 PathProgramCache]: Analyzing trace with hash 421097848, now seen corresponding path program 226 times [2021-04-15 02:31:27,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:27,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921329780] [2021-04-15 02:31:27,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:27,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921329780] [2021-04-15 02:31:27,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890365516] [2021-04-15 02:31:27,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:27,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:27,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:27,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:31:27,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:27,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:27,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:27,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:27,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:27,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:27,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:27,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:27,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:31:27,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325025526] [2021-04-15 02:31:27,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:27,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:27,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:27,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:27,851 INFO L87 Difference]: Start difference. First operand 1073 states and 3244 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:28,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:28,273 INFO L93 Difference]: Finished difference Result 1199 states and 3479 transitions. [2021-04-15 02:31:28,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:31:28,273 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:28,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:28,275 INFO L225 Difference]: With dead ends: 1199 [2021-04-15 02:31:28,275 INFO L226 Difference]: Without dead ends: 1194 [2021-04-15 02:31:28,275 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 367.9ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:31:28,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-04-15 02:31:28,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1079. [2021-04-15 02:31:28,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 3.031539888682746) internal successors, (3268), 1078 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:28,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 3268 transitions. [2021-04-15 02:31:28,285 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 3268 transitions. Word has length 20 [2021-04-15 02:31:28,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:28,285 INFO L480 AbstractCegarLoop]: Abstraction has 1079 states and 3268 transitions. [2021-04-15 02:31:28,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:28,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 3268 transitions. [2021-04-15 02:31:28,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:28,286 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:28,286 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:28,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8327 [2021-04-15 02:31:28,501 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:28,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:28,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1304381610, now seen corresponding path program 227 times [2021-04-15 02:31:28,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:28,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360234913] [2021-04-15 02:31:28,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:28,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:28,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360234913] [2021-04-15 02:31:28,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618428155] [2021-04-15 02:31:28,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:31:28,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:31:28,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:28,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:31:28,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:29,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:29,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:29,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:29,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:29,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:29,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:29,257 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:29,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:29,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:31:29,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799754619] [2021-04-15 02:31:29,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:29,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:29,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:29,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:29,258 INFO L87 Difference]: Start difference. First operand 1079 states and 3268 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:29,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:29,785 INFO L93 Difference]: Finished difference Result 1210 states and 3510 transitions. [2021-04-15 02:31:29,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:31:29,786 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:29,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:29,787 INFO L225 Difference]: With dead ends: 1210 [2021-04-15 02:31:29,787 INFO L226 Difference]: Without dead ends: 1201 [2021-04-15 02:31:29,787 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 438.0ms TimeCoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:31:29,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-04-15 02:31:29,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1081. [2021-04-15 02:31:29,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 3.0296296296296297) internal successors, (3272), 1080 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:29,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 3272 transitions. [2021-04-15 02:31:29,800 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 3272 transitions. Word has length 20 [2021-04-15 02:31:29,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:29,800 INFO L480 AbstractCegarLoop]: Abstraction has 1081 states and 3272 transitions. [2021-04-15 02:31:29,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:29,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 3272 transitions. [2021-04-15 02:31:29,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:29,801 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:29,801 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:30,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8415,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:30,001 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:30,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:30,002 INFO L82 PathProgramCache]: Analyzing trace with hash 185023386, now seen corresponding path program 228 times [2021-04-15 02:31:30,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:30,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359884846] [2021-04-15 02:31:30,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:30,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359884846] [2021-04-15 02:31:30,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445111938] [2021-04-15 02:31:30,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:30,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:31:30,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:30,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:31:30,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:30,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:30,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:30,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:30,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:30,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:30,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:30,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:30,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:31:30,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284206794] [2021-04-15 02:31:30,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:30,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:30,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:30,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:30,679 INFO L87 Difference]: Start difference. First operand 1081 states and 3272 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:30,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:30,953 INFO L93 Difference]: Finished difference Result 1169 states and 3442 transitions. [2021-04-15 02:31:30,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:31:30,953 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:30,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:30,955 INFO L225 Difference]: With dead ends: 1169 [2021-04-15 02:31:30,955 INFO L226 Difference]: Without dead ends: 1164 [2021-04-15 02:31:30,955 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 318.9ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:31:30,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-04-15 02:31:30,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1082. [2021-04-15 02:31:30,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 1081 states have (on average 3.0296022201665127) internal successors, (3275), 1081 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:30,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 3275 transitions. [2021-04-15 02:31:30,965 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 3275 transitions. Word has length 20 [2021-04-15 02:31:30,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:30,965 INFO L480 AbstractCegarLoop]: Abstraction has 1082 states and 3275 transitions. [2021-04-15 02:31:30,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:30,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 3275 transitions. [2021-04-15 02:31:30,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:30,966 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:30,966 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:31,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8519 [2021-04-15 02:31:31,167 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:31,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:31,167 INFO L82 PathProgramCache]: Analyzing trace with hash -706298245, now seen corresponding path program 229 times [2021-04-15 02:31:31,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:31,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439723938] [2021-04-15 02:31:31,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:31,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439723938] [2021-04-15 02:31:31,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140721326] [2021-04-15 02:31:31,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:31,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:31:31,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:31,270 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:31,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:31,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:31:31,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188917374] [2021-04-15 02:31:31,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:31:31,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:31,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:31:31,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:31:31,270 INFO L87 Difference]: Start difference. First operand 1082 states and 3275 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:31,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:31,354 INFO L93 Difference]: Finished difference Result 1465 states and 4016 transitions. [2021-04-15 02:31:31,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:31:31,354 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:31,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:31,356 INFO L225 Difference]: With dead ends: 1465 [2021-04-15 02:31:31,356 INFO L226 Difference]: Without dead ends: 1465 [2021-04-15 02:31:31,356 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:31:31,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-04-15 02:31:31,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 1072. [2021-04-15 02:31:31,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 3.022408963585434) internal successors, (3237), 1071 states have internal predecessors, (3237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:31,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 3237 transitions. [2021-04-15 02:31:31,368 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 3237 transitions. Word has length 20 [2021-04-15 02:31:31,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:31,368 INFO L480 AbstractCegarLoop]: Abstraction has 1072 states and 3237 transitions. [2021-04-15 02:31:31,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:31,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 3237 transitions. [2021-04-15 02:31:31,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:31,369 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:31,369 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:31,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8647,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:31,573 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:31,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:31,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1248078420, now seen corresponding path program 230 times [2021-04-15 02:31:31,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:31,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217915487] [2021-04-15 02:31:31,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:31:31,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217915487] [2021-04-15 02:31:31,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697053896] [2021-04-15 02:31:31,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:31,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:31:31,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:31,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:31:31,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:31,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:31,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:32,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:32,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:32,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:32,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:32,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:32,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-04-15 02:31:32,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417896976] [2021-04-15 02:31:32,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:31:32,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:32,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:31:32,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:31:32,098 INFO L87 Difference]: Start difference. First operand 1072 states and 3237 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:32,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:32,407 INFO L93 Difference]: Finished difference Result 1095 states and 3276 transitions. [2021-04-15 02:31:32,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:31:32,407 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:32,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:32,408 INFO L225 Difference]: With dead ends: 1095 [2021-04-15 02:31:32,408 INFO L226 Difference]: Without dead ends: 1080 [2021-04-15 02:31:32,409 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 374.4ms TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:31:32,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-04-15 02:31:32,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1069. [2021-04-15 02:31:32,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.019662921348315) internal successors, (3225), 1068 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:32,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3225 transitions. [2021-04-15 02:31:32,418 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3225 transitions. Word has length 20 [2021-04-15 02:31:32,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:32,418 INFO L480 AbstractCegarLoop]: Abstraction has 1069 states and 3225 transitions. [2021-04-15 02:31:32,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:32,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3225 transitions. [2021-04-15 02:31:32,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:32,419 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:32,419 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:32,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8648,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:32,620 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:32,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:32,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1296543798, now seen corresponding path program 231 times [2021-04-15 02:31:32,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:32,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685677466] [2021-04-15 02:31:32,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:32,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:32,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685677466] [2021-04-15 02:31:32,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193661518] [2021-04-15 02:31:32,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:32,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:31:32,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:32,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:31:32,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:33,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:33,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:33,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:33,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:33,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:33,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:33,644 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:33,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:33,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:31:33,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391737729] [2021-04-15 02:31:33,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:33,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:33,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:33,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:33,644 INFO L87 Difference]: Start difference. First operand 1069 states and 3225 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:34,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:34,066 INFO L93 Difference]: Finished difference Result 1190 states and 3432 transitions. [2021-04-15 02:31:34,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:31:34,066 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:34,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:34,068 INFO L225 Difference]: With dead ends: 1190 [2021-04-15 02:31:34,068 INFO L226 Difference]: Without dead ends: 1167 [2021-04-15 02:31:34,068 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 448.1ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:31:34,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-04-15 02:31:34,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1068. [2021-04-15 02:31:34,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 3.0159325210871604) internal successors, (3218), 1067 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:34,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 3218 transitions. [2021-04-15 02:31:34,078 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 3218 transitions. Word has length 20 [2021-04-15 02:31:34,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:34,078 INFO L480 AbstractCegarLoop]: Abstraction has 1068 states and 3218 transitions. [2021-04-15 02:31:34,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:34,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 3218 transitions. [2021-04-15 02:31:34,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:34,079 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:34,079 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:34,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8724,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:34,280 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:34,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:34,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1566815602, now seen corresponding path program 232 times [2021-04-15 02:31:34,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:34,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808242541] [2021-04-15 02:31:34,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:34,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808242541] [2021-04-15 02:31:34,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096751567] [2021-04-15 02:31:34,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:34,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:34,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:34,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:31:34,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:34,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:34,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:34,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:34,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:34,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:34,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:34,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:34,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:31:34,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610004326] [2021-04-15 02:31:34,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:34,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:34,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:34,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:34,904 INFO L87 Difference]: Start difference. First operand 1068 states and 3218 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:35,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:35,262 INFO L93 Difference]: Finished difference Result 1170 states and 3412 transitions. [2021-04-15 02:31:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:31:35,262 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:35,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:35,264 INFO L225 Difference]: With dead ends: 1170 [2021-04-15 02:31:35,264 INFO L226 Difference]: Without dead ends: 1161 [2021-04-15 02:31:35,264 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 324.7ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:31:35,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-04-15 02:31:35,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1073. [2021-04-15 02:31:35,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0167910447761193) internal successors, (3234), 1072 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:35,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3234 transitions. [2021-04-15 02:31:35,274 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3234 transitions. Word has length 20 [2021-04-15 02:31:35,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:35,274 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 3234 transitions. [2021-04-15 02:31:35,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:35,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3234 transitions. [2021-04-15 02:31:35,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:35,275 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:35,275 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:35,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9021,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:35,476 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:35,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:35,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1002672236, now seen corresponding path program 233 times [2021-04-15 02:31:35,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:35,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119570928] [2021-04-15 02:31:35,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:35,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119570928] [2021-04-15 02:31:35,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538115805] [2021-04-15 02:31:35,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:35,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:31:35,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:35,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:31:35,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:35,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:35,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:36,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:36,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:36,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:36,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:36,123 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:36,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:36,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:31:36,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867599328] [2021-04-15 02:31:36,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:36,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:36,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:36,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:36,124 INFO L87 Difference]: Start difference. First operand 1073 states and 3234 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:36,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:36,575 INFO L93 Difference]: Finished difference Result 1158 states and 3390 transitions. [2021-04-15 02:31:36,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:31:36,575 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:36,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:36,577 INFO L225 Difference]: With dead ends: 1158 [2021-04-15 02:31:36,577 INFO L226 Difference]: Without dead ends: 1153 [2021-04-15 02:31:36,577 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 341.2ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:31:36,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-04-15 02:31:36,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1073. [2021-04-15 02:31:36,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0167910447761193) internal successors, (3234), 1072 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:36,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3234 transitions. [2021-04-15 02:31:36,587 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3234 transitions. Word has length 20 [2021-04-15 02:31:36,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:36,587 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 3234 transitions. [2021-04-15 02:31:36,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:36,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3234 transitions. [2021-04-15 02:31:36,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:36,588 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:36,588 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:36,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9134,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:36,789 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:36,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:36,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1802890064, now seen corresponding path program 234 times [2021-04-15 02:31:36,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:36,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851444263] [2021-04-15 02:31:36,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:36,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851444263] [2021-04-15 02:31:36,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227976985] [2021-04-15 02:31:36,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:36,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:31:36,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:36,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:31:36,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:37,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:37,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:37,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:37,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:37,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:37,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:37,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:37,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:31:37,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456325334] [2021-04-15 02:31:37,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:31:37,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:37,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:31:37,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:31:37,555 INFO L87 Difference]: Start difference. First operand 1073 states and 3234 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:38,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:38,246 INFO L93 Difference]: Finished difference Result 1194 states and 3443 transitions. [2021-04-15 02:31:38,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:31:38,247 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:38,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:38,248 INFO L225 Difference]: With dead ends: 1194 [2021-04-15 02:31:38,248 INFO L226 Difference]: Without dead ends: 1177 [2021-04-15 02:31:38,248 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 433.0ms TimeCoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:31:38,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-04-15 02:31:38,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1073. [2021-04-15 02:31:38,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0065298507462686) internal successors, (3223), 1072 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:38,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3223 transitions. [2021-04-15 02:31:38,259 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3223 transitions. Word has length 20 [2021-04-15 02:31:38,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:38,259 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 3223 transitions. [2021-04-15 02:31:38,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:38,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3223 transitions. [2021-04-15 02:31:38,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:38,260 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:38,260 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:38,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9229,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:38,460 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:38,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:38,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1600755601, now seen corresponding path program 235 times [2021-04-15 02:31:38,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:38,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243304358] [2021-04-15 02:31:38,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:38,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243304358] [2021-04-15 02:31:38,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114944265] [2021-04-15 02:31:38,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:38,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:38,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:31:38,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:38,559 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:38,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:38,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:31:38,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525393045] [2021-04-15 02:31:38,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:31:38,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:38,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:31:38,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:31:38,560 INFO L87 Difference]: Start difference. First operand 1073 states and 3223 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:38,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:38,639 INFO L93 Difference]: Finished difference Result 1408 states and 3883 transitions. [2021-04-15 02:31:38,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:31:38,639 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:38,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:38,640 INFO L225 Difference]: With dead ends: 1408 [2021-04-15 02:31:38,641 INFO L226 Difference]: Without dead ends: 1408 [2021-04-15 02:31:38,641 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:31:38,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-04-15 02:31:38,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1089. [2021-04-15 02:31:38,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1088 states have (on average 3.011029411764706) internal successors, (3276), 1088 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:38,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 3276 transitions. [2021-04-15 02:31:38,652 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 3276 transitions. Word has length 20 [2021-04-15 02:31:38,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:38,652 INFO L480 AbstractCegarLoop]: Abstraction has 1089 states and 3276 transitions. [2021-04-15 02:31:38,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:38,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 3276 transitions. [2021-04-15 02:31:38,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:38,653 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:38,653 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:38,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9389 [2021-04-15 02:31:38,853 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:38,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:38,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1418991852, now seen corresponding path program 236 times [2021-04-15 02:31:38,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:38,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687843312] [2021-04-15 02:31:38,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:38,957 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:38,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687843312] [2021-04-15 02:31:38,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11793492] [2021-04-15 02:31:38,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:38,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:31:38,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:38,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:31:38,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:39,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:39,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:39,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:39,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:39,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:39,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:39,614 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:39,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:39,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:31:39,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613233884] [2021-04-15 02:31:39,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:31:39,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:39,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:31:39,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:31:39,615 INFO L87 Difference]: Start difference. First operand 1089 states and 3276 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:40,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:40,040 INFO L93 Difference]: Finished difference Result 1220 states and 3550 transitions. [2021-04-15 02:31:40,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:31:40,040 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:40,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:40,042 INFO L225 Difference]: With dead ends: 1220 [2021-04-15 02:31:40,042 INFO L226 Difference]: Without dead ends: 1215 [2021-04-15 02:31:40,042 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 388.3ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:31:40,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2021-04-15 02:31:40,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1090. [2021-04-15 02:31:40,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 3.0110192837465566) internal successors, (3279), 1089 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:40,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 3279 transitions. [2021-04-15 02:31:40,052 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 3279 transitions. Word has length 20 [2021-04-15 02:31:40,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:40,052 INFO L480 AbstractCegarLoop]: Abstraction has 1090 states and 3279 transitions. [2021-04-15 02:31:40,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:40,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 3279 transitions. [2021-04-15 02:31:40,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:40,053 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:40,053 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:40,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9390,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:40,254 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:40,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:40,254 INFO L82 PathProgramCache]: Analyzing trace with hash 2138611179, now seen corresponding path program 237 times [2021-04-15 02:31:40,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:40,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557603150] [2021-04-15 02:31:40,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:40,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557603150] [2021-04-15 02:31:40,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828403119] [2021-04-15 02:31:40,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:40,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:31:40,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:40,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:31:40,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:40,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:40,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:31:40,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706876081] [2021-04-15 02:31:40,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:31:40,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:40,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:31:40,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:31:40,360 INFO L87 Difference]: Start difference. First operand 1090 states and 3279 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:40,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:40,462 INFO L93 Difference]: Finished difference Result 1834 states and 5241 transitions. [2021-04-15 02:31:40,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:31:40,463 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:40,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:40,464 INFO L225 Difference]: With dead ends: 1834 [2021-04-15 02:31:40,464 INFO L226 Difference]: Without dead ends: 1834 [2021-04-15 02:31:40,465 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:31:40,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2021-04-15 02:31:40,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1516. [2021-04-15 02:31:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 3.0613861386138614) internal successors, (4638), 1515 states have internal predecessors, (4638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:40,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 4638 transitions. [2021-04-15 02:31:40,480 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 4638 transitions. Word has length 20 [2021-04-15 02:31:40,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:40,480 INFO L480 AbstractCegarLoop]: Abstraction has 1516 states and 4638 transitions. [2021-04-15 02:31:40,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:40,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 4638 transitions. [2021-04-15 02:31:40,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:40,482 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:40,482 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:40,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9525,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:40,682 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:40,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:40,682 INFO L82 PathProgramCache]: Analyzing trace with hash 67979132, now seen corresponding path program 238 times [2021-04-15 02:31:40,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:40,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111469656] [2021-04-15 02:31:40,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:40,756 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:31:40,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111469656] [2021-04-15 02:31:40,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970466888] [2021-04-15 02:31:40,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:40,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:40,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:40,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:31:40,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:41,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:41,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:41,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:41,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:41,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:41,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:41,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:41,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-04-15 02:31:41,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528743055] [2021-04-15 02:31:41,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:31:41,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:41,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:31:41,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:31:41,574 INFO L87 Difference]: Start difference. First operand 1516 states and 4638 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:41,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:41,940 INFO L93 Difference]: Finished difference Result 1539 states and 4677 transitions. [2021-04-15 02:31:41,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:31:41,940 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:41,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:41,942 INFO L225 Difference]: With dead ends: 1539 [2021-04-15 02:31:41,942 INFO L226 Difference]: Without dead ends: 1524 [2021-04-15 02:31:41,942 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 407.9ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:31:41,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-04-15 02:31:41,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1514. [2021-04-15 02:31:41,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 3.060806345009914) internal successors, (4631), 1513 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:41,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4631 transitions. [2021-04-15 02:31:41,957 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4631 transitions. Word has length 20 [2021-04-15 02:31:41,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:41,957 INFO L480 AbstractCegarLoop]: Abstraction has 1514 states and 4631 transitions. [2021-04-15 02:31:41,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:41,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4631 transitions. [2021-04-15 02:31:41,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:41,958 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:41,958 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:42,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9526,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:42,158 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:42,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:42,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1559917892, now seen corresponding path program 239 times [2021-04-15 02:31:42,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:42,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073860546] [2021-04-15 02:31:42,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:42,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:42,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073860546] [2021-04-15 02:31:42,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115087106] [2021-04-15 02:31:42,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:42,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:31:42,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:42,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:31:42,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:42,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:42,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:43,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:43,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:43,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:43,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:43,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:43,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:31:43,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250586372] [2021-04-15 02:31:43,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:31:43,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:43,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:31:43,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:31:43,169 INFO L87 Difference]: Start difference. First operand 1514 states and 4631 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:43,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:43,615 INFO L93 Difference]: Finished difference Result 1653 states and 4904 transitions. [2021-04-15 02:31:43,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:31:43,616 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:43,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:43,618 INFO L225 Difference]: With dead ends: 1653 [2021-04-15 02:31:43,618 INFO L226 Difference]: Without dead ends: 1640 [2021-04-15 02:31:43,618 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 435.9ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:31:43,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-04-15 02:31:43,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1514. [2021-04-15 02:31:43,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 3.056179775280899) internal successors, (4624), 1513 states have internal predecessors, (4624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:43,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4624 transitions. [2021-04-15 02:31:43,633 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4624 transitions. Word has length 20 [2021-04-15 02:31:43,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:43,633 INFO L480 AbstractCegarLoop]: Abstraction has 1514 states and 4624 transitions. [2021-04-15 02:31:43,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:43,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4624 transitions. [2021-04-15 02:31:43,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:43,634 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:43,634 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:43,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9747,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:43,835 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:43,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:43,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1232376888, now seen corresponding path program 240 times [2021-04-15 02:31:43,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:43,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671863401] [2021-04-15 02:31:43,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:43,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:43,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671863401] [2021-04-15 02:31:43,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52523779] [2021-04-15 02:31:43,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:43,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:31:43,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:43,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:31:43,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:44,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:44,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:44,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:44,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:44,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:44,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:44,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:44,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:31:44,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426881403] [2021-04-15 02:31:44,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:44,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:44,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:44,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:44,420 INFO L87 Difference]: Start difference. First operand 1514 states and 4624 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:44,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:44,813 INFO L93 Difference]: Finished difference Result 1609 states and 4809 transitions. [2021-04-15 02:31:44,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:31:44,814 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:44,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:44,816 INFO L225 Difference]: With dead ends: 1609 [2021-04-15 02:31:44,816 INFO L226 Difference]: Without dead ends: 1604 [2021-04-15 02:31:44,816 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 324.0ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:31:44,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-04-15 02:31:44,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1517. [2021-04-15 02:31:44,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 3.058047493403694) internal successors, (4636), 1516 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 4636 transitions. [2021-04-15 02:31:44,831 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 4636 transitions. Word has length 20 [2021-04-15 02:31:44,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:44,832 INFO L480 AbstractCegarLoop]: Abstraction has 1517 states and 4636 transitions. [2021-04-15 02:31:44,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 4636 transitions. [2021-04-15 02:31:44,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:44,833 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:44,833 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:45,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10017 [2021-04-15 02:31:45,033 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:45,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:45,034 INFO L82 PathProgramCache]: Analyzing trace with hash -493102570, now seen corresponding path program 241 times [2021-04-15 02:31:45,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:45,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367473530] [2021-04-15 02:31:45,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:45,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367473530] [2021-04-15 02:31:45,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374411631] [2021-04-15 02:31:45,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:45,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:31:45,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:45,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:45,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:45,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:45,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:45,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:45,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:45,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:45,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:31:45,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183510571] [2021-04-15 02:31:45,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:45,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:45,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:45,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:45,951 INFO L87 Difference]: Start difference. First operand 1517 states and 4636 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:46,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:46,366 INFO L93 Difference]: Finished difference Result 1614 states and 4819 transitions. [2021-04-15 02:31:46,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:31:46,367 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:46,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:46,368 INFO L225 Difference]: With dead ends: 1614 [2021-04-15 02:31:46,368 INFO L226 Difference]: Without dead ends: 1605 [2021-04-15 02:31:46,369 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 346.7ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:31:46,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-04-15 02:31:46,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1515. [2021-04-15 02:31:46,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 3.058784676354029) internal successors, (4631), 1514 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:46,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 4631 transitions. [2021-04-15 02:31:46,384 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 4631 transitions. Word has length 20 [2021-04-15 02:31:46,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:46,384 INFO L480 AbstractCegarLoop]: Abstraction has 1515 states and 4631 transitions. [2021-04-15 02:31:46,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:46,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 4631 transitions. [2021-04-15 02:31:46,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:46,385 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:46,385 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:46,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10115,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:46,586 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:46,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:46,586 INFO L82 PathProgramCache]: Analyzing trace with hash 996302426, now seen corresponding path program 242 times [2021-04-15 02:31:46,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:46,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243235961] [2021-04-15 02:31:46,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:46,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243235961] [2021-04-15 02:31:46,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76761221] [2021-04-15 02:31:46,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:46,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:31:46,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:46,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:31:46,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:47,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:47,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:47,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:47,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:47,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:47,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:47,558 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:47,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:47,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:31:47,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39649128] [2021-04-15 02:31:47,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:47,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:47,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:47,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:47,559 INFO L87 Difference]: Start difference. First operand 1515 states and 4631 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:47,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:47,844 INFO L93 Difference]: Finished difference Result 1606 states and 4806 transitions. [2021-04-15 02:31:47,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:31:47,845 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:47,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:47,846 INFO L225 Difference]: With dead ends: 1606 [2021-04-15 02:31:47,846 INFO L226 Difference]: Without dead ends: 1601 [2021-04-15 02:31:47,847 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 316.4ms TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:31:47,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2021-04-15 02:31:47,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1515. [2021-04-15 02:31:47,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 3.058784676354029) internal successors, (4631), 1514 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:47,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 4631 transitions. [2021-04-15 02:31:47,861 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 4631 transitions. Word has length 20 [2021-04-15 02:31:47,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:47,861 INFO L480 AbstractCegarLoop]: Abstraction has 1515 states and 4631 transitions. [2021-04-15 02:31:47,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:47,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 4631 transitions. [2021-04-15 02:31:47,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:47,863 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:47,863 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:48,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10330 [2021-04-15 02:31:48,065 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:48,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:48,065 INFO L82 PathProgramCache]: Analyzing trace with hash -76782954, now seen corresponding path program 243 times [2021-04-15 02:31:48,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:48,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970823331] [2021-04-15 02:31:48,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:48,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:48,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970823331] [2021-04-15 02:31:48,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325990085] [2021-04-15 02:31:48,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:48,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:31:48,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:48,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:31:48,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:48,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:48,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:48,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:48,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:48,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:48,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:48,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:48,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:31:48,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252634290] [2021-04-15 02:31:48,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:31:48,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:48,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:31:48,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:31:48,660 INFO L87 Difference]: Start difference. First operand 1515 states and 4631 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:49,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:49,100 INFO L93 Difference]: Finished difference Result 1644 states and 4888 transitions. [2021-04-15 02:31:49,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:31:49,101 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:49,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:49,103 INFO L225 Difference]: With dead ends: 1644 [2021-04-15 02:31:49,103 INFO L226 Difference]: Without dead ends: 1631 [2021-04-15 02:31:49,103 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 383.8ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:31:49,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-04-15 02:31:49,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1515. [2021-04-15 02:31:49,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 3.0574636723910174) internal successors, (4629), 1514 states have internal predecessors, (4629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:49,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 4629 transitions. [2021-04-15 02:31:49,117 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 4629 transitions. Word has length 20 [2021-04-15 02:31:49,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:49,118 INFO L480 AbstractCegarLoop]: Abstraction has 1515 states and 4629 transitions. [2021-04-15 02:31:49,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:49,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 4629 transitions. [2021-04-15 02:31:49,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:49,119 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:49,119 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:49,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10592,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:49,319 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:49,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:49,320 INFO L82 PathProgramCache]: Analyzing trace with hash 642836373, now seen corresponding path program 244 times [2021-04-15 02:31:49,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:49,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779998499] [2021-04-15 02:31:49,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:49,367 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:49,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779998499] [2021-04-15 02:31:49,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591494726] [2021-04-15 02:31:49,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:49,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:49,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:49,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:31:49,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:49,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:49,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:31:49,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613005276] [2021-04-15 02:31:49,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:31:49,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:49,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:31:49,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:31:49,431 INFO L87 Difference]: Start difference. First operand 1515 states and 4629 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:49,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:49,528 INFO L93 Difference]: Finished difference Result 1871 states and 5337 transitions. [2021-04-15 02:31:49,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:31:49,529 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:49,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:49,531 INFO L225 Difference]: With dead ends: 1871 [2021-04-15 02:31:49,531 INFO L226 Difference]: Without dead ends: 1871 [2021-04-15 02:31:49,531 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:31:49,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-04-15 02:31:49,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1073. [2021-04-15 02:31:49,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0) internal successors, (3216), 1072 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:49,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3216 transitions. [2021-04-15 02:31:49,544 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3216 transitions. Word has length 20 [2021-04-15 02:31:49,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:49,544 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 3216 transitions. [2021-04-15 02:31:49,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:49,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3216 transitions. [2021-04-15 02:31:49,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:49,545 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:49,545 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:49,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10658,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:49,745 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:49,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:49,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1017308634, now seen corresponding path program 245 times [2021-04-15 02:31:49,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:49,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042145861] [2021-04-15 02:31:49,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:49,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042145861] [2021-04-15 02:31:49,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425908337] [2021-04-15 02:31:49,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:49,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:31:49,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:49,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:31:49,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:50,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:50,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:50,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:50,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:50,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:50,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:50,549 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:50,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:50,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:31:50,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63054139] [2021-04-15 02:31:50,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:31:50,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:50,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:31:50,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:31:50,550 INFO L87 Difference]: Start difference. First operand 1073 states and 3216 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:51,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:51,060 INFO L93 Difference]: Finished difference Result 1252 states and 3621 transitions. [2021-04-15 02:31:51,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:31:51,060 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:51,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:51,062 INFO L225 Difference]: With dead ends: 1252 [2021-04-15 02:31:51,062 INFO L226 Difference]: Without dead ends: 1247 [2021-04-15 02:31:51,062 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 410.5ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:31:51,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-04-15 02:31:51,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1073. [2021-04-15 02:31:51,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0) internal successors, (3216), 1072 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:51,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3216 transitions. [2021-04-15 02:31:51,072 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3216 transitions. Word has length 20 [2021-04-15 02:31:51,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:51,072 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 3216 transitions. [2021-04-15 02:31:51,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:51,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3216 transitions. [2021-04-15 02:31:51,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:51,073 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:51,073 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:51,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10659 [2021-04-15 02:31:51,274 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:51,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:51,274 INFO L82 PathProgramCache]: Analyzing trace with hash 136490107, now seen corresponding path program 246 times [2021-04-15 02:31:51,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:51,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94569788] [2021-04-15 02:31:51,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:51,326 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:51,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94569788] [2021-04-15 02:31:51,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667378943] [2021-04-15 02:31:51,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:51,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:31:51,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:51,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:31:51,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:51,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:51,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:31:51,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960523222] [2021-04-15 02:31:51,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:31:51,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:51,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:31:51,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:31:51,397 INFO L87 Difference]: Start difference. First operand 1073 states and 3216 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:51,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:51,533 INFO L93 Difference]: Finished difference Result 1821 states and 5166 transitions. [2021-04-15 02:31:51,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:31:51,534 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:51,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:51,535 INFO L225 Difference]: With dead ends: 1821 [2021-04-15 02:31:51,535 INFO L226 Difference]: Without dead ends: 1821 [2021-04-15 02:31:51,536 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:31:51,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-04-15 02:31:51,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1372. [2021-04-15 02:31:51,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.047410649161196) internal successors, (4178), 1371 states have internal predecessors, (4178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:51,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4178 transitions. [2021-04-15 02:31:51,550 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4178 transitions. Word has length 20 [2021-04-15 02:31:51,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:51,550 INFO L480 AbstractCegarLoop]: Abstraction has 1372 states and 4178 transitions. [2021-04-15 02:31:51,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:51,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4178 transitions. [2021-04-15 02:31:51,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:51,551 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:51,551 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:51,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10850 [2021-04-15 02:31:51,751 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:51,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:51,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1110932366, now seen corresponding path program 247 times [2021-04-15 02:31:51,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:51,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119250821] [2021-04-15 02:31:51,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:51,839 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:51,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119250821] [2021-04-15 02:31:51,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160007349] [2021-04-15 02:31:51,839 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:51,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:31:51,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:52,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:52,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:52,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:52,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:52,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:52,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:52,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:52,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:31:52,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302639786] [2021-04-15 02:31:52,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:52,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:52,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:52,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:52,445 INFO L87 Difference]: Start difference. First operand 1372 states and 4178 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:52,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:52,818 INFO L93 Difference]: Finished difference Result 1418 states and 4257 transitions. [2021-04-15 02:31:52,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:31:52,819 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:52,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:52,820 INFO L225 Difference]: With dead ends: 1418 [2021-04-15 02:31:52,820 INFO L226 Difference]: Without dead ends: 1386 [2021-04-15 02:31:52,821 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 416.5ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:31:52,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2021-04-15 02:31:52,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1374. [2021-04-15 02:31:52,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.0458849235251275) internal successors, (4182), 1373 states have internal predecessors, (4182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:52,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4182 transitions. [2021-04-15 02:31:52,834 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4182 transitions. Word has length 20 [2021-04-15 02:31:52,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:52,834 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 4182 transitions. [2021-04-15 02:31:52,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:52,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4182 transitions. [2021-04-15 02:31:52,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:52,835 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:52,835 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:53,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10851 [2021-04-15 02:31:53,038 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:53,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:53,038 INFO L82 PathProgramCache]: Analyzing trace with hash -519119568, now seen corresponding path program 248 times [2021-04-15 02:31:53,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:53,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525105576] [2021-04-15 02:31:53,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:53,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525105576] [2021-04-15 02:31:53,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621298767] [2021-04-15 02:31:53,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:53,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:31:53,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:53,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:31:53,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:53,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:53,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:53,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:53,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:53,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:53,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:53,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:53,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:31:53,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031810657] [2021-04-15 02:31:53,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:53,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:53,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:53,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:53,667 INFO L87 Difference]: Start difference. First operand 1374 states and 4182 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:54,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:54,057 INFO L93 Difference]: Finished difference Result 1463 states and 4324 transitions. [2021-04-15 02:31:54,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:31:54,058 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:54,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:54,059 INFO L225 Difference]: With dead ends: 1463 [2021-04-15 02:31:54,059 INFO L226 Difference]: Without dead ends: 1440 [2021-04-15 02:31:54,059 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 367.5ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:31:54,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-04-15 02:31:54,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1374. [2021-04-15 02:31:54,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.0356882738528768) internal successors, (4168), 1373 states have internal predecessors, (4168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:54,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4168 transitions. [2021-04-15 02:31:54,072 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4168 transitions. Word has length 20 [2021-04-15 02:31:54,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:54,072 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 4168 transitions. [2021-04-15 02:31:54,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:54,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4168 transitions. [2021-04-15 02:31:54,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:54,073 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:54,073 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:54,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10991 [2021-04-15 02:31:54,274 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:54,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:54,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1592204948, now seen corresponding path program 249 times [2021-04-15 02:31:54,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:54,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119841492] [2021-04-15 02:31:54,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:54,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119841492] [2021-04-15 02:31:54,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819953785] [2021-04-15 02:31:54,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:54,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:31:54,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:54,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:31:54,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:54,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:54,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:54,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:54,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:54,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:54,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:54,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:54,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:31:54,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179065635] [2021-04-15 02:31:54,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:31:54,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:54,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:31:54,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:31:54,931 INFO L87 Difference]: Start difference. First operand 1374 states and 4168 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:55,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:55,483 INFO L93 Difference]: Finished difference Result 1493 states and 4350 transitions. [2021-04-15 02:31:55,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:31:55,484 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:55,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:55,485 INFO L225 Difference]: With dead ends: 1493 [2021-04-15 02:31:55,485 INFO L226 Difference]: Without dead ends: 1464 [2021-04-15 02:31:55,485 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 449.5ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:31:55,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-04-15 02:31:55,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1374. [2021-04-15 02:31:55,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.0276766205389656) internal successors, (4157), 1373 states have internal predecessors, (4157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:55,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4157 transitions. [2021-04-15 02:31:55,499 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4157 transitions. Word has length 20 [2021-04-15 02:31:55,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:55,499 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 4157 transitions. [2021-04-15 02:31:55,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:55,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4157 transitions. [2021-04-15 02:31:55,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:55,500 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:55,500 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:55,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11088,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:55,700 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:55,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:55,701 INFO L82 PathProgramCache]: Analyzing trace with hash -498113360, now seen corresponding path program 250 times [2021-04-15 02:31:55,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:55,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864561137] [2021-04-15 02:31:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:55,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864561137] [2021-04-15 02:31:55,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002869328] [2021-04-15 02:31:55,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:55,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:55,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:55,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:31:55,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:56,158 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:56,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:56,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:56,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:56,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:56,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:56,324 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:56,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:56,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:31:56,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799254662] [2021-04-15 02:31:56,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:31:56,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:56,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:31:56,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:31:56,325 INFO L87 Difference]: Start difference. First operand 1374 states and 4157 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:56,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:56,688 INFO L93 Difference]: Finished difference Result 1523 states and 4457 transitions. [2021-04-15 02:31:56,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:31:56,688 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:56,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:56,690 INFO L225 Difference]: With dead ends: 1523 [2021-04-15 02:31:56,690 INFO L226 Difference]: Without dead ends: 1508 [2021-04-15 02:31:56,690 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 398.9ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:31:56,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2021-04-15 02:31:56,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1374. [2021-04-15 02:31:56,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.0269482884195194) internal successors, (4156), 1373 states have internal predecessors, (4156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:56,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4156 transitions. [2021-04-15 02:31:56,703 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4156 transitions. Word has length 20 [2021-04-15 02:31:56,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:56,703 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 4156 transitions. [2021-04-15 02:31:56,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:56,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4156 transitions. [2021-04-15 02:31:56,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:56,704 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:56,704 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:56,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11190 [2021-04-15 02:31:56,905 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:56,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:56,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1134580214, now seen corresponding path program 251 times [2021-04-15 02:31:56,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:56,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321434189] [2021-04-15 02:31:56,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:56,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:57,011 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:57,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321434189] [2021-04-15 02:31:57,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564903670] [2021-04-15 02:31:57,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:57,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:31:57,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:57,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:31:57,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:57,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:57,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:57,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:57,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:57,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:57,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:57,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:57,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:31:57,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279797467] [2021-04-15 02:31:57,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:31:57,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:57,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:31:57,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:31:57,971 INFO L87 Difference]: Start difference. First operand 1374 states and 4156 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:58,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:58,623 INFO L93 Difference]: Finished difference Result 1525 states and 4427 transitions. [2021-04-15 02:31:58,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:31:58,624 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:58,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:58,625 INFO L225 Difference]: With dead ends: 1525 [2021-04-15 02:31:58,625 INFO L226 Difference]: Without dead ends: 1490 [2021-04-15 02:31:58,626 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 494.0ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:31:58,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-04-15 02:31:58,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1366. [2021-04-15 02:31:58,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 3.0278388278388277) internal successors, (4133), 1365 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:58,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 4133 transitions. [2021-04-15 02:31:58,638 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 4133 transitions. Word has length 20 [2021-04-15 02:31:58,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:58,638 INFO L480 AbstractCegarLoop]: Abstraction has 1366 states and 4133 transitions. [2021-04-15 02:31:58,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:58,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 4133 transitions. [2021-04-15 02:31:58,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:58,640 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:58,640 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:58,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11275,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:58,841 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:58,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:58,841 INFO L82 PathProgramCache]: Analyzing trace with hash 2107998158, now seen corresponding path program 252 times [2021-04-15 02:31:58,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:58,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705904522] [2021-04-15 02:31:58,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:58,928 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:58,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705904522] [2021-04-15 02:31:58,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913926224] [2021-04-15 02:31:58,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:58,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:31:58,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:58,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:31:58,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:59,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:59,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:59,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:59,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:59,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:59,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:59,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:59,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:31:59,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942792150] [2021-04-15 02:31:59,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:59,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:59,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:59,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:59,441 INFO L87 Difference]: Start difference. First operand 1366 states and 4133 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:59,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:59,893 INFO L93 Difference]: Finished difference Result 1431 states and 4256 transitions. [2021-04-15 02:31:59,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:31:59,893 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:31:59,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:59,895 INFO L225 Difference]: With dead ends: 1431 [2021-04-15 02:31:59,895 INFO L226 Difference]: Without dead ends: 1422 [2021-04-15 02:31:59,895 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 337.3ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:31:59,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-04-15 02:31:59,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1364. [2021-04-15 02:31:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1363 states have (on average 3.0234776228906823) internal successors, (4121), 1363 states have internal predecessors, (4121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:59,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 4121 transitions. [2021-04-15 02:31:59,907 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 4121 transitions. Word has length 20 [2021-04-15 02:31:59,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:59,907 INFO L480 AbstractCegarLoop]: Abstraction has 1364 states and 4121 transitions. [2021-04-15 02:31:59,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:59,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 4121 transitions. [2021-04-15 02:31:59,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:31:59,908 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:59,908 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:00,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11571 [2021-04-15 02:32:00,110 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:00,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:00,111 INFO L82 PathProgramCache]: Analyzing trace with hash 382518700, now seen corresponding path program 253 times [2021-04-15 02:32:00,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:00,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927540380] [2021-04-15 02:32:00,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:00,203 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:00,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927540380] [2021-04-15 02:32:00,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575409658] [2021-04-15 02:32:00,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:00,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:00,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:00,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:00,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:00,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:00,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:00,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:00,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:00,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:00,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:32:00,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429963255] [2021-04-15 02:32:00,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:32:00,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:00,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:32:00,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:32:00,845 INFO L87 Difference]: Start difference. First operand 1364 states and 4121 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:01,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:01,297 INFO L93 Difference]: Finished difference Result 1429 states and 4239 transitions. [2021-04-15 02:32:01,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:32:01,298 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:01,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:01,299 INFO L225 Difference]: With dead ends: 1429 [2021-04-15 02:32:01,300 INFO L226 Difference]: Without dead ends: 1424 [2021-04-15 02:32:01,300 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 354.3ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:32:01,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2021-04-15 02:32:01,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1364. [2021-04-15 02:32:01,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1363 states have (on average 3.0234776228906823) internal successors, (4121), 1363 states have internal predecessors, (4121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:01,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 4121 transitions. [2021-04-15 02:32:01,313 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 4121 transitions. Word has length 20 [2021-04-15 02:32:01,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:01,313 INFO L480 AbstractCegarLoop]: Abstraction has 1364 states and 4121 transitions. [2021-04-15 02:32:01,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:01,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 4121 transitions. [2021-04-15 02:32:01,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:01,314 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:01,314 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:01,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11659,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:01,515 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:01,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:01,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1871923696, now seen corresponding path program 254 times [2021-04-15 02:32:01,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:01,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077263764] [2021-04-15 02:32:01,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:01,615 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:01,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077263764] [2021-04-15 02:32:01,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109150308] [2021-04-15 02:32:01,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:01,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:32:01,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:01,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:01,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:01,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:01,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:02,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:02,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:02,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:02,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:02,554 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:02,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:02,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:32:02,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360339109] [2021-04-15 02:32:02,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:32:02,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:02,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:32:02,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:32:02,555 INFO L87 Difference]: Start difference. First operand 1364 states and 4121 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:03,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:03,031 INFO L93 Difference]: Finished difference Result 1463 states and 4289 transitions. [2021-04-15 02:32:03,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:32:03,031 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:03,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:03,033 INFO L225 Difference]: With dead ends: 1463 [2021-04-15 02:32:03,033 INFO L226 Difference]: Without dead ends: 1440 [2021-04-15 02:32:03,034 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 435.8ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:32:03,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-04-15 02:32:03,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1366. [2021-04-15 02:32:03,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 3.0065934065934066) internal successors, (4104), 1365 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:03,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 4104 transitions. [2021-04-15 02:32:03,048 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 4104 transitions. Word has length 20 [2021-04-15 02:32:03,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:03,048 INFO L480 AbstractCegarLoop]: Abstraction has 1366 states and 4104 transitions. [2021-04-15 02:32:03,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:03,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 4104 transitions. [2021-04-15 02:32:03,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:03,049 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:03,049 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:03,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11809 [2021-04-15 02:32:03,253 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:03,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:03,253 INFO L82 PathProgramCache]: Analyzing trace with hash 980602065, now seen corresponding path program 255 times [2021-04-15 02:32:03,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:03,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824792472] [2021-04-15 02:32:03,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:03,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824792472] [2021-04-15 02:32:03,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928019185] [2021-04-15 02:32:03,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:03,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:32:03,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:03,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:32:03,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:03,353 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:03,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:03,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:32:03,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695355122] [2021-04-15 02:32:03,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:32:03,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:03,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:32:03,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:32:03,354 INFO L87 Difference]: Start difference. First operand 1366 states and 4104 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:03,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:03,439 INFO L93 Difference]: Finished difference Result 1698 states and 4827 transitions. [2021-04-15 02:32:03,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:32:03,439 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:03,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:03,441 INFO L225 Difference]: With dead ends: 1698 [2021-04-15 02:32:03,441 INFO L226 Difference]: Without dead ends: 1698 [2021-04-15 02:32:03,441 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:32:03,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-04-15 02:32:03,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1390. [2021-04-15 02:32:03,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.0057595392368612) internal successors, (4175), 1389 states have internal predecessors, (4175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:03,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4175 transitions. [2021-04-15 02:32:03,457 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4175 transitions. Word has length 20 [2021-04-15 02:32:03,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:03,457 INFO L480 AbstractCegarLoop]: Abstraction has 1390 states and 4175 transitions. [2021-04-15 02:32:03,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:03,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4175 transitions. [2021-04-15 02:32:03,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:03,458 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:03,458 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:03,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12111,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:03,659 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:03,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:03,659 INFO L82 PathProgramCache]: Analyzing trace with hash 798838316, now seen corresponding path program 256 times [2021-04-15 02:32:03,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:03,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436871925] [2021-04-15 02:32:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:03,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436871925] [2021-04-15 02:32:03,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42258244] [2021-04-15 02:32:03,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:03,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:32:03,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:03,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:03,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:04,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:04,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:04,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:04,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:04,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:04,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:04,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:04,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:32:04,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945462475] [2021-04-15 02:32:04,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:32:04,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:04,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:32:04,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:32:04,396 INFO L87 Difference]: Start difference. First operand 1390 states and 4175 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:04,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:04,809 INFO L93 Difference]: Finished difference Result 1514 states and 4411 transitions. [2021-04-15 02:32:04,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:32:04,809 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:04,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:04,811 INFO L225 Difference]: With dead ends: 1514 [2021-04-15 02:32:04,811 INFO L226 Difference]: Without dead ends: 1509 [2021-04-15 02:32:04,811 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 366.8ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:32:04,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-04-15 02:32:04,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1390. [2021-04-15 02:32:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.0057595392368612) internal successors, (4175), 1389 states have internal predecessors, (4175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:04,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4175 transitions. [2021-04-15 02:32:04,824 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4175 transitions. Word has length 20 [2021-04-15 02:32:04,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:04,825 INFO L480 AbstractCegarLoop]: Abstraction has 1390 states and 4175 transitions. [2021-04-15 02:32:04,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:04,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4175 transitions. [2021-04-15 02:32:04,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:04,826 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:04,826 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:05,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12112 [2021-04-15 02:32:05,026 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:05,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:05,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1892929904, now seen corresponding path program 257 times [2021-04-15 02:32:05,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:05,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711964488] [2021-04-15 02:32:05,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:05,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:05,135 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:05,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711964488] [2021-04-15 02:32:05,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609721326] [2021-04-15 02:32:05,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:05,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:32:05,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:05,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:05,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:05,493 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:05,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:05,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:05,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:05,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:05,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:05,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:05,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:32:05,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324135331] [2021-04-15 02:32:05,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:32:05,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:05,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:32:05,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:32:05,877 INFO L87 Difference]: Start difference. First operand 1390 states and 4175 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:06,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:06,364 INFO L93 Difference]: Finished difference Result 1554 states and 4501 transitions. [2021-04-15 02:32:06,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:32:06,365 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:06,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:06,366 INFO L225 Difference]: With dead ends: 1554 [2021-04-15 02:32:06,366 INFO L226 Difference]: Without dead ends: 1539 [2021-04-15 02:32:06,367 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 418.3ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:32:06,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-04-15 02:32:06,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1390. [2021-04-15 02:32:06,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.0043196544276456) internal successors, (4173), 1389 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:06,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4173 transitions. [2021-04-15 02:32:06,380 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4173 transitions. Word has length 20 [2021-04-15 02:32:06,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:06,380 INFO L480 AbstractCegarLoop]: Abstraction has 1390 states and 4173 transitions. [2021-04-15 02:32:06,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:06,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4173 transitions. [2021-04-15 02:32:06,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:06,381 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:06,381 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:06,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12270,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:06,582 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:06,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:06,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1012111377, now seen corresponding path program 258 times [2021-04-15 02:32:06,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:06,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310747768] [2021-04-15 02:32:06,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:06,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:06,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310747768] [2021-04-15 02:32:06,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627696634] [2021-04-15 02:32:06,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:06,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:32:06,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:06,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:32:06,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:06,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:06,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:32:06,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270117504] [2021-04-15 02:32:06,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:32:06,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:06,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:32:06,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:32:06,701 INFO L87 Difference]: Start difference. First operand 1390 states and 4173 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:06,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:06,840 INFO L93 Difference]: Finished difference Result 2615 states and 7716 transitions. [2021-04-15 02:32:06,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:32:06,841 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:06,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:06,844 INFO L225 Difference]: With dead ends: 2615 [2021-04-15 02:32:06,844 INFO L226 Difference]: Without dead ends: 2615 [2021-04-15 02:32:06,844 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:32:06,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2615 states. [2021-04-15 02:32:06,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2615 to 2343. [2021-04-15 02:32:06,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 3.0572160546541416) internal successors, (7160), 2342 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:06,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 7160 transitions. [2021-04-15 02:32:06,871 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 7160 transitions. Word has length 20 [2021-04-15 02:32:06,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:06,871 INFO L480 AbstractCegarLoop]: Abstraction has 2343 states and 7160 transitions. [2021-04-15 02:32:06,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:06,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 7160 transitions. [2021-04-15 02:32:06,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:06,873 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:06,873 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:07,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12443 [2021-04-15 02:32:07,085 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:07,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:07,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1450030764, now seen corresponding path program 259 times [2021-04-15 02:32:07,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:07,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489133857] [2021-04-15 02:32:07,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:07,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489133857] [2021-04-15 02:32:07,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474246096] [2021-04-15 02:32:07,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:07,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:07,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:07,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:07,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:07,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:07,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:07,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:07,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:07,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:07,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:32:07,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140966780] [2021-04-15 02:32:07,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:32:07,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:07,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:32:07,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:32:07,979 INFO L87 Difference]: Start difference. First operand 2343 states and 7160 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:08,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:08,599 INFO L93 Difference]: Finished difference Result 2710 states and 8145 transitions. [2021-04-15 02:32:08,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:32:08,599 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:08,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:08,602 INFO L225 Difference]: With dead ends: 2710 [2021-04-15 02:32:08,602 INFO L226 Difference]: Without dead ends: 2705 [2021-04-15 02:32:08,603 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 491.9ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:32:08,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2021-04-15 02:32:08,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 2343. [2021-04-15 02:32:08,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 3.0572160546541416) internal successors, (7160), 2342 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:08,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 7160 transitions. [2021-04-15 02:32:08,628 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 7160 transitions. Word has length 20 [2021-04-15 02:32:08,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:08,628 INFO L480 AbstractCegarLoop]: Abstraction has 2343 states and 7160 transitions. [2021-04-15 02:32:08,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:08,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 7160 transitions. [2021-04-15 02:32:08,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:08,630 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:08,630 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:08,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12444 [2021-04-15 02:32:08,845 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:08,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:08,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1799720981, now seen corresponding path program 260 times [2021-04-15 02:32:08,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:08,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970674703] [2021-04-15 02:32:08,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:08,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970674703] [2021-04-15 02:32:08,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147121148] [2021-04-15 02:32:08,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:08,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:32:08,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:08,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:32:08,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:08,979 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:08,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:08,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:32:08,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14289427] [2021-04-15 02:32:08,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:32:08,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:08,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:32:08,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:32:08,993 INFO L87 Difference]: Start difference. First operand 2343 states and 7160 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:09,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:09,214 INFO L93 Difference]: Finished difference Result 3338 states and 9885 transitions. [2021-04-15 02:32:09,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:32:09,215 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:09,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:09,219 INFO L225 Difference]: With dead ends: 3338 [2021-04-15 02:32:09,219 INFO L226 Difference]: Without dead ends: 3338 [2021-04-15 02:32:09,219 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:32:09,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2021-04-15 02:32:09,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2994. [2021-04-15 02:32:09,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2994 states, 2993 states have (on average 3.05913798864016) internal successors, (9156), 2993 states have internal predecessors, (9156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:09,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 9156 transitions. [2021-04-15 02:32:09,262 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 9156 transitions. Word has length 20 [2021-04-15 02:32:09,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:09,262 INFO L480 AbstractCegarLoop]: Abstraction has 2994 states and 9156 transitions. [2021-04-15 02:32:09,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:09,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 9156 transitions. [2021-04-15 02:32:09,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:09,264 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:09,264 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:09,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12631 [2021-04-15 02:32:09,478 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:09,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:09,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1377490808, now seen corresponding path program 261 times [2021-04-15 02:32:09,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:09,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605595821] [2021-04-15 02:32:09,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:09,599 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:09,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605595821] [2021-04-15 02:32:09,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149335518] [2021-04-15 02:32:09,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:09,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:32:09,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:09,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:09,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:09,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:09,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:10,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:10,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:10,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:10,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:10,154 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:10,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:10,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:32:10,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386675688] [2021-04-15 02:32:10,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:32:10,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:10,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:32:10,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:32:10,155 INFO L87 Difference]: Start difference. First operand 2994 states and 9156 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:10,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:10,691 INFO L93 Difference]: Finished difference Result 3056 states and 9275 transitions. [2021-04-15 02:32:10,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:32:10,691 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:10,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:10,695 INFO L225 Difference]: With dead ends: 3056 [2021-04-15 02:32:10,695 INFO L226 Difference]: Without dead ends: 3044 [2021-04-15 02:32:10,695 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 483.0ms TimeCoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:32:10,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2021-04-15 02:32:10,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 2990. [2021-04-15 02:32:10,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2990 states, 2989 states have (on average 3.0595516895282704) internal successors, (9145), 2989 states have internal predecessors, (9145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2990 states to 2990 states and 9145 transitions. [2021-04-15 02:32:10,729 INFO L78 Accepts]: Start accepts. Automaton has 2990 states and 9145 transitions. Word has length 20 [2021-04-15 02:32:10,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:10,729 INFO L480 AbstractCegarLoop]: Abstraction has 2990 states and 9145 transitions. [2021-04-15 02:32:10,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:10,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2990 states and 9145 transitions. [2021-04-15 02:32:10,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:10,731 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:10,731 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:10,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12632 [2021-04-15 02:32:10,946 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:10,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:10,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1065396758, now seen corresponding path program 262 times [2021-04-15 02:32:10,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:10,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071943979] [2021-04-15 02:32:10,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:10,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:11,050 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:11,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071943979] [2021-04-15 02:32:11,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044048803] [2021-04-15 02:32:11,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:11,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:32:11,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:11,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:11,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:11,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:11,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:11,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:11,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:11,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:11,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:11,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:11,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:32:11,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753528715] [2021-04-15 02:32:11,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:32:11,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:11,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:32:11,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:32:11,635 INFO L87 Difference]: Start difference. First operand 2990 states and 9145 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:12,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:12,093 INFO L93 Difference]: Finished difference Result 3075 states and 9279 transitions. [2021-04-15 02:32:12,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:32:12,094 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:12,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:12,097 INFO L225 Difference]: With dead ends: 3075 [2021-04-15 02:32:12,097 INFO L226 Difference]: Without dead ends: 3062 [2021-04-15 02:32:12,097 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 415.4ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:32:12,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2021-04-15 02:32:12,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 2992. [2021-04-15 02:32:12,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2992 states, 2991 states have (on average 3.051822133065864) internal successors, (9128), 2991 states have internal predecessors, (9128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:12,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2992 states to 2992 states and 9128 transitions. [2021-04-15 02:32:12,131 INFO L78 Accepts]: Start accepts. Automaton has 2992 states and 9128 transitions. Word has length 20 [2021-04-15 02:32:12,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:12,131 INFO L480 AbstractCegarLoop]: Abstraction has 2992 states and 9128 transitions. [2021-04-15 02:32:12,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:12,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2992 states and 9128 transitions. [2021-04-15 02:32:12,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:12,134 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:12,134 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:12,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12720 [2021-04-15 02:32:12,341 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:12,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:12,341 INFO L82 PathProgramCache]: Analyzing trace with hash -2135478950, now seen corresponding path program 263 times [2021-04-15 02:32:12,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:12,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237501033] [2021-04-15 02:32:12,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:12,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237501033] [2021-04-15 02:32:12,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738394414] [2021-04-15 02:32:12,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:12,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:32:12,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:12,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:12,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:12,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:12,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:13,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:13,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:13,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:13,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:13,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:13,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:32:13,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371465498] [2021-04-15 02:32:13,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:32:13,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:13,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:32:13,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:32:13,231 INFO L87 Difference]: Start difference. First operand 2992 states and 9128 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:13,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:13,661 INFO L93 Difference]: Finished difference Result 3101 states and 9293 transitions. [2021-04-15 02:32:13,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:32:13,662 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:13,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:13,666 INFO L225 Difference]: With dead ends: 3101 [2021-04-15 02:32:13,666 INFO L226 Difference]: Without dead ends: 3076 [2021-04-15 02:32:13,666 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 504.1ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:32:13,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-04-15 02:32:13,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2982. [2021-04-15 02:32:13,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0385776585038577) internal successors, (9058), 2981 states have internal predecessors, (9058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:13,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9058 transitions. [2021-04-15 02:32:13,697 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9058 transitions. Word has length 20 [2021-04-15 02:32:13,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:13,697 INFO L480 AbstractCegarLoop]: Abstraction has 2982 states and 9058 transitions. [2021-04-15 02:32:13,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:13,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9058 transitions. [2021-04-15 02:32:13,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:13,700 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:13,700 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:13,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12832 [2021-04-15 02:32:13,900 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:13,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:13,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1716589206, now seen corresponding path program 264 times [2021-04-15 02:32:13,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:13,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941250192] [2021-04-15 02:32:13,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:13,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:14,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941250192] [2021-04-15 02:32:14,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896470668] [2021-04-15 02:32:14,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:14,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:32:14,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:14,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:14,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:14,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:14,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:14,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:14,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:14,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:14,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:14,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:14,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:32:14,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500533885] [2021-04-15 02:32:14,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:32:14,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:14,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:32:14,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:32:14,661 INFO L87 Difference]: Start difference. First operand 2982 states and 9058 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:15,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:15,218 INFO L93 Difference]: Finished difference Result 3164 states and 9474 transitions. [2021-04-15 02:32:15,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:32:15,219 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:15,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:15,222 INFO L225 Difference]: With dead ends: 3164 [2021-04-15 02:32:15,222 INFO L226 Difference]: Without dead ends: 3159 [2021-04-15 02:32:15,223 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 457.1ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:32:15,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2021-04-15 02:32:15,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 2982. [2021-04-15 02:32:15,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0385776585038577) internal successors, (9058), 2981 states have internal predecessors, (9058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:15,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9058 transitions. [2021-04-15 02:32:15,255 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9058 transitions. Word has length 20 [2021-04-15 02:32:15,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:15,255 INFO L480 AbstractCegarLoop]: Abstraction has 2982 states and 9058 transitions. [2021-04-15 02:32:15,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:15,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9058 transitions. [2021-04-15 02:32:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:15,257 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:15,257 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:15,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12950 [2021-04-15 02:32:15,457 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:15,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:15,458 INFO L82 PathProgramCache]: Analyzing trace with hash -72987268, now seen corresponding path program 265 times [2021-04-15 02:32:15,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:15,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059812459] [2021-04-15 02:32:15,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:15,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:15,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059812459] [2021-04-15 02:32:15,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719749791] [2021-04-15 02:32:15,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:15,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:15,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:15,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:15,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:15,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:16,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:16,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:16,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:16,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:16,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:16,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:32:16,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405863763] [2021-04-15 02:32:16,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:32:16,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:16,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:32:16,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:32:16,171 INFO L87 Difference]: Start difference. First operand 2982 states and 9058 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:16,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:16,646 INFO L93 Difference]: Finished difference Result 3032 states and 9158 transitions. [2021-04-15 02:32:16,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:32:16,646 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:16,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:16,650 INFO L225 Difference]: With dead ends: 3032 [2021-04-15 02:32:16,650 INFO L226 Difference]: Without dead ends: 3022 [2021-04-15 02:32:16,650 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 358.4ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:32:16,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2021-04-15 02:32:16,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2982. [2021-04-15 02:32:16,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0385776585038577) internal successors, (9058), 2981 states have internal predecessors, (9058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:16,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9058 transitions. [2021-04-15 02:32:16,680 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9058 transitions. Word has length 20 [2021-04-15 02:32:16,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:16,680 INFO L480 AbstractCegarLoop]: Abstraction has 2982 states and 9058 transitions. [2021-04-15 02:32:16,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:16,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9058 transitions. [2021-04-15 02:32:16,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:16,683 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:16,683 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:16,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13078,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:16,883 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:16,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:16,883 INFO L82 PathProgramCache]: Analyzing trace with hash -834014084, now seen corresponding path program 266 times [2021-04-15 02:32:16,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:16,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322687659] [2021-04-15 02:32:16,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:16,999 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:16,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322687659] [2021-04-15 02:32:16,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113132263] [2021-04-15 02:32:16,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:17,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:32:17,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:17,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:17,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:17,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:17,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:17,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:17,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:17,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:17,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:17,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:17,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:32:17,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052313313] [2021-04-15 02:32:17,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:32:17,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:17,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:32:17,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:32:17,698 INFO L87 Difference]: Start difference. First operand 2982 states and 9058 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:18,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:18,283 INFO L93 Difference]: Finished difference Result 3204 states and 9569 transitions. [2021-04-15 02:32:18,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:32:18,284 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:18,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:18,287 INFO L225 Difference]: With dead ends: 3204 [2021-04-15 02:32:18,287 INFO L226 Difference]: Without dead ends: 3187 [2021-04-15 02:32:18,288 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 461.3ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:32:18,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-04-15 02:32:18,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 2982. [2021-04-15 02:32:18,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0332103321033212) internal successors, (9042), 2981 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:18,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9042 transitions. [2021-04-15 02:32:18,320 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9042 transitions. Word has length 20 [2021-04-15 02:32:18,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:18,320 INFO L480 AbstractCegarLoop]: Abstraction has 2982 states and 9042 transitions. [2021-04-15 02:32:18,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:18,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9042 transitions. [2021-04-15 02:32:18,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:18,322 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:18,322 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:18,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13210,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:18,523 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:18,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:18,523 INFO L82 PathProgramCache]: Analyzing trace with hash -812513544, now seen corresponding path program 267 times [2021-04-15 02:32:18,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:18,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167628233] [2021-04-15 02:32:18,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:18,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:18,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167628233] [2021-04-15 02:32:18,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905085379] [2021-04-15 02:32:18,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:18,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:32:18,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:18,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:18,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:18,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:18,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:19,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:19,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:19,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:19,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:19,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:19,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:32:19,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444685544] [2021-04-15 02:32:19,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:32:19,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:19,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:32:19,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:32:19,140 INFO L87 Difference]: Start difference. First operand 2982 states and 9042 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:19,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:19,496 INFO L93 Difference]: Finished difference Result 3020 states and 9115 transitions. [2021-04-15 02:32:19,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:32:19,497 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:19,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:19,500 INFO L225 Difference]: With dead ends: 3020 [2021-04-15 02:32:19,500 INFO L226 Difference]: Without dead ends: 3015 [2021-04-15 02:32:19,500 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 331.8ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:32:19,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3015 states. [2021-04-15 02:32:19,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3015 to 2982. [2021-04-15 02:32:19,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0332103321033212) internal successors, (9042), 2981 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:19,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9042 transitions. [2021-04-15 02:32:19,534 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9042 transitions. Word has length 20 [2021-04-15 02:32:19,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:19,534 INFO L480 AbstractCegarLoop]: Abstraction has 2982 states and 9042 transitions. [2021-04-15 02:32:19,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:19,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9042 transitions. [2021-04-15 02:32:19,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:19,537 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:19,537 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:19,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13353,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:19,737 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:19,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:19,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1756974294, now seen corresponding path program 268 times [2021-04-15 02:32:19,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:19,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19500973] [2021-04-15 02:32:19,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:19,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19500973] [2021-04-15 02:32:19,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616290402] [2021-04-15 02:32:19,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:19,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:32:19,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:19,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:19,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:20,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:20,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:20,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:20,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:20,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:20,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:20,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:20,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:32:20,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347943859] [2021-04-15 02:32:20,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:32:20,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:20,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:32:20,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:32:20,664 INFO L87 Difference]: Start difference. First operand 2982 states and 9042 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:21,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:21,250 INFO L93 Difference]: Finished difference Result 3037 states and 9140 transitions. [2021-04-15 02:32:21,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:32:21,251 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:21,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:21,254 INFO L225 Difference]: With dead ends: 3037 [2021-04-15 02:32:21,254 INFO L226 Difference]: Without dead ends: 3032 [2021-04-15 02:32:21,255 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 370.9ms TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:32:21,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-04-15 02:32:21,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2982. [2021-04-15 02:32:21,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0332103321033212) internal successors, (9042), 2981 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:21,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9042 transitions. [2021-04-15 02:32:21,287 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9042 transitions. Word has length 20 [2021-04-15 02:32:21,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:21,287 INFO L480 AbstractCegarLoop]: Abstraction has 2982 states and 9042 transitions. [2021-04-15 02:32:21,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:21,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9042 transitions. [2021-04-15 02:32:21,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:21,289 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:21,289 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:21,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13442,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:21,490 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:21,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:21,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1048588006, now seen corresponding path program 269 times [2021-04-15 02:32:21,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:21,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615586392] [2021-04-15 02:32:21,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:21,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:21,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615586392] [2021-04-15 02:32:21,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679586342] [2021-04-15 02:32:21,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:21,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:32:21,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:21,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:21,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:21,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:21,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:22,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:22,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:22,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:22,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:22,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:22,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:32:22,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386119209] [2021-04-15 02:32:22,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:32:22,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:22,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:32:22,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:32:22,091 INFO L87 Difference]: Start difference. First operand 2982 states and 9042 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:22,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:22,521 INFO L93 Difference]: Finished difference Result 3082 states and 9238 transitions. [2021-04-15 02:32:22,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:32:22,522 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:22,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:22,525 INFO L225 Difference]: With dead ends: 3082 [2021-04-15 02:32:22,525 INFO L226 Difference]: Without dead ends: 3077 [2021-04-15 02:32:22,525 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 357.2ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:32:22,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3077 states. [2021-04-15 02:32:22,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3077 to 2982. [2021-04-15 02:32:22,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0332103321033212) internal successors, (9042), 2981 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:22,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9042 transitions. [2021-04-15 02:32:22,557 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9042 transitions. Word has length 20 [2021-04-15 02:32:22,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:22,557 INFO L480 AbstractCegarLoop]: Abstraction has 2982 states and 9042 transitions. [2021-04-15 02:32:22,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:22,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9042 transitions. [2021-04-15 02:32:22,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:22,560 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:22,560 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:22,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13698 [2021-04-15 02:32:22,760 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:22,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:22,760 INFO L82 PathProgramCache]: Analyzing trace with hash -2121673386, now seen corresponding path program 270 times [2021-04-15 02:32:22,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:22,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123947417] [2021-04-15 02:32:22,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:22,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123947417] [2021-04-15 02:32:22,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620224007] [2021-04-15 02:32:22,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:22,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:32:22,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:22,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:22,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:23,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:23,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:23,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:23,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:23,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:23,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:23,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:23,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:32:23,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208514619] [2021-04-15 02:32:23,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:32:23,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:23,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:32:23,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:32:23,384 INFO L87 Difference]: Start difference. First operand 2982 states and 9042 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:23,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:23,917 INFO L93 Difference]: Finished difference Result 3139 states and 9381 transitions. [2021-04-15 02:32:23,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:32:23,918 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:23,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:23,922 INFO L225 Difference]: With dead ends: 3139 [2021-04-15 02:32:23,922 INFO L226 Difference]: Without dead ends: 3126 [2021-04-15 02:32:23,922 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 428.2ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:32:23,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-04-15 02:32:23,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2986. [2021-04-15 02:32:23,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 3.0268006700167502) internal successors, (9035), 2985 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:23,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 9035 transitions. [2021-04-15 02:32:23,954 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 9035 transitions. Word has length 20 [2021-04-15 02:32:23,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:23,954 INFO L480 AbstractCegarLoop]: Abstraction has 2986 states and 9035 transitions. [2021-04-15 02:32:23,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:23,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 9035 transitions. [2021-04-15 02:32:23,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:23,957 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:23,957 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:24,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13791,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:24,157 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:24,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:24,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1402054059, now seen corresponding path program 271 times [2021-04-15 02:32:24,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:24,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830698121] [2021-04-15 02:32:24,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:24,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830698121] [2021-04-15 02:32:24,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693338477] [2021-04-15 02:32:24,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:24,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:32:24,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:24,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:24,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:32:24,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927565396] [2021-04-15 02:32:24,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:32:24,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:24,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:32:24,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:32:24,269 INFO L87 Difference]: Start difference. First operand 2986 states and 9035 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:24,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:24,387 INFO L93 Difference]: Finished difference Result 3429 states and 10006 transitions. [2021-04-15 02:32:24,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:32:24,388 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:24,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:24,392 INFO L225 Difference]: With dead ends: 3429 [2021-04-15 02:32:24,392 INFO L226 Difference]: Without dead ends: 3429 [2021-04-15 02:32:24,392 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:32:24,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2021-04-15 02:32:24,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 2845. [2021-04-15 02:32:24,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2844 states have (on average 2.9947257383966246) internal successors, (8517), 2844 states have internal predecessors, (8517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:24,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 8517 transitions. [2021-04-15 02:32:24,430 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 8517 transitions. Word has length 20 [2021-04-15 02:32:24,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:24,430 INFO L480 AbstractCegarLoop]: Abstraction has 2845 states and 8517 transitions. [2021-04-15 02:32:24,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:24,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 8517 transitions. [2021-04-15 02:32:24,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:24,432 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:24,432 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:24,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13867 [2021-04-15 02:32:24,633 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:24,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:24,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1027581798, now seen corresponding path program 272 times [2021-04-15 02:32:24,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:24,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752902499] [2021-04-15 02:32:24,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:24,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752902499] [2021-04-15 02:32:24,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532820813] [2021-04-15 02:32:24,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:24,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:32:24,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:24,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:24,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:25,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:25,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:25,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:25,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:25,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:25,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:25,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:25,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:32:25,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432514857] [2021-04-15 02:32:25,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:32:25,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:25,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:32:25,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:32:25,475 INFO L87 Difference]: Start difference. First operand 2845 states and 8517 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:25,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:25,947 INFO L93 Difference]: Finished difference Result 3008 states and 8868 transitions. [2021-04-15 02:32:25,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:32:25,947 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:25,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:25,951 INFO L225 Difference]: With dead ends: 3008 [2021-04-15 02:32:25,951 INFO L226 Difference]: Without dead ends: 3003 [2021-04-15 02:32:25,951 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 405.1ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:32:25,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2021-04-15 02:32:25,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 2845. [2021-04-15 02:32:25,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2844 states have (on average 2.9947257383966246) internal successors, (8517), 2844 states have internal predecessors, (8517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:25,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 8517 transitions. [2021-04-15 02:32:25,983 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 8517 transitions. Word has length 20 [2021-04-15 02:32:25,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:25,983 INFO L480 AbstractCegarLoop]: Abstraction has 2845 states and 8517 transitions. [2021-04-15 02:32:25,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:25,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 8517 transitions. [2021-04-15 02:32:25,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:25,985 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:25,985 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:26,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13868 [2021-04-15 02:32:26,186 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:26,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:26,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1908400325, now seen corresponding path program 273 times [2021-04-15 02:32:26,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:26,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120415163] [2021-04-15 02:32:26,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:26,239 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:26,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120415163] [2021-04-15 02:32:26,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580393538] [2021-04-15 02:32:26,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:26,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:32:26,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:26,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:32:26,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:26,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:26,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:32:26,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261754217] [2021-04-15 02:32:26,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:32:26,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:26,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:32:26,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:32:26,306 INFO L87 Difference]: Start difference. First operand 2845 states and 8517 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:26,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:26,397 INFO L93 Difference]: Finished difference Result 3840 states and 11378 transitions. [2021-04-15 02:32:26,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:32:26,398 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:26,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:26,402 INFO L225 Difference]: With dead ends: 3840 [2021-04-15 02:32:26,402 INFO L226 Difference]: Without dead ends: 3840 [2021-04-15 02:32:26,402 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:26,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3840 states. [2021-04-15 02:32:26,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3840 to 3571. [2021-04-15 02:32:26,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 3.0103641456582633) internal successors, (10747), 3570 states have internal predecessors, (10747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:26,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 10747 transitions. [2021-04-15 02:32:26,441 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 10747 transitions. Word has length 20 [2021-04-15 02:32:26,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:26,441 INFO L480 AbstractCegarLoop]: Abstraction has 3571 states and 10747 transitions. [2021-04-15 02:32:26,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:26,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 10747 transitions. [2021-04-15 02:32:26,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:26,443 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:26,444 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:26,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13992,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:26,644 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:26,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:26,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1470480938, now seen corresponding path program 274 times [2021-04-15 02:32:26,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:26,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542891466] [2021-04-15 02:32:26,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:26,758 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:26,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542891466] [2021-04-15 02:32:26,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278522189] [2021-04-15 02:32:26,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:26,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:32:26,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:26,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:26,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:27,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:27,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:27,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:27,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:27,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:27,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:27,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:27,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:32:27,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193517644] [2021-04-15 02:32:27,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:32:27,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:27,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:32:27,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:32:27,486 INFO L87 Difference]: Start difference. First operand 3571 states and 10747 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:28,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:28,010 INFO L93 Difference]: Finished difference Result 3789 states and 11234 transitions. [2021-04-15 02:32:28,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:32:28,010 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:28,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:28,014 INFO L225 Difference]: With dead ends: 3789 [2021-04-15 02:32:28,014 INFO L226 Difference]: Without dead ends: 3772 [2021-04-15 02:32:28,015 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 478.9ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:32:28,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3772 states. [2021-04-15 02:32:28,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3772 to 3571. [2021-04-15 02:32:28,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 3.0095238095238095) internal successors, (10744), 3570 states have internal predecessors, (10744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:28,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 10744 transitions. [2021-04-15 02:32:28,055 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 10744 transitions. Word has length 20 [2021-04-15 02:32:28,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:28,055 INFO L480 AbstractCegarLoop]: Abstraction has 3571 states and 10744 transitions. [2021-04-15 02:32:28,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:28,055 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 10744 transitions. [2021-04-15 02:32:28,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:28,057 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:28,057 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:28,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13993,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:28,258 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:28,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:28,258 INFO L82 PathProgramCache]: Analyzing trace with hash -425265387, now seen corresponding path program 275 times [2021-04-15 02:32:28,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:28,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686492868] [2021-04-15 02:32:28,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:28,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686492868] [2021-04-15 02:32:28,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916634330] [2021-04-15 02:32:28,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:28,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:32:28,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:28,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:32:28,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:28,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:28,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:32:28,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590748485] [2021-04-15 02:32:28,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:32:28,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:28,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:32:28,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:32:28,377 INFO L87 Difference]: Start difference. First operand 3571 states and 10744 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:28,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:28,545 INFO L93 Difference]: Finished difference Result 3935 states and 11615 transitions. [2021-04-15 02:32:28,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:32:28,546 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:28,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:28,550 INFO L225 Difference]: With dead ends: 3935 [2021-04-15 02:32:28,551 INFO L226 Difference]: Without dead ends: 3935 [2021-04-15 02:32:28,551 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 126.7ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:32:28,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3935 states. [2021-04-15 02:32:28,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3935 to 3315. [2021-04-15 02:32:28,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 3.007845503922752) internal successors, (9968), 3314 states have internal predecessors, (9968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:28,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 9968 transitions. [2021-04-15 02:32:28,606 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 9968 transitions. Word has length 20 [2021-04-15 02:32:28,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:28,606 INFO L480 AbstractCegarLoop]: Abstraction has 3315 states and 9968 transitions. [2021-04-15 02:32:28,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:28,606 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 9968 transitions. [2021-04-15 02:32:28,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:28,608 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:28,608 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:28,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14169 [2021-04-15 02:32:28,809 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:28,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:28,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1979514906, now seen corresponding path program 276 times [2021-04-15 02:32:28,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:28,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565622472] [2021-04-15 02:32:28,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:28,927 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:28,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565622472] [2021-04-15 02:32:28,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417504344] [2021-04-15 02:32:28,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:28,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:32:28,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:28,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:28,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:29,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:29,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:29,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:29,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:29,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:29,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:29,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:29,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:32:29,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851394292] [2021-04-15 02:32:29,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:32:29,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:29,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:32:29,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:32:29,445 INFO L87 Difference]: Start difference. First operand 3315 states and 9968 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:29,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:29,946 INFO L93 Difference]: Finished difference Result 3697 states and 10990 transitions. [2021-04-15 02:32:29,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:32:29,946 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:29,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:29,950 INFO L225 Difference]: With dead ends: 3697 [2021-04-15 02:32:29,950 INFO L226 Difference]: Without dead ends: 3692 [2021-04-15 02:32:29,950 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 508.7ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:32:29,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3692 states. [2021-04-15 02:32:29,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3692 to 3315. [2021-04-15 02:32:29,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 3.007845503922752) internal successors, (9968), 3314 states have internal predecessors, (9968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:29,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 9968 transitions. [2021-04-15 02:32:29,988 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 9968 transitions. Word has length 20 [2021-04-15 02:32:29,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:29,988 INFO L480 AbstractCegarLoop]: Abstraction has 3315 states and 9968 transitions. [2021-04-15 02:32:29,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:29,988 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 9968 transitions. [2021-04-15 02:32:29,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:29,990 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:29,990 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:30,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14170 [2021-04-15 02:32:30,190 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:30,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:30,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1692722565, now seen corresponding path program 277 times [2021-04-15 02:32:30,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:30,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609794435] [2021-04-15 02:32:30,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:30,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609794435] [2021-04-15 02:32:30,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985362414] [2021-04-15 02:32:30,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:30,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:32:30,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:30,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:30,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:32:30,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636326826] [2021-04-15 02:32:30,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:32:30,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:30,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:32:30,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:32:30,339 INFO L87 Difference]: Start difference. First operand 3315 states and 9968 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:30,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:30,570 INFO L93 Difference]: Finished difference Result 3902 states and 11479 transitions. [2021-04-15 02:32:30,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:32:30,571 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:30,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:30,575 INFO L225 Difference]: With dead ends: 3902 [2021-04-15 02:32:30,575 INFO L226 Difference]: Without dead ends: 3902 [2021-04-15 02:32:30,575 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:32:30,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2021-04-15 02:32:30,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 3561. [2021-04-15 02:32:30,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 3.0095505617977527) internal successors, (10714), 3560 states have internal predecessors, (10714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:30,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 10714 transitions. [2021-04-15 02:32:30,616 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 10714 transitions. Word has length 20 [2021-04-15 02:32:30,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:30,616 INFO L480 AbstractCegarLoop]: Abstraction has 3561 states and 10714 transitions. [2021-04-15 02:32:30,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:30,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 10714 transitions. [2021-04-15 02:32:30,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:30,619 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:30,619 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:30,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14236 [2021-04-15 02:32:30,819 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:30,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:30,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1050867918, now seen corresponding path program 278 times [2021-04-15 02:32:30,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:30,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437442248] [2021-04-15 02:32:30,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:30,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437442248] [2021-04-15 02:32:30,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578681216] [2021-04-15 02:32:30,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:30,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:32:30,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:30,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:30,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:31,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:31,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:31,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:31,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:31,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:31,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:31,497 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:31,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:31,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:32:31,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931161888] [2021-04-15 02:32:31,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:32:31,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:31,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:32:31,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:32:31,498 INFO L87 Difference]: Start difference. First operand 3561 states and 10714 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:32,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:32,097 INFO L93 Difference]: Finished difference Result 3658 states and 10896 transitions. [2021-04-15 02:32:32,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:32:32,098 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:32,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:32,102 INFO L225 Difference]: With dead ends: 3658 [2021-04-15 02:32:32,102 INFO L226 Difference]: Without dead ends: 3642 [2021-04-15 02:32:32,102 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 480.2ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:32:32,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3642 states. [2021-04-15 02:32:32,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3642 to 3561. [2021-04-15 02:32:32,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 3.0070224719101124) internal successors, (10705), 3560 states have internal predecessors, (10705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:32,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 10705 transitions. [2021-04-15 02:32:32,141 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 10705 transitions. Word has length 20 [2021-04-15 02:32:32,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:32,141 INFO L480 AbstractCegarLoop]: Abstraction has 3561 states and 10705 transitions. [2021-04-15 02:32:32,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:32,141 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 10705 transitions. [2021-04-15 02:32:32,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:32,144 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:32,144 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:32,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14237 [2021-04-15 02:32:32,345 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:32,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:32,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1354204688, now seen corresponding path program 279 times [2021-04-15 02:32:32,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:32,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230104003] [2021-04-15 02:32:32,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:32,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230104003] [2021-04-15 02:32:32,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54871124] [2021-04-15 02:32:32,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:32,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:32:32,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:32,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:32,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:32,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:32,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:33,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:33,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:33,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:33,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:33,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:33,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:32:33,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755307125] [2021-04-15 02:32:33,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:32:33,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:33,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:32:33,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:32:33,216 INFO L87 Difference]: Start difference. First operand 3561 states and 10705 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:33,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:33,714 INFO L93 Difference]: Finished difference Result 3663 states and 10877 transitions. [2021-04-15 02:32:33,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:32:33,715 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:33,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:33,719 INFO L225 Difference]: With dead ends: 3663 [2021-04-15 02:32:33,719 INFO L226 Difference]: Without dead ends: 3648 [2021-04-15 02:32:33,719 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 402.6ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:32:33,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3648 states. [2021-04-15 02:32:33,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3648 to 3561. [2021-04-15 02:32:33,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 2.9985955056179776) internal successors, (10675), 3560 states have internal predecessors, (10675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:33,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 10675 transitions. [2021-04-15 02:32:33,758 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 10675 transitions. Word has length 20 [2021-04-15 02:32:33,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:33,758 INFO L480 AbstractCegarLoop]: Abstraction has 3561 states and 10675 transitions. [2021-04-15 02:32:33,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:33,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 10675 transitions. [2021-04-15 02:32:33,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:33,762 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:33,762 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:33,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14316,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:33,962 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:33,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:33,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1797103828, now seen corresponding path program 280 times [2021-04-15 02:32:33,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:33,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137407300] [2021-04-15 02:32:33,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:34,072 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:34,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137407300] [2021-04-15 02:32:34,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030568744] [2021-04-15 02:32:34,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:34,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:32:34,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:34,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:34,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:34,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:34,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:34,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:34,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:34,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:34,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:34,786 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:34,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:34,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:32:34,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275667580] [2021-04-15 02:32:34,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:32:34,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:34,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:32:34,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:32:34,787 INFO L87 Difference]: Start difference. First operand 3561 states and 10675 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:35,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:35,377 INFO L93 Difference]: Finished difference Result 3677 states and 10845 transitions. [2021-04-15 02:32:35,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:32:35,377 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:35,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:35,381 INFO L225 Difference]: With dead ends: 3677 [2021-04-15 02:32:35,381 INFO L226 Difference]: Without dead ends: 3660 [2021-04-15 02:32:35,382 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 461.5ms TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:32:35,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3660 states. [2021-04-15 02:32:35,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3660 to 3561. [2021-04-15 02:32:35,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 2.9856741573033707) internal successors, (10629), 3560 states have internal predecessors, (10629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:35,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 10629 transitions. [2021-04-15 02:32:35,422 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 10629 transitions. Word has length 20 [2021-04-15 02:32:35,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:35,422 INFO L480 AbstractCegarLoop]: Abstraction has 3561 states and 10629 transitions. [2021-04-15 02:32:35,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:35,422 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 10629 transitions. [2021-04-15 02:32:35,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:35,425 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:35,425 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:35,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14493 [2021-04-15 02:32:35,626 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:35,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:35,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1652892016, now seen corresponding path program 281 times [2021-04-15 02:32:35,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:35,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257933954] [2021-04-15 02:32:35,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:35,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:35,739 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:35,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257933954] [2021-04-15 02:32:35,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178784254] [2021-04-15 02:32:35,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:35,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:32:35,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:35,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:35,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:36,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:36,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:36,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:36,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:36,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:36,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:36,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:36,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:32:36,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339114888] [2021-04-15 02:32:36,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:32:36,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:36,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:32:36,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:32:36,608 INFO L87 Difference]: Start difference. First operand 3561 states and 10629 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:37,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:37,072 INFO L93 Difference]: Finished difference Result 3666 states and 10779 transitions. [2021-04-15 02:32:37,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:32:37,073 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:37,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:37,077 INFO L225 Difference]: With dead ends: 3666 [2021-04-15 02:32:37,077 INFO L226 Difference]: Without dead ends: 3661 [2021-04-15 02:32:37,077 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 514.5ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:32:37,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2021-04-15 02:32:37,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 3561. [2021-04-15 02:32:37,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 2.9856741573033707) internal successors, (10629), 3560 states have internal predecessors, (10629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:37,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 10629 transitions. [2021-04-15 02:32:37,116 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 10629 transitions. Word has length 20 [2021-04-15 02:32:37,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:37,116 INFO L480 AbstractCegarLoop]: Abstraction has 3561 states and 10629 transitions. [2021-04-15 02:32:37,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:37,116 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 10629 transitions. [2021-04-15 02:32:37,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:37,119 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:37,119 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:37,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14646 [2021-04-15 02:32:37,320 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:37,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:37,320 INFO L82 PathProgramCache]: Analyzing trace with hash 2136066476, now seen corresponding path program 282 times [2021-04-15 02:32:37,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:37,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100086160] [2021-04-15 02:32:37,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:37,426 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:37,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100086160] [2021-04-15 02:32:37,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901983361] [2021-04-15 02:32:37,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:37,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:32:37,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:37,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:37,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:37,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:37,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:37,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:37,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:37,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:37,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:37,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:37,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:32:37,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115379527] [2021-04-15 02:32:37,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:32:37,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:37,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:32:37,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:32:37,965 INFO L87 Difference]: Start difference. First operand 3561 states and 10629 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:38,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:38,412 INFO L93 Difference]: Finished difference Result 3633 states and 10776 transitions. [2021-04-15 02:32:38,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:32:38,413 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:38,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:38,417 INFO L225 Difference]: With dead ends: 3633 [2021-04-15 02:32:38,417 INFO L226 Difference]: Without dead ends: 3623 [2021-04-15 02:32:38,417 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 399.2ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:32:38,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states. [2021-04-15 02:32:38,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3623 to 3565. [2021-04-15 02:32:38,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3565 states, 3564 states have (on average 2.98625140291807) internal successors, (10643), 3564 states have internal predecessors, (10643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:38,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 10643 transitions. [2021-04-15 02:32:38,457 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 10643 transitions. Word has length 20 [2021-04-15 02:32:38,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:38,457 INFO L480 AbstractCegarLoop]: Abstraction has 3565 states and 10643 transitions. [2021-04-15 02:32:38,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:38,457 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 10643 transitions. [2021-04-15 02:32:38,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:38,460 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:38,460 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:38,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14873 [2021-04-15 02:32:38,661 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:38,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:38,661 INFO L82 PathProgramCache]: Analyzing trace with hash -106398646, now seen corresponding path program 283 times [2021-04-15 02:32:38,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:38,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918095742] [2021-04-15 02:32:38,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:38,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918095742] [2021-04-15 02:32:38,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180045665] [2021-04-15 02:32:38,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:38,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:38,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:39,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:39,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:39,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:39,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:39,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:39,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:39,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:39,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:32:39,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385805752] [2021-04-15 02:32:39,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:32:39,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:39,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:32:39,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:32:39,424 INFO L87 Difference]: Start difference. First operand 3565 states and 10643 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:39,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:39,919 INFO L93 Difference]: Finished difference Result 3684 states and 10816 transitions. [2021-04-15 02:32:39,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:32:39,919 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:39,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:39,923 INFO L225 Difference]: With dead ends: 3684 [2021-04-15 02:32:39,923 INFO L226 Difference]: Without dead ends: 3665 [2021-04-15 02:32:39,924 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 513.4ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:32:39,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3665 states. [2021-04-15 02:32:39,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3665 to 3565. [2021-04-15 02:32:39,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3565 states, 3564 states have (on average 2.9812008978675646) internal successors, (10625), 3564 states have internal predecessors, (10625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:39,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 10625 transitions. [2021-04-15 02:32:39,964 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 10625 transitions. Word has length 20 [2021-04-15 02:32:39,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:39,964 INFO L480 AbstractCegarLoop]: Abstraction has 3565 states and 10625 transitions. [2021-04-15 02:32:39,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:39,964 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 10625 transitions. [2021-04-15 02:32:39,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:39,967 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:39,967 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:40,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14953 [2021-04-15 02:32:40,168 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:40,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:40,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1154063090, now seen corresponding path program 284 times [2021-04-15 02:32:40,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:40,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359597310] [2021-04-15 02:32:40,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:40,260 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:40,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359597310] [2021-04-15 02:32:40,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448763398] [2021-04-15 02:32:40,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:40,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:32:40,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:40,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:40,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:40,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:40,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:40,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:40,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:40,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:40,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:40,959 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:40,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:40,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:32:40,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506436903] [2021-04-15 02:32:40,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:32:40,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:40,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:32:40,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:32:40,959 INFO L87 Difference]: Start difference. First operand 3565 states and 10625 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:41,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:41,309 INFO L93 Difference]: Finished difference Result 3609 states and 10719 transitions. [2021-04-15 02:32:41,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:32:41,310 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:41,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:41,313 INFO L225 Difference]: With dead ends: 3609 [2021-04-15 02:32:41,313 INFO L226 Difference]: Without dead ends: 3604 [2021-04-15 02:32:41,313 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 305.4ms TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:32:41,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3604 states. [2021-04-15 02:32:41,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3604 to 3565. [2021-04-15 02:32:41,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3565 states, 3564 states have (on average 2.9812008978675646) internal successors, (10625), 3564 states have internal predecessors, (10625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:41,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 10625 transitions. [2021-04-15 02:32:41,351 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 10625 transitions. Word has length 20 [2021-04-15 02:32:41,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:41,351 INFO L480 AbstractCegarLoop]: Abstraction has 3565 states and 10625 transitions. [2021-04-15 02:32:41,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:41,351 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 10625 transitions. [2021-04-15 02:32:41,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:41,354 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:41,354 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:41,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15083,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:41,554 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:41,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:41,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1415424748, now seen corresponding path program 285 times [2021-04-15 02:32:41,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:41,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117773144] [2021-04-15 02:32:41,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:41,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:41,640 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:41,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117773144] [2021-04-15 02:32:41,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477954249] [2021-04-15 02:32:41,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:41,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:32:41,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:41,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:41,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:41,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:41,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:42,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:42,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:42,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:42,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:42,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:42,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:32:42,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139632534] [2021-04-15 02:32:42,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:32:42,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:42,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:32:42,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:32:42,173 INFO L87 Difference]: Start difference. First operand 3565 states and 10625 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:42,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:42,609 INFO L93 Difference]: Finished difference Result 3624 states and 10731 transitions. [2021-04-15 02:32:42,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:32:42,609 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:42,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:42,614 INFO L225 Difference]: With dead ends: 3624 [2021-04-15 02:32:42,614 INFO L226 Difference]: Without dead ends: 3619 [2021-04-15 02:32:42,614 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 355.2ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:32:42,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2021-04-15 02:32:42,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 3565. [2021-04-15 02:32:42,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3565 states, 3564 states have (on average 2.9812008978675646) internal successors, (10625), 3564 states have internal predecessors, (10625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:42,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 10625 transitions. [2021-04-15 02:32:42,654 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 10625 transitions. Word has length 20 [2021-04-15 02:32:42,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:42,654 INFO L480 AbstractCegarLoop]: Abstraction has 3565 states and 10625 transitions. [2021-04-15 02:32:42,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:42,655 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 10625 transitions. [2021-04-15 02:32:42,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:42,657 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:42,658 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:42,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15250 [2021-04-15 02:32:42,858 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:42,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:42,858 INFO L82 PathProgramCache]: Analyzing trace with hash -220599381, now seen corresponding path program 286 times [2021-04-15 02:32:42,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:42,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707371341] [2021-04-15 02:32:42,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:42,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707371341] [2021-04-15 02:32:42,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250397045] [2021-04-15 02:32:42,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:42,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:32:42,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:42,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:32:42,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:42,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:42,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:32:42,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618150651] [2021-04-15 02:32:42,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:32:42,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:42,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:32:42,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:32:42,985 INFO L87 Difference]: Start difference. First operand 3565 states and 10625 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:43,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:43,113 INFO L93 Difference]: Finished difference Result 4289 states and 12569 transitions. [2021-04-15 02:32:43,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:32:43,114 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:43,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:43,118 INFO L225 Difference]: With dead ends: 4289 [2021-04-15 02:32:43,119 INFO L226 Difference]: Without dead ends: 4289 [2021-04-15 02:32:43,119 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:32:43,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4289 states. [2021-04-15 02:32:43,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4289 to 3974. [2021-04-15 02:32:43,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3974 states, 3973 states have (on average 2.9974830103196575) internal successors, (11909), 3973 states have internal predecessors, (11909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:43,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3974 states to 3974 states and 11909 transitions. [2021-04-15 02:32:43,167 INFO L78 Accepts]: Start accepts. Automaton has 3974 states and 11909 transitions. Word has length 20 [2021-04-15 02:32:43,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:43,167 INFO L480 AbstractCegarLoop]: Abstraction has 3974 states and 11909 transitions. [2021-04-15 02:32:43,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:43,167 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states and 11909 transitions. [2021-04-15 02:32:43,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:43,170 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:43,170 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:43,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15352,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:43,371 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:43,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:43,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1390137552, now seen corresponding path program 287 times [2021-04-15 02:32:43,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:43,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573477531] [2021-04-15 02:32:43,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:43,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:43,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573477531] [2021-04-15 02:32:43,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352361362] [2021-04-15 02:32:43,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:43,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:32:43,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:43,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:43,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:43,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:43,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:44,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:44,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:44,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:44,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:44,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:44,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:32:44,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240767021] [2021-04-15 02:32:44,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:32:44,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:44,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:32:44,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:32:44,372 INFO L87 Difference]: Start difference. First operand 3974 states and 11909 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:44,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:44,775 INFO L93 Difference]: Finished difference Result 4051 states and 12046 transitions. [2021-04-15 02:32:44,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:32:44,775 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:44,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:44,780 INFO L225 Difference]: With dead ends: 4051 [2021-04-15 02:32:44,780 INFO L226 Difference]: Without dead ends: 4046 [2021-04-15 02:32:44,780 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 413.7ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:32:44,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4046 states. [2021-04-15 02:32:44,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4046 to 3974. [2021-04-15 02:32:44,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3974 states, 3973 states have (on average 2.9974830103196575) internal successors, (11909), 3973 states have internal predecessors, (11909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:44,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3974 states to 3974 states and 11909 transitions. [2021-04-15 02:32:44,828 INFO L78 Accepts]: Start accepts. Automaton has 3974 states and 11909 transitions. Word has length 20 [2021-04-15 02:32:44,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:44,828 INFO L480 AbstractCegarLoop]: Abstraction has 3974 states and 11909 transitions. [2021-04-15 02:32:44,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:44,828 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states and 11909 transitions. [2021-04-15 02:32:44,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:44,832 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:44,832 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:45,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15353 [2021-04-15 02:32:45,032 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:45,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:45,032 INFO L82 PathProgramCache]: Analyzing trace with hash 2013508113, now seen corresponding path program 288 times [2021-04-15 02:32:45,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:45,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132216886] [2021-04-15 02:32:45,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:45,077 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:45,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132216886] [2021-04-15 02:32:45,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431786729] [2021-04-15 02:32:45,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:45,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:32:45,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:45,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:32:45,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:45,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:45,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:32:45,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960563058] [2021-04-15 02:32:45,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:32:45,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:45,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:32:45,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:32:45,144 INFO L87 Difference]: Start difference. First operand 3974 states and 11909 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:45,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:45,283 INFO L93 Difference]: Finished difference Result 4435 states and 12955 transitions. [2021-04-15 02:32:45,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:32:45,284 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:45,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:45,289 INFO L225 Difference]: With dead ends: 4435 [2021-04-15 02:32:45,289 INFO L226 Difference]: Without dead ends: 4435 [2021-04-15 02:32:45,289 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:32:45,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4435 states. [2021-04-15 02:32:45,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4435 to 3990. [2021-04-15 02:32:45,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3990 states, 3989 states have (on average 2.995487590874906) internal successors, (11949), 3989 states have internal predecessors, (11949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:45,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3990 states to 3990 states and 11949 transitions. [2021-04-15 02:32:45,340 INFO L78 Accepts]: Start accepts. Automaton has 3990 states and 11949 transitions. Word has length 20 [2021-04-15 02:32:45,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:45,340 INFO L480 AbstractCegarLoop]: Abstraction has 3990 states and 11949 transitions. [2021-04-15 02:32:45,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:45,340 INFO L276 IsEmpty]: Start isEmpty. Operand 3990 states and 11949 transitions. [2021-04-15 02:32:45,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:45,343 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:45,343 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:45,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15587,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:45,543 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:45,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:45,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1831744364, now seen corresponding path program 289 times [2021-04-15 02:32:45,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:45,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119144707] [2021-04-15 02:32:45,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:45,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119144707] [2021-04-15 02:32:45,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122832941] [2021-04-15 02:32:45,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:45,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:45,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:45,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:45,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:45,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:46,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:46,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:46,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:46,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:46,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:46,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:32:46,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792232470] [2021-04-15 02:32:46,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:32:46,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:46,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:32:46,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:32:46,336 INFO L87 Difference]: Start difference. First operand 3990 states and 11949 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:46,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:46,861 INFO L93 Difference]: Finished difference Result 4136 states and 12254 transitions. [2021-04-15 02:32:46,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:32:46,862 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:46,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:46,866 INFO L225 Difference]: With dead ends: 4136 [2021-04-15 02:32:46,866 INFO L226 Difference]: Without dead ends: 4131 [2021-04-15 02:32:46,866 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 411.7ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:32:46,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2021-04-15 02:32:46,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 3990. [2021-04-15 02:32:46,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3990 states, 3989 states have (on average 2.995487590874906) internal successors, (11949), 3989 states have internal predecessors, (11949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:46,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3990 states to 3990 states and 11949 transitions. [2021-04-15 02:32:46,907 INFO L78 Accepts]: Start accepts. Automaton has 3990 states and 11949 transitions. Word has length 20 [2021-04-15 02:32:46,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:46,907 INFO L480 AbstractCegarLoop]: Abstraction has 3990 states and 11949 transitions. [2021-04-15 02:32:46,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:46,907 INFO L276 IsEmpty]: Start isEmpty. Operand 3990 states and 11949 transitions. [2021-04-15 02:32:46,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:46,910 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:46,910 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:47,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15588 [2021-04-15 02:32:47,111 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:47,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:47,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1743603605, now seen corresponding path program 290 times [2021-04-15 02:32:47,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:47,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142995435] [2021-04-15 02:32:47,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:47,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142995435] [2021-04-15 02:32:47,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70075357] [2021-04-15 02:32:47,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:47,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:32:47,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:47,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:32:47,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:47,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:47,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:32:47,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072704524] [2021-04-15 02:32:47,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:32:47,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:47,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:32:47,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:32:47,229 INFO L87 Difference]: Start difference. First operand 3990 states and 11949 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:47,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:47,377 INFO L93 Difference]: Finished difference Result 5817 states and 17279 transitions. [2021-04-15 02:32:47,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:32:47,378 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:47,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:47,384 INFO L225 Difference]: With dead ends: 5817 [2021-04-15 02:32:47,385 INFO L226 Difference]: Without dead ends: 5817 [2021-04-15 02:32:47,385 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:32:47,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5817 states. [2021-04-15 02:32:47,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5817 to 5550. [2021-04-15 02:32:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5550 states, 5549 states have (on average 3.0131555235177507) internal successors, (16720), 5549 states have internal predecessors, (16720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:47,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5550 states to 5550 states and 16720 transitions. [2021-04-15 02:32:47,451 INFO L78 Accepts]: Start accepts. Automaton has 5550 states and 16720 transitions. Word has length 20 [2021-04-15 02:32:47,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:47,451 INFO L480 AbstractCegarLoop]: Abstraction has 5550 states and 16720 transitions. [2021-04-15 02:32:47,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:47,451 INFO L276 IsEmpty]: Start isEmpty. Operand 5550 states and 16720 transitions. [2021-04-15 02:32:47,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:47,455 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:47,455 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:47,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15746,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:47,656 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:47,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:47,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1369131344, now seen corresponding path program 291 times [2021-04-15 02:32:47,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:47,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452042949] [2021-04-15 02:32:47,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:47,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452042949] [2021-04-15 02:32:47,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755305719] [2021-04-15 02:32:47,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:47,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:32:47,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:47,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:47,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:48,125 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:48,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:48,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:48,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:48,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:48,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:48,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:48,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:32:48,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66405577] [2021-04-15 02:32:48,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:32:48,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:48,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:32:48,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:32:48,329 INFO L87 Difference]: Start difference. First operand 5550 states and 16720 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:48,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:48,949 INFO L93 Difference]: Finished difference Result 5762 states and 17201 transitions. [2021-04-15 02:32:48,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:32:48,950 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:48,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:48,956 INFO L225 Difference]: With dead ends: 5762 [2021-04-15 02:32:48,956 INFO L226 Difference]: Without dead ends: 5747 [2021-04-15 02:32:48,957 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 476.2ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:32:48,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5747 states. [2021-04-15 02:32:49,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5747 to 5546. [2021-04-15 02:32:49,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5546 states, 5545 states have (on average 3.012082957619477) internal successors, (16702), 5545 states have internal predecessors, (16702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:49,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5546 states to 5546 states and 16702 transitions. [2021-04-15 02:32:49,026 INFO L78 Accepts]: Start accepts. Automaton has 5546 states and 16702 transitions. Word has length 20 [2021-04-15 02:32:49,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:49,026 INFO L480 AbstractCegarLoop]: Abstraction has 5546 states and 16702 transitions. [2021-04-15 02:32:49,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:49,026 INFO L276 IsEmpty]: Start isEmpty. Operand 5546 states and 16702 transitions. [2021-04-15 02:32:49,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:49,030 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:49,030 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:49,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15747 [2021-04-15 02:32:49,230 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:49,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:49,231 INFO L82 PathProgramCache]: Analyzing trace with hash 2045017425, now seen corresponding path program 292 times [2021-04-15 02:32:49,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:49,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85806256] [2021-04-15 02:32:49,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:49,284 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:49,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85806256] [2021-04-15 02:32:49,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499099209] [2021-04-15 02:32:49,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:49,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:32:49,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:49,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:32:49,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:49,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:49,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:32:49,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716724253] [2021-04-15 02:32:49,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:32:49,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:49,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:32:49,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:32:49,350 INFO L87 Difference]: Start difference. First operand 5546 states and 16702 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:49,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:49,494 INFO L93 Difference]: Finished difference Result 5777 states and 17109 transitions. [2021-04-15 02:32:49,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:32:49,495 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:49,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:49,503 INFO L225 Difference]: With dead ends: 5777 [2021-04-15 02:32:49,503 INFO L226 Difference]: Without dead ends: 5777 [2021-04-15 02:32:49,503 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:32:49,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5777 states. [2021-04-15 02:32:49,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5777 to 5282. [2021-04-15 02:32:49,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5282 states, 5281 states have (on average 2.9988638515432684) internal successors, (15837), 5281 states have internal predecessors, (15837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:49,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5282 states to 5282 states and 15837 transitions. [2021-04-15 02:32:49,573 INFO L78 Accepts]: Start accepts. Automaton has 5282 states and 15837 transitions. Word has length 20 [2021-04-15 02:32:49,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:49,573 INFO L480 AbstractCegarLoop]: Abstraction has 5282 states and 15837 transitions. [2021-04-15 02:32:49,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:49,573 INFO L276 IsEmpty]: Start isEmpty. Operand 5282 states and 15837 transitions. [2021-04-15 02:32:49,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:49,577 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:49,577 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:49,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15835 [2021-04-15 02:32:49,789 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:49,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:49,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1812030484, now seen corresponding path program 293 times [2021-04-15 02:32:49,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:49,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519236080] [2021-04-15 02:32:49,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:49,899 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:49,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519236080] [2021-04-15 02:32:49,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720840317] [2021-04-15 02:32:49,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:49,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:32:49,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:49,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:49,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:50,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:50,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:50,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:50,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:50,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:50,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:50,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:50,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:32:50,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466986897] [2021-04-15 02:32:50,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:32:50,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:50,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:32:50,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:32:50,504 INFO L87 Difference]: Start difference. First operand 5282 states and 15837 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:50,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:50,980 INFO L93 Difference]: Finished difference Result 5451 states and 16210 transitions. [2021-04-15 02:32:50,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:32:50,981 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:50,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:50,988 INFO L225 Difference]: With dead ends: 5451 [2021-04-15 02:32:50,988 INFO L226 Difference]: Without dead ends: 5446 [2021-04-15 02:32:50,988 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 447.4ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:32:50,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5446 states. [2021-04-15 02:32:51,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5446 to 5282. [2021-04-15 02:32:51,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5282 states, 5281 states have (on average 2.9988638515432684) internal successors, (15837), 5281 states have internal predecessors, (15837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:51,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5282 states to 5282 states and 15837 transitions. [2021-04-15 02:32:51,056 INFO L78 Accepts]: Start accepts. Automaton has 5282 states and 15837 transitions. Word has length 20 [2021-04-15 02:32:51,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:51,056 INFO L480 AbstractCegarLoop]: Abstraction has 5282 states and 15837 transitions. [2021-04-15 02:32:51,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:51,057 INFO L276 IsEmpty]: Start isEmpty. Operand 5282 states and 15837 transitions. [2021-04-15 02:32:51,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:51,060 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:51,060 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:51,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15836 [2021-04-15 02:32:51,261 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:51,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:51,261 INFO L82 PathProgramCache]: Analyzing trace with hash -766814933, now seen corresponding path program 294 times [2021-04-15 02:32:51,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:51,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639406204] [2021-04-15 02:32:51,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:51,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639406204] [2021-04-15 02:32:51,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025417291] [2021-04-15 02:32:51,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:51,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:32:51,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:51,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:32:51,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:51,403 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:51,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:51,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:32:51,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57607600] [2021-04-15 02:32:51,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:32:51,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:51,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:32:51,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:32:51,404 INFO L87 Difference]: Start difference. First operand 5282 states and 15837 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:51,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:51,527 INFO L93 Difference]: Finished difference Result 5596 states and 16637 transitions. [2021-04-15 02:32:51,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:32:51,528 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:51,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:51,534 INFO L225 Difference]: With dead ends: 5596 [2021-04-15 02:32:51,534 INFO L226 Difference]: Without dead ends: 5596 [2021-04-15 02:32:51,534 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:32:51,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5596 states. [2021-04-15 02:32:51,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5596 to 5450. [2021-04-15 02:32:51,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5450 states, 5449 states have (on average 2.998715360616627) internal successors, (16340), 5449 states have internal predecessors, (16340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:51,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5450 states to 5450 states and 16340 transitions. [2021-04-15 02:32:51,598 INFO L78 Accepts]: Start accepts. Automaton has 5450 states and 16340 transitions. Word has length 20 [2021-04-15 02:32:51,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:51,598 INFO L480 AbstractCegarLoop]: Abstraction has 5450 states and 16340 transitions. [2021-04-15 02:32:51,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:51,598 INFO L276 IsEmpty]: Start isEmpty. Operand 5450 states and 16340 transitions. [2021-04-15 02:32:51,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:51,602 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:51,602 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:51,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15951 [2021-04-15 02:32:51,803 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:51,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:51,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1637965360, now seen corresponding path program 295 times [2021-04-15 02:32:51,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:51,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553724087] [2021-04-15 02:32:51,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:51,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:51,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553724087] [2021-04-15 02:32:51,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264655716] [2021-04-15 02:32:51,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:51,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:51,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:52,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:52,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:52,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:52,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:52,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:52,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:52,583 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:52,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:52,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:32:52,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107606709] [2021-04-15 02:32:52,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:32:52,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:52,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:32:52,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:32:52,584 INFO L87 Difference]: Start difference. First operand 5450 states and 16340 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:53,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:53,148 INFO L93 Difference]: Finished difference Result 5569 states and 16513 transitions. [2021-04-15 02:32:53,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:32:53,149 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:53,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:53,155 INFO L225 Difference]: With dead ends: 5569 [2021-04-15 02:32:53,155 INFO L226 Difference]: Without dead ends: 5550 [2021-04-15 02:32:53,155 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 521.7ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:32:53,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5550 states. [2021-04-15 02:32:53,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5550 to 5450. [2021-04-15 02:32:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5450 states, 5449 states have (on average 2.9981648008808954) internal successors, (16337), 5449 states have internal predecessors, (16337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:53,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5450 states to 5450 states and 16337 transitions. [2021-04-15 02:32:53,222 INFO L78 Accepts]: Start accepts. Automaton has 5450 states and 16337 transitions. Word has length 20 [2021-04-15 02:32:53,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:53,222 INFO L480 AbstractCegarLoop]: Abstraction has 5450 states and 16337 transitions. [2021-04-15 02:32:53,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:53,222 INFO L276 IsEmpty]: Start isEmpty. Operand 5450 states and 16337 transitions. [2021-04-15 02:32:53,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:53,226 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:53,226 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:53,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15952 [2021-04-15 02:32:53,427 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:53,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:53,427 INFO L82 PathProgramCache]: Analyzing trace with hash -2034272111, now seen corresponding path program 296 times [2021-04-15 02:32:53,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:53,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004576289] [2021-04-15 02:32:53,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:53,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004576289] [2021-04-15 02:32:53,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392386105] [2021-04-15 02:32:53,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:53,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:32:53,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:53,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:32:53,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:53,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:53,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:32:53,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415923818] [2021-04-15 02:32:53,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:32:53,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:53,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:32:53,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:32:53,564 INFO L87 Difference]: Start difference. First operand 5450 states and 16337 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:53,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:53,745 INFO L93 Difference]: Finished difference Result 5644 states and 16739 transitions. [2021-04-15 02:32:53,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:32:53,746 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:53,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:53,752 INFO L225 Difference]: With dead ends: 5644 [2021-04-15 02:32:53,752 INFO L226 Difference]: Without dead ends: 5644 [2021-04-15 02:32:53,752 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:32:53,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5644 states. [2021-04-15 02:32:53,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5644 to 5491. [2021-04-15 02:32:53,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5491 states, 5490 states have (on average 2.9981785063752278) internal successors, (16460), 5490 states have internal predecessors, (16460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:53,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5491 states to 5491 states and 16460 transitions. [2021-04-15 02:32:53,819 INFO L78 Accepts]: Start accepts. Automaton has 5491 states and 16460 transitions. Word has length 20 [2021-04-15 02:32:53,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:53,819 INFO L480 AbstractCegarLoop]: Abstraction has 5491 states and 16460 transitions. [2021-04-15 02:32:53,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:53,819 INFO L276 IsEmpty]: Start isEmpty. Operand 5491 states and 16460 transitions. [2021-04-15 02:32:53,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:53,822 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:53,823 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:54,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16053,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:54,023 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:54,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:54,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1213654124, now seen corresponding path program 297 times [2021-04-15 02:32:54,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:54,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838876217] [2021-04-15 02:32:54,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:54,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:54,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838876217] [2021-04-15 02:32:54,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594040766] [2021-04-15 02:32:54,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:54,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:32:54,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:54,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:32:54,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:54,623 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:54,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:55,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:55,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:55,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:55,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:55,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:55,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:32:55,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454617184] [2021-04-15 02:32:55,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:32:55,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:55,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:32:55,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:32:55,017 INFO L87 Difference]: Start difference. First operand 5491 states and 16460 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:55,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:55,643 INFO L93 Difference]: Finished difference Result 7043 states and 21060 transitions. [2021-04-15 02:32:55,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:32:55,644 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:55,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:55,652 INFO L225 Difference]: With dead ends: 7043 [2021-04-15 02:32:55,652 INFO L226 Difference]: Without dead ends: 7038 [2021-04-15 02:32:55,652 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 637.3ms TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:32:55,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7038 states. [2021-04-15 02:32:55,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7038 to 5493. [2021-04-15 02:32:55,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5493 states, 5492 states have (on average 2.997632920611799) internal successors, (16463), 5492 states have internal predecessors, (16463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:55,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5493 states to 5493 states and 16463 transitions. [2021-04-15 02:32:55,732 INFO L78 Accepts]: Start accepts. Automaton has 5493 states and 16463 transitions. Word has length 20 [2021-04-15 02:32:55,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:55,732 INFO L480 AbstractCegarLoop]: Abstraction has 5493 states and 16463 transitions. [2021-04-15 02:32:55,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:55,732 INFO L276 IsEmpty]: Start isEmpty. Operand 5493 states and 16463 transitions. [2021-04-15 02:32:55,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:32:55,736 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:55,736 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:55,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16054 [2021-04-15 02:32:55,936 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:55,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:55,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1624228331, now seen corresponding path program 298 times [2021-04-15 02:32:55,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:55,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056968452] [2021-04-15 02:32:55,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:56,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056968452] [2021-04-15 02:32:56,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466950243] [2021-04-15 02:32:56,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:56,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:32:56,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:56,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:32:56,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:56,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:56,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:32:56,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393432052] [2021-04-15 02:32:56,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:32:56,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:56,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:32:56,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:32:56,084 INFO L87 Difference]: Start difference. First operand 5493 states and 16463 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:56,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:56,317 INFO L93 Difference]: Finished difference Result 5812 states and 17186 transitions. [2021-04-15 02:32:56,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:32:56,318 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:32:56,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:56,324 INFO L225 Difference]: With dead ends: 5812 [2021-04-15 02:32:56,324 INFO L226 Difference]: Without dead ends: 5812 [2021-04-15 02:32:56,325 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:32:56,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5812 states. [2021-04-15 02:32:56,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5812 to 5528. [2021-04-15 02:32:56,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5528 states, 5527 states have (on average 2.99764791025873) internal successors, (16568), 5527 states have internal predecessors, (16568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:56,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5528 states to 5528 states and 16568 transitions. [2021-04-15 02:32:56,409 INFO L78 Accepts]: Start accepts. Automaton has 5528 states and 16568 transitions. Word has length 20 [2021-04-15 02:32:56,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:56,409 INFO L480 AbstractCegarLoop]: Abstraction has 5528 states and 16568 transitions. [2021-04-15 02:32:56,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:56,409 INFO L276 IsEmpty]: Start isEmpty. Operand 5528 states and 16568 transitions. [2021-04-15 02:32:56,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:32:56,413 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:56,413 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:56,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16227,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:56,621 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:56,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:56,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1322257352, now seen corresponding path program 299 times [2021-04-15 02:32:56,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:56,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803405620] [2021-04-15 02:32:56,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:56,699 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:56,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803405620] [2021-04-15 02:32:56,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526451648] [2021-04-15 02:32:56,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:56,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:32:56,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:56,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:32:56,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:56,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:56,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:32:56,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283710611] [2021-04-15 02:32:56,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:32:56,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:56,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:32:56,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:32:56,772 INFO L87 Difference]: Start difference. First operand 5528 states and 16568 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:56,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:56,946 INFO L93 Difference]: Finished difference Result 5709 states and 16848 transitions. [2021-04-15 02:32:56,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:32:56,947 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:32:56,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:56,954 INFO L225 Difference]: With dead ends: 5709 [2021-04-15 02:32:56,954 INFO L226 Difference]: Without dead ends: 5703 [2021-04-15 02:32:56,954 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:32:56,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5703 states. [2021-04-15 02:32:57,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5703 to 5519. [2021-04-15 02:32:57,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5519 states, 5518 states have (on average 2.996737948532077) internal successors, (16536), 5518 states have internal predecessors, (16536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:57,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5519 states to 5519 states and 16536 transitions. [2021-04-15 02:32:57,024 INFO L78 Accepts]: Start accepts. Automaton has 5519 states and 16536 transitions. Word has length 21 [2021-04-15 02:32:57,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:57,024 INFO L480 AbstractCegarLoop]: Abstraction has 5519 states and 16536 transitions. [2021-04-15 02:32:57,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:57,025 INFO L276 IsEmpty]: Start isEmpty. Operand 5519 states and 16536 transitions. [2021-04-15 02:32:57,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:32:57,029 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:57,029 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:57,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16228,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:57,229 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:57,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:57,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1554817325, now seen corresponding path program 300 times [2021-04-15 02:32:57,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:57,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444605439] [2021-04-15 02:32:57,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:57,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444605439] [2021-04-15 02:32:57,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596454710] [2021-04-15 02:32:57,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:57,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:32:57,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:57,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:32:57,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:57,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:57,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:32:57,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506349553] [2021-04-15 02:32:57,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:32:57,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:57,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:32:57,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:32:57,375 INFO L87 Difference]: Start difference. First operand 5519 states and 16536 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:57,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:57,609 INFO L93 Difference]: Finished difference Result 5835 states and 17177 transitions. [2021-04-15 02:32:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:32:57,610 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:32:57,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:57,615 INFO L225 Difference]: With dead ends: 5835 [2021-04-15 02:32:57,615 INFO L226 Difference]: Without dead ends: 5826 [2021-04-15 02:32:57,615 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 186.0ms TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:32:57,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2021-04-15 02:32:57,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 5556. [2021-04-15 02:32:57,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5556 states, 5555 states have (on average 2.996759675967597) internal successors, (16647), 5555 states have internal predecessors, (16647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:57,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5556 states to 5556 states and 16647 transitions. [2021-04-15 02:32:57,676 INFO L78 Accepts]: Start accepts. Automaton has 5556 states and 16647 transitions. Word has length 21 [2021-04-15 02:32:57,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:57,676 INFO L480 AbstractCegarLoop]: Abstraction has 5556 states and 16647 transitions. [2021-04-15 02:32:57,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:57,677 INFO L276 IsEmpty]: Start isEmpty. Operand 5556 states and 16647 transitions. [2021-04-15 02:32:57,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:32:57,681 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:57,681 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:57,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16229 [2021-04-15 02:32:57,881 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:57,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:57,881 INFO L82 PathProgramCache]: Analyzing trace with hash -395399322, now seen corresponding path program 301 times [2021-04-15 02:32:57,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:57,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457890037] [2021-04-15 02:32:57,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:57,936 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:57,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457890037] [2021-04-15 02:32:57,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819864482] [2021-04-15 02:32:57,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:57,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:32:57,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:58,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:58,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:32:58,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687788064] [2021-04-15 02:32:58,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:32:58,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:58,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:32:58,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:32:58,006 INFO L87 Difference]: Start difference. First operand 5556 states and 16647 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:58,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:58,149 INFO L93 Difference]: Finished difference Result 5621 states and 16745 transitions. [2021-04-15 02:32:58,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:32:58,150 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:32:58,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:58,155 INFO L225 Difference]: With dead ends: 5621 [2021-04-15 02:32:58,155 INFO L226 Difference]: Without dead ends: 5617 [2021-04-15 02:32:58,155 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:32:58,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5617 states. [2021-04-15 02:32:58,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5617 to 5556. [2021-04-15 02:32:58,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5556 states, 5555 states have (on average 2.9962196219621964) internal successors, (16644), 5555 states have internal predecessors, (16644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:58,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5556 states to 5556 states and 16644 transitions. [2021-04-15 02:32:58,213 INFO L78 Accepts]: Start accepts. Automaton has 5556 states and 16644 transitions. Word has length 21 [2021-04-15 02:32:58,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:58,213 INFO L480 AbstractCegarLoop]: Abstraction has 5556 states and 16644 transitions. [2021-04-15 02:32:58,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:58,213 INFO L276 IsEmpty]: Start isEmpty. Operand 5556 states and 16644 transitions. [2021-04-15 02:32:58,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:32:58,216 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:58,216 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:58,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16230 [2021-04-15 02:32:58,417 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:58,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:58,417 INFO L82 PathProgramCache]: Analyzing trace with hash -2031423451, now seen corresponding path program 302 times [2021-04-15 02:32:58,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:58,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622425993] [2021-04-15 02:32:58,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:58,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:58,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622425993] [2021-04-15 02:32:58,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410366948] [2021-04-15 02:32:58,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:58,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:32:58,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:58,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:32:58,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:58,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:58,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:32:58,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768467095] [2021-04-15 02:32:58,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:32:58,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:58,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:32:58,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:32:58,543 INFO L87 Difference]: Start difference. First operand 5556 states and 16644 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:58,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:58,629 INFO L93 Difference]: Finished difference Result 5973 states and 17563 transitions. [2021-04-15 02:32:58,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:32:58,630 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:32:58,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:58,637 INFO L225 Difference]: With dead ends: 5973 [2021-04-15 02:32:58,637 INFO L226 Difference]: Without dead ends: 5973 [2021-04-15 02:32:58,638 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:32:58,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5973 states. [2021-04-15 02:32:58,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5973 to 5549. [2021-04-15 02:32:58,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 2.994953136265321) internal successors, (16616), 5548 states have internal predecessors, (16616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:58,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 16616 transitions. [2021-04-15 02:32:58,711 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 16616 transitions. Word has length 21 [2021-04-15 02:32:58,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:58,711 INFO L480 AbstractCegarLoop]: Abstraction has 5549 states and 16616 transitions. [2021-04-15 02:32:58,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:58,712 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 16616 transitions. [2021-04-15 02:32:58,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:32:58,716 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:58,716 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:58,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16231 [2021-04-15 02:32:58,916 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:58,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:58,916 INFO L82 PathProgramCache]: Analyzing trace with hash -771235884, now seen corresponding path program 303 times [2021-04-15 02:32:58,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:58,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450172650] [2021-04-15 02:32:58,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:58,972 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:58,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450172650] [2021-04-15 02:32:58,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651415504] [2021-04-15 02:32:58,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:58,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:32:58,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:58,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:32:58,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:59,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:59,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:32:59,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963627098] [2021-04-15 02:32:59,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:32:59,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:59,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:32:59,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:32:59,055 INFO L87 Difference]: Start difference. First operand 5549 states and 16616 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:59,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:59,210 INFO L93 Difference]: Finished difference Result 5638 states and 16779 transitions. [2021-04-15 02:32:59,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:32:59,211 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:32:59,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:59,218 INFO L225 Difference]: With dead ends: 5638 [2021-04-15 02:32:59,218 INFO L226 Difference]: Without dead ends: 5634 [2021-04-15 02:32:59,218 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:32:59,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5634 states. [2021-04-15 02:32:59,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5634 to 5549. [2021-04-15 02:32:59,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 2.994592645998558) internal successors, (16614), 5548 states have internal predecessors, (16614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:59,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 16614 transitions. [2021-04-15 02:32:59,285 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 16614 transitions. Word has length 21 [2021-04-15 02:32:59,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:59,285 INFO L480 AbstractCegarLoop]: Abstraction has 5549 states and 16614 transitions. [2021-04-15 02:32:59,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:59,285 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 16614 transitions. [2021-04-15 02:32:59,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:32:59,289 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:59,289 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:59,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16232 [2021-04-15 02:32:59,490 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:59,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:59,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1662557515, now seen corresponding path program 304 times [2021-04-15 02:32:59,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:59,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373637323] [2021-04-15 02:32:59,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:59,541 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:59,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373637323] [2021-04-15 02:32:59,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274874547] [2021-04-15 02:32:59,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:59,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:32:59,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:59,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:32:59,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:59,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:59,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:32:59,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706606399] [2021-04-15 02:32:59,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:32:59,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:59,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:32:59,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:32:59,604 INFO L87 Difference]: Start difference. First operand 5549 states and 16614 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:59,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:59,701 INFO L93 Difference]: Finished difference Result 6298 states and 18497 transitions. [2021-04-15 02:32:59,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:32:59,701 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:32:59,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:59,709 INFO L225 Difference]: With dead ends: 6298 [2021-04-15 02:32:59,709 INFO L226 Difference]: Without dead ends: 6298 [2021-04-15 02:32:59,709 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:32:59,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6298 states. [2021-04-15 02:32:59,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6298 to 5549. [2021-04-15 02:32:59,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 2.994592645998558) internal successors, (16614), 5548 states have internal predecessors, (16614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:59,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 16614 transitions. [2021-04-15 02:32:59,783 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 16614 transitions. Word has length 21 [2021-04-15 02:32:59,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:59,783 INFO L480 AbstractCegarLoop]: Abstraction has 5549 states and 16614 transitions. [2021-04-15 02:32:59,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:59,783 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 16614 transitions. [2021-04-15 02:32:59,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:32:59,787 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:59,787 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:59,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16233 [2021-04-15 02:32:59,987 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:59,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:59,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1771892424, now seen corresponding path program 305 times [2021-04-15 02:32:59,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:59,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24124027] [2021-04-15 02:32:59,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:00,045 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:00,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24124027] [2021-04-15 02:33:00,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562144271] [2021-04-15 02:33:00,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:00,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:33:00,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:00,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:00,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:33:00,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:00,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:33:00,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233321554] [2021-04-15 02:33:00,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:33:00,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:00,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:33:00,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:33:00,113 INFO L87 Difference]: Start difference. First operand 5549 states and 16614 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:00,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:00,224 INFO L93 Difference]: Finished difference Result 5861 states and 17231 transitions. [2021-04-15 02:33:00,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:33:00,225 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:00,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:00,231 INFO L225 Difference]: With dead ends: 5861 [2021-04-15 02:33:00,232 INFO L226 Difference]: Without dead ends: 5859 [2021-04-15 02:33:00,232 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:33:00,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5859 states. [2021-04-15 02:33:00,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5859 to 5592. [2021-04-15 02:33:00,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5592 states, 5591 states have (on average 2.996959399034162) internal successors, (16756), 5591 states have internal predecessors, (16756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:00,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5592 states to 5592 states and 16756 transitions. [2021-04-15 02:33:00,302 INFO L78 Accepts]: Start accepts. Automaton has 5592 states and 16756 transitions. Word has length 21 [2021-04-15 02:33:00,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:00,302 INFO L480 AbstractCegarLoop]: Abstraction has 5592 states and 16756 transitions. [2021-04-15 02:33:00,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:00,302 INFO L276 IsEmpty]: Start isEmpty. Operand 5592 states and 16756 transitions. [2021-04-15 02:33:00,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:00,306 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:00,306 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:00,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16234 [2021-04-15 02:33:00,507 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:00,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:00,507 INFO L82 PathProgramCache]: Analyzing trace with hash 994742825, now seen corresponding path program 306 times [2021-04-15 02:33:00,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:00,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541334592] [2021-04-15 02:33:00,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:00,553 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:00,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541334592] [2021-04-15 02:33:00,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143860375] [2021-04-15 02:33:00,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:00,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:33:00,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:00,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:00,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:00,614 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:33:00,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:00,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:33:00,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234116519] [2021-04-15 02:33:00,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:33:00,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:00,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:33:00,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:33:00,614 INFO L87 Difference]: Start difference. First operand 5592 states and 16756 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:00,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:00,766 INFO L93 Difference]: Finished difference Result 5825 states and 17153 transitions. [2021-04-15 02:33:00,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:33:00,767 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:00,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:00,773 INFO L225 Difference]: With dead ends: 5825 [2021-04-15 02:33:00,773 INFO L226 Difference]: Without dead ends: 5823 [2021-04-15 02:33:00,773 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:33:00,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5823 states. [2021-04-15 02:33:00,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5823 to 5602. [2021-04-15 02:33:00,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5602 states, 5601 states have (on average 2.997143367255847) internal successors, (16787), 5601 states have internal predecessors, (16787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5602 states to 5602 states and 16787 transitions. [2021-04-15 02:33:00,845 INFO L78 Accepts]: Start accepts. Automaton has 5602 states and 16787 transitions. Word has length 21 [2021-04-15 02:33:00,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:00,845 INFO L480 AbstractCegarLoop]: Abstraction has 5602 states and 16787 transitions. [2021-04-15 02:33:00,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:00,845 INFO L276 IsEmpty]: Start isEmpty. Operand 5602 states and 16787 transitions. [2021-04-15 02:33:00,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:00,849 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:00,849 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:01,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16235,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:01,050 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:01,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:01,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1535817962, now seen corresponding path program 307 times [2021-04-15 02:33:01,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:01,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509793467] [2021-04-15 02:33:01,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:01,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509793467] [2021-04-15 02:33:01,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391572223] [2021-04-15 02:33:01,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:01,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:01,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:01,165 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:01,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:01,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:33:01,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530600774] [2021-04-15 02:33:01,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:33:01,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:01,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:33:01,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:33:01,166 INFO L87 Difference]: Start difference. First operand 5602 states and 16787 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:01,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:01,310 INFO L93 Difference]: Finished difference Result 5786 states and 17096 transitions. [2021-04-15 02:33:01,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:33:01,310 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:01,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:01,315 INFO L225 Difference]: With dead ends: 5786 [2021-04-15 02:33:01,316 INFO L226 Difference]: Without dead ends: 5778 [2021-04-15 02:33:01,316 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:33:01,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5778 states. [2021-04-15 02:33:01,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5778 to 5570. [2021-04-15 02:33:01,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5570 states, 5569 states have (on average 2.995151732806608) internal successors, (16680), 5569 states have internal predecessors, (16680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:01,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5570 states to 5570 states and 16680 transitions. [2021-04-15 02:33:01,378 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 16680 transitions. Word has length 21 [2021-04-15 02:33:01,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:01,379 INFO L480 AbstractCegarLoop]: Abstraction has 5570 states and 16680 transitions. [2021-04-15 02:33:01,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:01,379 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 16680 transitions. [2021-04-15 02:33:01,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:01,383 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:01,383 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:01,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16236 [2021-04-15 02:33:01,584 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:01,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:01,584 INFO L82 PathProgramCache]: Analyzing trace with hash 644496331, now seen corresponding path program 308 times [2021-04-15 02:33:01,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:01,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488782437] [2021-04-15 02:33:01,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:01,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488782437] [2021-04-15 02:33:01,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113181515] [2021-04-15 02:33:01,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:01,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:33:01,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:01,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:01,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:01,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:01,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:33:01,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278904658] [2021-04-15 02:33:01,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:33:01,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:01,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:33:01,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:33:01,725 INFO L87 Difference]: Start difference. First operand 5570 states and 16680 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:01,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:01,824 INFO L93 Difference]: Finished difference Result 6267 states and 18410 transitions. [2021-04-15 02:33:01,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:33:01,824 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:01,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:01,831 INFO L225 Difference]: With dead ends: 6267 [2021-04-15 02:33:01,832 INFO L226 Difference]: Without dead ends: 6267 [2021-04-15 02:33:01,832 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:33:01,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6267 states. [2021-04-15 02:33:01,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6267 to 5560. [2021-04-15 02:33:01,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5560 states, 5559 states have (on average 2.99388379204893) internal successors, (16643), 5559 states have internal predecessors, (16643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:01,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 16643 transitions. [2021-04-15 02:33:01,905 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 16643 transitions. Word has length 21 [2021-04-15 02:33:01,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:01,905 INFO L480 AbstractCegarLoop]: Abstraction has 5560 states and 16643 transitions. [2021-04-15 02:33:01,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:01,906 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 16643 transitions. [2021-04-15 02:33:01,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:01,910 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:01,910 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:02,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16237,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:02,110 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:02,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:02,111 INFO L82 PathProgramCache]: Analyzing trace with hash 462732582, now seen corresponding path program 309 times [2021-04-15 02:33:02,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:02,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966179215] [2021-04-15 02:33:02,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:02,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966179215] [2021-04-15 02:33:02,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010117908] [2021-04-15 02:33:02,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:02,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:33:02,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:02,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:02,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:02,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:02,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:33:02,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594895518] [2021-04-15 02:33:02,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:33:02,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:02,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:33:02,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:33:02,232 INFO L87 Difference]: Start difference. First operand 5560 states and 16643 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:02,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:02,396 INFO L93 Difference]: Finished difference Result 5734 states and 16945 transitions. [2021-04-15 02:33:02,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:33:02,397 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:02,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:02,403 INFO L225 Difference]: With dead ends: 5734 [2021-04-15 02:33:02,403 INFO L226 Difference]: Without dead ends: 5728 [2021-04-15 02:33:02,403 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 100.7ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:33:02,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5728 states. [2021-04-15 02:33:02,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5728 to 5560. [2021-04-15 02:33:02,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5560 states, 5559 states have (on average 2.993344126641482) internal successors, (16640), 5559 states have internal predecessors, (16640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:02,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 16640 transitions. [2021-04-15 02:33:02,476 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 16640 transitions. Word has length 21 [2021-04-15 02:33:02,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:02,476 INFO L480 AbstractCegarLoop]: Abstraction has 5560 states and 16640 transitions. [2021-04-15 02:33:02,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:02,476 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 16640 transitions. [2021-04-15 02:33:02,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:02,480 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:02,480 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:02,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16238,314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:02,680 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:02,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:02,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1182351909, now seen corresponding path program 310 times [2021-04-15 02:33:02,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:02,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515484729] [2021-04-15 02:33:02,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:02,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515484729] [2021-04-15 02:33:02,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274183502] [2021-04-15 02:33:02,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:02,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:33:02,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:02,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:02,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:02,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:02,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:33:02,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224098047] [2021-04-15 02:33:02,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:33:02,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:02,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:33:02,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:33:02,805 INFO L87 Difference]: Start difference. First operand 5560 states and 16640 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:02,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:02,947 INFO L93 Difference]: Finished difference Result 6745 states and 19766 transitions. [2021-04-15 02:33:02,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:33:02,948 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:02,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:02,955 INFO L225 Difference]: With dead ends: 6745 [2021-04-15 02:33:02,955 INFO L226 Difference]: Without dead ends: 6745 [2021-04-15 02:33:02,955 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:33:02,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6745 states. [2021-04-15 02:33:03,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6745 to 5531. [2021-04-15 02:33:03,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5531 states, 5530 states have (on average 2.992405063291139) internal successors, (16548), 5530 states have internal predecessors, (16548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:03,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5531 states to 5531 states and 16548 transitions. [2021-04-15 02:33:03,031 INFO L78 Accepts]: Start accepts. Automaton has 5531 states and 16548 transitions. Word has length 21 [2021-04-15 02:33:03,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:03,031 INFO L480 AbstractCegarLoop]: Abstraction has 5531 states and 16548 transitions. [2021-04-15 02:33:03,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:03,031 INFO L276 IsEmpty]: Start isEmpty. Operand 5531 states and 16548 transitions. [2021-04-15 02:33:03,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:03,036 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:03,036 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:03,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16239,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:03,236 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:03,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:03,236 INFO L82 PathProgramCache]: Analyzing trace with hash 276117618, now seen corresponding path program 311 times [2021-04-15 02:33:03,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:03,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965814738] [2021-04-15 02:33:03,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:03,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965814738] [2021-04-15 02:33:03,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96603325] [2021-04-15 02:33:03,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:03,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:33:03,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:03,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:03,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:03,347 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:33:03,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:03,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:33:03,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574093513] [2021-04-15 02:33:03,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:33:03,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:03,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:33:03,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:33:03,348 INFO L87 Difference]: Start difference. First operand 5531 states and 16548 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:03,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:03,435 INFO L93 Difference]: Finished difference Result 5788 states and 17031 transitions. [2021-04-15 02:33:03,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:33:03,436 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:03,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:03,442 INFO L225 Difference]: With dead ends: 5788 [2021-04-15 02:33:03,442 INFO L226 Difference]: Without dead ends: 5786 [2021-04-15 02:33:03,442 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:33:03,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2021-04-15 02:33:03,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 5550. [2021-04-15 02:33:03,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5550 states, 5549 states have (on average 2.9938727698684446) internal successors, (16613), 5549 states have internal predecessors, (16613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:03,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5550 states to 5550 states and 16613 transitions. [2021-04-15 02:33:03,506 INFO L78 Accepts]: Start accepts. Automaton has 5550 states and 16613 transitions. Word has length 21 [2021-04-15 02:33:03,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:03,506 INFO L480 AbstractCegarLoop]: Abstraction has 5550 states and 16613 transitions. [2021-04-15 02:33:03,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:03,506 INFO L276 IsEmpty]: Start isEmpty. Operand 5550 states and 16613 transitions. [2021-04-15 02:33:03,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:03,510 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:03,510 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:03,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16240,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:03,711 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:03,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:03,711 INFO L82 PathProgramCache]: Analyzing trace with hash -501031981, now seen corresponding path program 312 times [2021-04-15 02:33:03,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:03,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399300786] [2021-04-15 02:33:03,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:03,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399300786] [2021-04-15 02:33:03,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164342714] [2021-04-15 02:33:03,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:03,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:33:03,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:03,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:03,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:33:03,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:03,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:33:03,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573781867] [2021-04-15 02:33:03,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:33:03,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:03,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:33:03,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:33:03,816 INFO L87 Difference]: Start difference. First operand 5550 states and 16613 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:03,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:03,955 INFO L93 Difference]: Finished difference Result 5761 states and 16965 transitions. [2021-04-15 02:33:03,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:33:03,956 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:03,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:03,963 INFO L225 Difference]: With dead ends: 5761 [2021-04-15 02:33:03,963 INFO L226 Difference]: Without dead ends: 5759 [2021-04-15 02:33:03,963 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:33:03,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5759 states. [2021-04-15 02:33:04,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5759 to 5562. [2021-04-15 02:33:04,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5562 states, 5561 states have (on average 2.994425463046215) internal successors, (16652), 5561 states have internal predecessors, (16652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5562 states to 5562 states and 16652 transitions. [2021-04-15 02:33:04,048 INFO L78 Accepts]: Start accepts. Automaton has 5562 states and 16652 transitions. Word has length 21 [2021-04-15 02:33:04,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:04,048 INFO L480 AbstractCegarLoop]: Abstraction has 5562 states and 16652 transitions. [2021-04-15 02:33:04,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:04,048 INFO L276 IsEmpty]: Start isEmpty. Operand 5562 states and 16652 transitions. [2021-04-15 02:33:04,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:04,053 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:04,053 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:04,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16241 [2021-04-15 02:33:04,253 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:04,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:04,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1033042224, now seen corresponding path program 313 times [2021-04-15 02:33:04,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:04,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126781230] [2021-04-15 02:33:04,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:04,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126781230] [2021-04-15 02:33:04,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721146495] [2021-04-15 02:33:04,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:04,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:04,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:04,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:04,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:33:04,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078625736] [2021-04-15 02:33:04,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:33:04,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:04,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:33:04,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:33:04,374 INFO L87 Difference]: Start difference. First operand 5562 states and 16652 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:04,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:04,566 INFO L93 Difference]: Finished difference Result 5736 states and 16954 transitions. [2021-04-15 02:33:04,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:33:04,567 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:04,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:04,573 INFO L225 Difference]: With dead ends: 5736 [2021-04-15 02:33:04,574 INFO L226 Difference]: Without dead ends: 5730 [2021-04-15 02:33:04,574 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:33:04,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5730 states. [2021-04-15 02:33:04,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5730 to 5534. [2021-04-15 02:33:04,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5534 states, 5533 states have (on average 2.9942165190674137) internal successors, (16567), 5533 states have internal predecessors, (16567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:04,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5534 states to 5534 states and 16567 transitions. [2021-04-15 02:33:04,646 INFO L78 Accepts]: Start accepts. Automaton has 5534 states and 16567 transitions. Word has length 21 [2021-04-15 02:33:04,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:04,646 INFO L480 AbstractCegarLoop]: Abstraction has 5534 states and 16567 transitions. [2021-04-15 02:33:04,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:04,646 INFO L276 IsEmpty]: Start isEmpty. Operand 5534 states and 16567 transitions. [2021-04-15 02:33:04,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:04,650 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:04,650 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:04,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16242 [2021-04-15 02:33:04,850 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:04,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:04,851 INFO L82 PathProgramCache]: Analyzing trace with hash -313422897, now seen corresponding path program 314 times [2021-04-15 02:33:04,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:04,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66040226] [2021-04-15 02:33:04,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:04,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66040226] [2021-04-15 02:33:04,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345368304] [2021-04-15 02:33:04,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:04,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:33:04,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:04,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:04,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:04,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:04,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:33:04,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945153576] [2021-04-15 02:33:04,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:33:04,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:04,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:33:04,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:33:04,976 INFO L87 Difference]: Start difference. First operand 5534 states and 16567 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:05,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:05,095 INFO L93 Difference]: Finished difference Result 6490 states and 19040 transitions. [2021-04-15 02:33:05,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:33:05,096 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:05,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:05,102 INFO L225 Difference]: With dead ends: 6490 [2021-04-15 02:33:05,102 INFO L226 Difference]: Without dead ends: 6490 [2021-04-15 02:33:05,102 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:33:05,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6490 states. [2021-04-15 02:33:05,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6490 to 5526. [2021-04-15 02:33:05,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5526 states, 5525 states have (on average 2.9931221719457013) internal successors, (16537), 5525 states have internal predecessors, (16537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5526 states to 5526 states and 16537 transitions. [2021-04-15 02:33:05,166 INFO L78 Accepts]: Start accepts. Automaton has 5526 states and 16537 transitions. Word has length 21 [2021-04-15 02:33:05,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:05,166 INFO L480 AbstractCegarLoop]: Abstraction has 5526 states and 16537 transitions. [2021-04-15 02:33:05,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:05,167 INFO L276 IsEmpty]: Start isEmpty. Operand 5526 states and 16537 transitions. [2021-04-15 02:33:05,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:05,170 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:05,170 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:05,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16243 [2021-04-15 02:33:05,371 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:05,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:05,371 INFO L82 PathProgramCache]: Analyzing trace with hash 61049364, now seen corresponding path program 315 times [2021-04-15 02:33:05,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:05,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102052682] [2021-04-15 02:33:05,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:05,433 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:05,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102052682] [2021-04-15 02:33:05,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877120399] [2021-04-15 02:33:05,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:05,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:33:05,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:05,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:05,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:05,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:05,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:33:05,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290742710] [2021-04-15 02:33:05,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:33:05,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:05,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:33:05,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:33:05,496 INFO L87 Difference]: Start difference. First operand 5526 states and 16537 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:05,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:05,647 INFO L93 Difference]: Finished difference Result 5752 states and 17010 transitions. [2021-04-15 02:33:05,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:33:05,647 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:05,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:05,654 INFO L225 Difference]: With dead ends: 5752 [2021-04-15 02:33:05,654 INFO L226 Difference]: Without dead ends: 5744 [2021-04-15 02:33:05,654 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:33:05,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5744 states. [2021-04-15 02:33:05,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5744 to 5527. [2021-04-15 02:33:05,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5527 states, 5526 states have (on average 2.9927614911328266) internal successors, (16538), 5526 states have internal predecessors, (16538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:05,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5527 states to 5527 states and 16538 transitions. [2021-04-15 02:33:05,722 INFO L78 Accepts]: Start accepts. Automaton has 5527 states and 16538 transitions. Word has length 21 [2021-04-15 02:33:05,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:05,722 INFO L480 AbstractCegarLoop]: Abstraction has 5527 states and 16538 transitions. [2021-04-15 02:33:05,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:05,722 INFO L276 IsEmpty]: Start isEmpty. Operand 5527 states and 16538 transitions. [2021-04-15 02:33:05,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:05,726 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:05,726 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:05,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16244 [2021-04-15 02:33:05,927 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:05,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:05,927 INFO L82 PathProgramCache]: Analyzing trace with hash -819769163, now seen corresponding path program 316 times [2021-04-15 02:33:05,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:05,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086920414] [2021-04-15 02:33:05,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:05,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086920414] [2021-04-15 02:33:05,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787674575] [2021-04-15 02:33:05,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:06,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:33:06,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:06,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:06,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:06,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:06,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:33:06,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666990066] [2021-04-15 02:33:06,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:33:06,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:06,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:33:06,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:33:06,060 INFO L87 Difference]: Start difference. First operand 5527 states and 16538 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:06,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:06,230 INFO L93 Difference]: Finished difference Result 7065 states and 20726 transitions. [2021-04-15 02:33:06,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:33:06,231 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:06,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:06,239 INFO L225 Difference]: With dead ends: 7065 [2021-04-15 02:33:06,240 INFO L226 Difference]: Without dead ends: 7065 [2021-04-15 02:33:06,240 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:33:06,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7065 states. [2021-04-15 02:33:06,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7065 to 5559. [2021-04-15 02:33:06,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5559 states, 5558 states have (on average 2.9899244332493704) internal successors, (16618), 5558 states have internal predecessors, (16618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:06,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5559 states to 5559 states and 16618 transitions. [2021-04-15 02:33:06,317 INFO L78 Accepts]: Start accepts. Automaton has 5559 states and 16618 transitions. Word has length 21 [2021-04-15 02:33:06,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:06,317 INFO L480 AbstractCegarLoop]: Abstraction has 5559 states and 16618 transitions. [2021-04-15 02:33:06,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:06,317 INFO L276 IsEmpty]: Start isEmpty. Operand 5559 states and 16618 transitions. [2021-04-15 02:33:06,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:06,321 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:06,321 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:06,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16245,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:06,521 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:06,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:06,521 INFO L82 PathProgramCache]: Analyzing trace with hash -2090839484, now seen corresponding path program 317 times [2021-04-15 02:33:06,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:06,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004118121] [2021-04-15 02:33:06,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:06,584 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:06,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004118121] [2021-04-15 02:33:06,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294228162] [2021-04-15 02:33:06,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:06,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:33:06,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:06,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:06,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:06,644 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:06,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:06,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:33:06,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256746746] [2021-04-15 02:33:06,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:33:06,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:06,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:33:06,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:33:06,645 INFO L87 Difference]: Start difference. First operand 5559 states and 16618 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:06,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:06,828 INFO L93 Difference]: Finished difference Result 5721 states and 16907 transitions. [2021-04-15 02:33:06,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:33:06,829 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:06,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:06,835 INFO L225 Difference]: With dead ends: 5721 [2021-04-15 02:33:06,835 INFO L226 Difference]: Without dead ends: 5713 [2021-04-15 02:33:06,835 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:33:06,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5713 states. [2021-04-15 02:33:06,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5713 to 5559. [2021-04-15 02:33:06,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5559 states, 5558 states have (on average 2.989564591579705) internal successors, (16616), 5558 states have internal predecessors, (16616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:06,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5559 states to 5559 states and 16616 transitions. [2021-04-15 02:33:06,907 INFO L78 Accepts]: Start accepts. Automaton has 5559 states and 16616 transitions. Word has length 21 [2021-04-15 02:33:06,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:06,907 INFO L480 AbstractCegarLoop]: Abstraction has 5559 states and 16616 transitions. [2021-04-15 02:33:06,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:06,907 INFO L276 IsEmpty]: Start isEmpty. Operand 5559 states and 16616 transitions. [2021-04-15 02:33:06,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:06,912 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:06,912 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:07,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16246 [2021-04-15 02:33:07,126 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:07,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:07,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1323309285, now seen corresponding path program 318 times [2021-04-15 02:33:07,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:07,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054532187] [2021-04-15 02:33:07,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:07,185 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:07,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054532187] [2021-04-15 02:33:07,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794141812] [2021-04-15 02:33:07,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:07,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:33:07,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:07,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:07,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:07,256 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:07,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:07,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:33:07,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256675444] [2021-04-15 02:33:07,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:33:07,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:07,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:33:07,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:33:07,257 INFO L87 Difference]: Start difference. First operand 5559 states and 16616 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:07,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:07,420 INFO L93 Difference]: Finished difference Result 7043 states and 20681 transitions. [2021-04-15 02:33:07,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:33:07,421 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:07,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:07,430 INFO L225 Difference]: With dead ends: 7043 [2021-04-15 02:33:07,430 INFO L226 Difference]: Without dead ends: 7043 [2021-04-15 02:33:07,430 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:33:07,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7043 states. [2021-04-15 02:33:07,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7043 to 3914. [2021-04-15 02:33:07,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3914 states, 3913 states have (on average 2.9608995655507284) internal successors, (11586), 3913 states have internal predecessors, (11586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:07,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3914 states to 3914 states and 11586 transitions. [2021-04-15 02:33:07,498 INFO L78 Accepts]: Start accepts. Automaton has 3914 states and 11586 transitions. Word has length 21 [2021-04-15 02:33:07,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:07,498 INFO L480 AbstractCegarLoop]: Abstraction has 3914 states and 11586 transitions. [2021-04-15 02:33:07,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:07,498 INFO L276 IsEmpty]: Start isEmpty. Operand 3914 states and 11586 transitions. [2021-04-15 02:33:07,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:07,501 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:07,501 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:07,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16247 [2021-04-15 02:33:07,701 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:07,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:07,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1151738888, now seen corresponding path program 319 times [2021-04-15 02:33:07,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:07,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671243561] [2021-04-15 02:33:07,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:07,743 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:07,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671243561] [2021-04-15 02:33:07,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708285254] [2021-04-15 02:33:07,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:07,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:07,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:07,803 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:33:07,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:07,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:33:07,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054726515] [2021-04-15 02:33:07,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:33:07,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:07,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:33:07,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:33:07,804 INFO L87 Difference]: Start difference. First operand 3914 states and 11586 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:07,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:07,882 INFO L93 Difference]: Finished difference Result 4174 states and 12068 transitions. [2021-04-15 02:33:07,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:33:07,883 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:07,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:07,887 INFO L225 Difference]: With dead ends: 4174 [2021-04-15 02:33:07,888 INFO L226 Difference]: Without dead ends: 4172 [2021-04-15 02:33:07,888 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:33:07,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2021-04-15 02:33:07,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 3916. [2021-04-15 02:33:07,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 2.9591315453384417) internal successors, (11585), 3915 states have internal predecessors, (11585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:07,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 11585 transitions. [2021-04-15 02:33:07,933 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 11585 transitions. Word has length 21 [2021-04-15 02:33:07,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:07,933 INFO L480 AbstractCegarLoop]: Abstraction has 3916 states and 11585 transitions. [2021-04-15 02:33:07,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:07,933 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 11585 transitions. [2021-04-15 02:33:07,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:07,936 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:07,936 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:08,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16248,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:08,137 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:08,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:08,137 INFO L82 PathProgramCache]: Analyzing trace with hash 374589289, now seen corresponding path program 320 times [2021-04-15 02:33:08,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:08,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729372197] [2021-04-15 02:33:08,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:08,182 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:08,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729372197] [2021-04-15 02:33:08,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672237445] [2021-04-15 02:33:08,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:08,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:33:08,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:08,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:08,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:33:08,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:08,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:33:08,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913631459] [2021-04-15 02:33:08,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:33:08,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:08,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:33:08,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:33:08,242 INFO L87 Difference]: Start difference. First operand 3916 states and 11585 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:08,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:08,383 INFO L93 Difference]: Finished difference Result 4111 states and 11901 transitions. [2021-04-15 02:33:08,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:33:08,384 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:08,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:08,388 INFO L225 Difference]: With dead ends: 4111 [2021-04-15 02:33:08,388 INFO L226 Difference]: Without dead ends: 4107 [2021-04-15 02:33:08,388 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:33:08,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2021-04-15 02:33:08,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 3926. [2021-04-15 02:33:08,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3925 states have (on average 2.959235668789809) internal successors, (11615), 3925 states have internal predecessors, (11615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:08,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 11615 transitions. [2021-04-15 02:33:08,433 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 11615 transitions. Word has length 21 [2021-04-15 02:33:08,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:08,433 INFO L480 AbstractCegarLoop]: Abstraction has 3926 states and 11615 transitions. [2021-04-15 02:33:08,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:08,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 11615 transitions. [2021-04-15 02:33:08,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:08,436 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:08,436 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:08,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16249,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:08,636 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:08,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:08,637 INFO L82 PathProgramCache]: Analyzing trace with hash 915664426, now seen corresponding path program 321 times [2021-04-15 02:33:08,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:08,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4529871] [2021-04-15 02:33:08,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:08,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4529871] [2021-04-15 02:33:08,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11331057] [2021-04-15 02:33:08,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:08,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:33:08,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:08,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:08,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:08,755 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:08,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:08,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:33:08,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469156665] [2021-04-15 02:33:08,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:33:08,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:08,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:33:08,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:33:08,756 INFO L87 Difference]: Start difference. First operand 3926 states and 11615 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:08,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:08,924 INFO L93 Difference]: Finished difference Result 4151 states and 11987 transitions. [2021-04-15 02:33:08,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:33:08,925 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:08,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:08,929 INFO L225 Difference]: With dead ends: 4151 [2021-04-15 02:33:08,930 INFO L226 Difference]: Without dead ends: 4139 [2021-04-15 02:33:08,930 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:33:08,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2021-04-15 02:33:08,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 3894. [2021-04-15 02:33:08,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3894 states, 3893 states have (on average 2.959671204726432) internal successors, (11522), 3893 states have internal predecessors, (11522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:08,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3894 states to 3894 states and 11522 transitions. [2021-04-15 02:33:08,978 INFO L78 Accepts]: Start accepts. Automaton has 3894 states and 11522 transitions. Word has length 21 [2021-04-15 02:33:08,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:08,978 INFO L480 AbstractCegarLoop]: Abstraction has 3894 states and 11522 transitions. [2021-04-15 02:33:08,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:08,978 INFO L276 IsEmpty]: Start isEmpty. Operand 3894 states and 11522 transitions. [2021-04-15 02:33:08,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:08,982 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:08,982 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:09,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16250 [2021-04-15 02:33:09,182 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:09,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:09,183 INFO L82 PathProgramCache]: Analyzing trace with hash 24342795, now seen corresponding path program 322 times [2021-04-15 02:33:09,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:09,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818140258] [2021-04-15 02:33:09,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:09,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818140258] [2021-04-15 02:33:09,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323655353] [2021-04-15 02:33:09,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:09,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:33:09,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:09,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:09,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:09,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:09,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:33:09,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227113390] [2021-04-15 02:33:09,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:33:09,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:09,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:33:09,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:33:09,294 INFO L87 Difference]: Start difference. First operand 3894 states and 11522 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:09,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:09,387 INFO L93 Difference]: Finished difference Result 4318 states and 12449 transitions. [2021-04-15 02:33:09,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:33:09,388 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:09,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:09,392 INFO L225 Difference]: With dead ends: 4318 [2021-04-15 02:33:09,392 INFO L226 Difference]: Without dead ends: 4318 [2021-04-15 02:33:09,392 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:33:09,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4318 states. [2021-04-15 02:33:09,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4318 to 3872. [2021-04-15 02:33:09,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3872 states, 3871 states have (on average 2.9571170240247997) internal successors, (11447), 3871 states have internal predecessors, (11447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3872 states to 3872 states and 11447 transitions. [2021-04-15 02:33:09,436 INFO L78 Accepts]: Start accepts. Automaton has 3872 states and 11447 transitions. Word has length 21 [2021-04-15 02:33:09,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:09,436 INFO L480 AbstractCegarLoop]: Abstraction has 3872 states and 11447 transitions. [2021-04-15 02:33:09,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:09,436 INFO L276 IsEmpty]: Start isEmpty. Operand 3872 states and 11447 transitions. [2021-04-15 02:33:09,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:09,439 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:09,439 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:09,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16251 [2021-04-15 02:33:09,640 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:09,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:09,640 INFO L82 PathProgramCache]: Analyzing trace with hash 936670634, now seen corresponding path program 323 times [2021-04-15 02:33:09,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:09,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204170464] [2021-04-15 02:33:09,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:09,700 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:09,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204170464] [2021-04-15 02:33:09,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398238620] [2021-04-15 02:33:09,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:09,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:33:09,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:09,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:09,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:09,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:09,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:33:09,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803552475] [2021-04-15 02:33:09,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:33:09,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:09,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:33:09,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:33:09,784 INFO L87 Difference]: Start difference. First operand 3872 states and 11447 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:09,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:09,973 INFO L93 Difference]: Finished difference Result 4056 states and 11770 transitions. [2021-04-15 02:33:09,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:33:09,974 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:09,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:09,978 INFO L225 Difference]: With dead ends: 4056 [2021-04-15 02:33:09,978 INFO L226 Difference]: Without dead ends: 4048 [2021-04-15 02:33:09,978 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 132.5ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:33:09,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4048 states. [2021-04-15 02:33:10,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4048 to 3878. [2021-04-15 02:33:10,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.9551199380964666) internal successors, (11457), 3877 states have internal predecessors, (11457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:10,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 11457 transitions. [2021-04-15 02:33:10,022 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 11457 transitions. Word has length 21 [2021-04-15 02:33:10,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:10,023 INFO L480 AbstractCegarLoop]: Abstraction has 3878 states and 11457 transitions. [2021-04-15 02:33:10,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:10,023 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 11457 transitions. [2021-04-15 02:33:10,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:10,026 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:10,026 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:10,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16252,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:10,226 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:10,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:10,226 INFO L82 PathProgramCache]: Analyzing trace with hash 55852107, now seen corresponding path program 324 times [2021-04-15 02:33:10,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:10,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304408673] [2021-04-15 02:33:10,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:10,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:10,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304408673] [2021-04-15 02:33:10,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363312273] [2021-04-15 02:33:10,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:10,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:33:10,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:10,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:10,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:10,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:10,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:33:10,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222857413] [2021-04-15 02:33:10,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:33:10,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:10,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:33:10,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:33:10,360 INFO L87 Difference]: Start difference. First operand 3878 states and 11457 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:10,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:10,501 INFO L93 Difference]: Finished difference Result 4744 states and 13653 transitions. [2021-04-15 02:33:10,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:33:10,502 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:10,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:10,507 INFO L225 Difference]: With dead ends: 4744 [2021-04-15 02:33:10,507 INFO L226 Difference]: Without dead ends: 4744 [2021-04-15 02:33:10,508 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:33:10,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4744 states. [2021-04-15 02:33:10,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4744 to 2823. [2021-04-15 02:33:10,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2823 states, 2822 states have (on average 2.919206236711552) internal successors, (8238), 2822 states have internal predecessors, (8238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:10,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 8238 transitions. [2021-04-15 02:33:10,547 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 8238 transitions. Word has length 21 [2021-04-15 02:33:10,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:10,547 INFO L480 AbstractCegarLoop]: Abstraction has 2823 states and 8238 transitions. [2021-04-15 02:33:10,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:10,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 8238 transitions. [2021-04-15 02:33:10,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:10,549 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:10,549 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:10,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16253 [2021-04-15 02:33:10,749 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:10,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:10,750 INFO L82 PathProgramCache]: Analyzing trace with hash 493771494, now seen corresponding path program 325 times [2021-04-15 02:33:10,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:10,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349756174] [2021-04-15 02:33:10,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:10,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349756174] [2021-04-15 02:33:10,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215370483] [2021-04-15 02:33:10,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:10,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:10,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:10,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:10,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:10,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:33:10,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915536331] [2021-04-15 02:33:10,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:33:10,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:10,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:33:10,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:33:10,889 INFO L87 Difference]: Start difference. First operand 2823 states and 8238 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:11,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:11,062 INFO L93 Difference]: Finished difference Result 3224 states and 9127 transitions. [2021-04-15 02:33:11,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:33:11,063 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:11,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:11,066 INFO L225 Difference]: With dead ends: 3224 [2021-04-15 02:33:11,066 INFO L226 Difference]: Without dead ends: 3214 [2021-04-15 02:33:11,067 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 123.4ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:33:11,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2021-04-15 02:33:11,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 2839. [2021-04-15 02:33:11,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2839 states, 2838 states have (on average 2.9147286821705425) internal successors, (8272), 2838 states have internal predecessors, (8272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:11,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2839 states to 2839 states and 8272 transitions. [2021-04-15 02:33:11,096 INFO L78 Accepts]: Start accepts. Automaton has 2839 states and 8272 transitions. Word has length 21 [2021-04-15 02:33:11,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:11,096 INFO L480 AbstractCegarLoop]: Abstraction has 2839 states and 8272 transitions. [2021-04-15 02:33:11,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:11,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2839 states and 8272 transitions. [2021-04-15 02:33:11,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:11,099 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:11,099 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:11,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16254 [2021-04-15 02:33:11,299 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:11,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:11,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1538987045, now seen corresponding path program 326 times [2021-04-15 02:33:11,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:11,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864229058] [2021-04-15 02:33:11,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:11,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864229058] [2021-04-15 02:33:11,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557873144] [2021-04-15 02:33:11,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:11,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:33:11,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:11,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:11,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:11,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:11,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:33:11,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153148179] [2021-04-15 02:33:11,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:33:11,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:11,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:33:11,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:33:11,426 INFO L87 Difference]: Start difference. First operand 2839 states and 8272 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:11,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:11,652 INFO L93 Difference]: Finished difference Result 5034 states and 14432 transitions. [2021-04-15 02:33:11,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:33:11,653 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:11,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:11,659 INFO L225 Difference]: With dead ends: 5034 [2021-04-15 02:33:11,659 INFO L226 Difference]: Without dead ends: 5034 [2021-04-15 02:33:11,659 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 161.2ms TimeCoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:33:11,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5034 states. [2021-04-15 02:33:11,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5034 to 3008. [2021-04-15 02:33:11,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 2.9514466245427338) internal successors, (8875), 3007 states have internal predecessors, (8875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:11,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8875 transitions. [2021-04-15 02:33:11,700 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8875 transitions. Word has length 21 [2021-04-15 02:33:11,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:11,700 INFO L480 AbstractCegarLoop]: Abstraction has 3008 states and 8875 transitions. [2021-04-15 02:33:11,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:11,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8875 transitions. [2021-04-15 02:33:11,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:11,702 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:11,702 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:11,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16255 [2021-04-15 02:33:11,902 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:11,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:11,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1790273354, now seen corresponding path program 327 times [2021-04-15 02:33:11,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:11,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589392191] [2021-04-15 02:33:11,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:11,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589392191] [2021-04-15 02:33:11,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425740128] [2021-04-15 02:33:11,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:11,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:33:11,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:11,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:11,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:12,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:12,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:33:12,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491094109] [2021-04-15 02:33:12,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:33:12,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:12,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:33:12,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:33:12,038 INFO L87 Difference]: Start difference. First operand 3008 states and 8875 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:12,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:12,206 INFO L93 Difference]: Finished difference Result 3214 states and 9274 transitions. [2021-04-15 02:33:12,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:33:12,207 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:12,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:12,210 INFO L225 Difference]: With dead ends: 3214 [2021-04-15 02:33:12,210 INFO L226 Difference]: Without dead ends: 3204 [2021-04-15 02:33:12,210 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:33:12,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3204 states. [2021-04-15 02:33:12,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3204 to 3008. [2021-04-15 02:33:12,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 2.950116395078151) internal successors, (8871), 3007 states have internal predecessors, (8871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:12,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8871 transitions. [2021-04-15 02:33:12,241 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8871 transitions. Word has length 21 [2021-04-15 02:33:12,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:12,242 INFO L480 AbstractCegarLoop]: Abstraction has 3008 states and 8871 transitions. [2021-04-15 02:33:12,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:12,242 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8871 transitions. [2021-04-15 02:33:12,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:12,244 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:12,244 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:12,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16256 [2021-04-15 02:33:12,444 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:12,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:12,444 INFO L82 PathProgramCache]: Analyzing trace with hash -745057803, now seen corresponding path program 328 times [2021-04-15 02:33:12,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:12,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086116948] [2021-04-15 02:33:12,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:12,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:12,507 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:12,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086116948] [2021-04-15 02:33:12,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942253344] [2021-04-15 02:33:12,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:12,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:33:12,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:12,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:12,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:12,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:12,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:33:12,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995613349] [2021-04-15 02:33:12,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:33:12,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:12,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:33:12,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:33:12,571 INFO L87 Difference]: Start difference. First operand 3008 states and 8871 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:12,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:12,760 INFO L93 Difference]: Finished difference Result 3988 states and 11457 transitions. [2021-04-15 02:33:12,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:33:12,760 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:12,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:12,765 INFO L225 Difference]: With dead ends: 3988 [2021-04-15 02:33:12,765 INFO L226 Difference]: Without dead ends: 3986 [2021-04-15 02:33:12,765 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:33:12,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2021-04-15 02:33:12,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 1933. [2021-04-15 02:33:12,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 2.9073498964803313) internal successors, (5617), 1932 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:12,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 5617 transitions. [2021-04-15 02:33:12,799 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 5617 transitions. Word has length 21 [2021-04-15 02:33:12,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:12,799 INFO L480 AbstractCegarLoop]: Abstraction has 1933 states and 5617 transitions. [2021-04-15 02:33:12,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:12,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 5617 transitions. [2021-04-15 02:33:12,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:12,801 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:12,801 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:13,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16257 [2021-04-15 02:33:13,016 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:13,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:13,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1768772814, now seen corresponding path program 329 times [2021-04-15 02:33:13,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:13,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867162558] [2021-04-15 02:33:13,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:13,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867162558] [2021-04-15 02:33:13,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619192251] [2021-04-15 02:33:13,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:13,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:33:13,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:13,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:13,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:33:13,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:13,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:33:13,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538888426] [2021-04-15 02:33:13,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:33:13,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:13,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:33:13,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:33:13,171 INFO L87 Difference]: Start difference. First operand 1933 states and 5617 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:13,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:13,238 INFO L93 Difference]: Finished difference Result 2184 states and 6076 transitions. [2021-04-15 02:33:13,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:33:13,239 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:13,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:13,241 INFO L225 Difference]: With dead ends: 2184 [2021-04-15 02:33:13,241 INFO L226 Difference]: Without dead ends: 2182 [2021-04-15 02:33:13,241 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:33:13,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2021-04-15 02:33:13,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 1921. [2021-04-15 02:33:13,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 2.9036458333333335) internal successors, (5575), 1920 states have internal predecessors, (5575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:13,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 5575 transitions. [2021-04-15 02:33:13,262 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 5575 transitions. Word has length 21 [2021-04-15 02:33:13,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:13,262 INFO L480 AbstractCegarLoop]: Abstraction has 1921 states and 5575 transitions. [2021-04-15 02:33:13,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:13,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 5575 transitions. [2021-04-15 02:33:13,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:13,264 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:13,264 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:13,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16258 [2021-04-15 02:33:13,465 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:13,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:13,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1749044883, now seen corresponding path program 330 times [2021-04-15 02:33:13,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:13,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623674766] [2021-04-15 02:33:13,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:13,517 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:13,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623674766] [2021-04-15 02:33:13,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013529] [2021-04-15 02:33:13,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:13,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:33:13,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:13,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:13,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:13,583 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:33:13,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:13,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:33:13,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186310065] [2021-04-15 02:33:13,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:33:13,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:13,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:33:13,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:33:13,584 INFO L87 Difference]: Start difference. First operand 1921 states and 5575 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:13,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:13,724 INFO L93 Difference]: Finished difference Result 2090 states and 5850 transitions. [2021-04-15 02:33:13,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:33:13,724 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:13,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:13,727 INFO L225 Difference]: With dead ends: 2090 [2021-04-15 02:33:13,727 INFO L226 Difference]: Without dead ends: 2086 [2021-04-15 02:33:13,727 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:33:13,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-04-15 02:33:13,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1932. [2021-04-15 02:33:13,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 2.9047125841532884) internal successors, (5609), 1931 states have internal predecessors, (5609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:13,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 5609 transitions. [2021-04-15 02:33:13,747 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 5609 transitions. Word has length 21 [2021-04-15 02:33:13,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:13,747 INFO L480 AbstractCegarLoop]: Abstraction has 1932 states and 5609 transitions. [2021-04-15 02:33:13,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:13,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 5609 transitions. [2021-04-15 02:33:13,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:13,749 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:13,749 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:13,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16259,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:13,950 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:13,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:13,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1217034640, now seen corresponding path program 331 times [2021-04-15 02:33:13,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:13,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045226647] [2021-04-15 02:33:13,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:14,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045226647] [2021-04-15 02:33:14,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581609722] [2021-04-15 02:33:14,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:14,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:14,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:14,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:14,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:33:14,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357892993] [2021-04-15 02:33:14,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:33:14,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:14,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:33:14,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:33:14,071 INFO L87 Difference]: Start difference. First operand 1932 states and 5609 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:14,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:14,239 INFO L93 Difference]: Finished difference Result 2179 states and 6040 transitions. [2021-04-15 02:33:14,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:33:14,239 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:14,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:14,241 INFO L225 Difference]: With dead ends: 2179 [2021-04-15 02:33:14,241 INFO L226 Difference]: Without dead ends: 2173 [2021-04-15 02:33:14,241 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:33:14,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2173 states. [2021-04-15 02:33:14,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2173 to 1910. [2021-04-15 02:33:14,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1909 states have (on average 2.900995285489785) internal successors, (5538), 1909 states have internal predecessors, (5538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:14,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 5538 transitions. [2021-04-15 02:33:14,260 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 5538 transitions. Word has length 21 [2021-04-15 02:33:14,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:14,260 INFO L480 AbstractCegarLoop]: Abstraction has 1910 states and 5538 transitions. [2021-04-15 02:33:14,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:14,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 5538 transitions. [2021-04-15 02:33:14,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:14,261 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:14,262 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:14,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16260,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:14,462 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:14,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:14,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1936653967, now seen corresponding path program 332 times [2021-04-15 02:33:14,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:14,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726090647] [2021-04-15 02:33:14,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:14,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726090647] [2021-04-15 02:33:14,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007552826] [2021-04-15 02:33:14,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:14,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:33:14,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:14,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:14,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:14,576 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:14,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:14,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:33:14,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143659616] [2021-04-15 02:33:14,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:33:14,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:14,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:33:14,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:33:14,577 INFO L87 Difference]: Start difference. First operand 1910 states and 5538 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:14,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:14,681 INFO L93 Difference]: Finished difference Result 2223 states and 6180 transitions. [2021-04-15 02:33:14,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:33:14,682 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:14,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:14,684 INFO L225 Difference]: With dead ends: 2223 [2021-04-15 02:33:14,684 INFO L226 Difference]: Without dead ends: 2221 [2021-04-15 02:33:14,684 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:33:14,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2021-04-15 02:33:14,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 1885. [2021-04-15 02:33:14,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 2.8959660297239913) internal successors, (5456), 1884 states have internal predecessors, (5456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 5456 transitions. [2021-04-15 02:33:14,704 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 5456 transitions. Word has length 21 [2021-04-15 02:33:14,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:14,704 INFO L480 AbstractCegarLoop]: Abstraction has 1885 states and 5456 transitions. [2021-04-15 02:33:14,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:14,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 5456 transitions. [2021-04-15 02:33:14,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:14,705 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:14,705 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:14,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16261 [2021-04-15 02:33:14,906 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:14,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:14,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1430307701, now seen corresponding path program 333 times [2021-04-15 02:33:14,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:14,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245367133] [2021-04-15 02:33:14,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:14,973 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:14,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245367133] [2021-04-15 02:33:14,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525160232] [2021-04-15 02:33:14,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:14,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:33:14,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:14,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:14,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:15,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:15,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:33:15,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214162239] [2021-04-15 02:33:15,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:33:15,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:15,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:33:15,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:33:15,041 INFO L87 Difference]: Start difference. First operand 1885 states and 5456 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:15,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:15,131 INFO L93 Difference]: Finished difference Result 2639 states and 7430 transitions. [2021-04-15 02:33:15,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:33:15,132 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:15,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:15,135 INFO L225 Difference]: With dead ends: 2639 [2021-04-15 02:33:15,135 INFO L226 Difference]: Without dead ends: 2639 [2021-04-15 02:33:15,135 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:33:15,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2021-04-15 02:33:15,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2332. [2021-04-15 02:33:15,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2332 states, 2331 states have (on average 2.891033891033891) internal successors, (6739), 2331 states have internal predecessors, (6739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:15,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 6739 transitions. [2021-04-15 02:33:15,162 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 6739 transitions. Word has length 21 [2021-04-15 02:33:15,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:15,162 INFO L480 AbstractCegarLoop]: Abstraction has 2332 states and 6739 transitions. [2021-04-15 02:33:15,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:15,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 6739 transitions. [2021-04-15 02:33:15,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:15,164 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:15,164 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:15,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16262 [2021-04-15 02:33:15,364 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:15,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:15,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1868227088, now seen corresponding path program 334 times [2021-04-15 02:33:15,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:15,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014161409] [2021-04-15 02:33:15,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:15,438 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:15,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014161409] [2021-04-15 02:33:15,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375092084] [2021-04-15 02:33:15,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:15,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:33:15,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:15,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:15,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:15,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:15,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:33:15,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71280458] [2021-04-15 02:33:15,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:33:15,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:15,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:33:15,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:33:15,509 INFO L87 Difference]: Start difference. First operand 2332 states and 6739 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:15,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:15,712 INFO L93 Difference]: Finished difference Result 2899 states and 8005 transitions. [2021-04-15 02:33:15,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:33:15,713 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:15,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:15,716 INFO L225 Difference]: With dead ends: 2899 [2021-04-15 02:33:15,716 INFO L226 Difference]: Without dead ends: 2889 [2021-04-15 02:33:15,716 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:33:15,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2021-04-15 02:33:15,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2339. [2021-04-15 02:33:15,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 2.8896492728828056) internal successors, (6756), 2338 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:15,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 6756 transitions. [2021-04-15 02:33:15,741 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 6756 transitions. Word has length 21 [2021-04-15 02:33:15,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:15,741 INFO L480 AbstractCegarLoop]: Abstraction has 2339 states and 6756 transitions. [2021-04-15 02:33:15,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:15,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 6756 transitions. [2021-04-15 02:33:15,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:15,743 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:15,743 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:15,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16263 [2021-04-15 02:33:15,943 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:15,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:15,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1381524657, now seen corresponding path program 335 times [2021-04-15 02:33:15,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:15,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017274544] [2021-04-15 02:33:15,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:16,011 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:16,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017274544] [2021-04-15 02:33:16,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296898458] [2021-04-15 02:33:16,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:16,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:33:16,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:16,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:16,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:16,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:16,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:33:16,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288756748] [2021-04-15 02:33:16,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:33:16,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:16,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:33:16,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:33:16,078 INFO L87 Difference]: Start difference. First operand 2339 states and 6756 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:16,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:16,237 INFO L93 Difference]: Finished difference Result 2784 states and 7761 transitions. [2021-04-15 02:33:16,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:33:16,237 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:16,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:16,240 INFO L225 Difference]: With dead ends: 2784 [2021-04-15 02:33:16,240 INFO L226 Difference]: Without dead ends: 2784 [2021-04-15 02:33:16,240 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:33:16,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-04-15 02:33:16,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2068. [2021-04-15 02:33:16,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2067 states have (on average 2.864537977745525) internal successors, (5921), 2067 states have internal predecessors, (5921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:16,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 5921 transitions. [2021-04-15 02:33:16,263 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 5921 transitions. Word has length 21 [2021-04-15 02:33:16,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:16,264 INFO L480 AbstractCegarLoop]: Abstraction has 2068 states and 5921 transitions. [2021-04-15 02:33:16,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:16,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 5921 transitions. [2021-04-15 02:33:16,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:16,265 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:16,265 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:16,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16264 [2021-04-15 02:33:16,466 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:16,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:16,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1023255636, now seen corresponding path program 336 times [2021-04-15 02:33:16,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:16,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949367388] [2021-04-15 02:33:16,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:16,545 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:16,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949367388] [2021-04-15 02:33:16,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741024433] [2021-04-15 02:33:16,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:16,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:33:16,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:16,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:16,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:16,611 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:16,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:16,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:33:16,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041966186] [2021-04-15 02:33:16,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:33:16,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:16,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:33:16,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:33:16,611 INFO L87 Difference]: Start difference. First operand 2068 states and 5921 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:16,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:16,741 INFO L93 Difference]: Finished difference Result 2495 states and 6829 transitions. [2021-04-15 02:33:16,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:33:16,742 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:16,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:16,745 INFO L225 Difference]: With dead ends: 2495 [2021-04-15 02:33:16,745 INFO L226 Difference]: Without dead ends: 2483 [2021-04-15 02:33:16,745 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:33:16,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2021-04-15 02:33:16,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 2068. [2021-04-15 02:33:16,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2067 states have (on average 2.864054184808902) internal successors, (5920), 2067 states have internal predecessors, (5920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:16,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 5920 transitions. [2021-04-15 02:33:16,767 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 5920 transitions. Word has length 21 [2021-04-15 02:33:16,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:16,768 INFO L480 AbstractCegarLoop]: Abstraction has 2068 states and 5920 transitions. [2021-04-15 02:33:16,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:16,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 5920 transitions. [2021-04-15 02:33:16,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:16,769 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:16,769 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:16,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16265 [2021-04-15 02:33:16,972 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:16,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:16,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1645985461, now seen corresponding path program 337 times [2021-04-15 02:33:16,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:16,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187557300] [2021-04-15 02:33:16,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:17,056 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:17,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187557300] [2021-04-15 02:33:17,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667744843] [2021-04-15 02:33:17,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:17,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:17,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:17,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:17,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:33:17,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262244475] [2021-04-15 02:33:17,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:33:17,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:17,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:33:17,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:33:17,117 INFO L87 Difference]: Start difference. First operand 2068 states and 5920 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:17,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:17,346 INFO L93 Difference]: Finished difference Result 3237 states and 8989 transitions. [2021-04-15 02:33:17,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:33:17,347 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:17,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:17,351 INFO L225 Difference]: With dead ends: 3237 [2021-04-15 02:33:17,351 INFO L226 Difference]: Without dead ends: 3237 [2021-04-15 02:33:17,351 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 199.5ms TimeCoverageRelationStatistics Valid=294, Invalid=576, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:33:17,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3237 states. [2021-04-15 02:33:17,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3237 to 2165. [2021-04-15 02:33:17,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2165 states, 2164 states have (on average 2.863678373382625) internal successors, (6197), 2164 states have internal predecessors, (6197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:17,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 6197 transitions. [2021-04-15 02:33:17,376 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 6197 transitions. Word has length 21 [2021-04-15 02:33:17,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:17,376 INFO L480 AbstractCegarLoop]: Abstraction has 2165 states and 6197 transitions. [2021-04-15 02:33:17,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:17,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 6197 transitions. [2021-04-15 02:33:17,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:17,378 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:17,378 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:17,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16266,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:17,578 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:17,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:17,579 INFO L82 PathProgramCache]: Analyzing trace with hash 94608648, now seen corresponding path program 338 times [2021-04-15 02:33:17,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:17,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912319642] [2021-04-15 02:33:17,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:17,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912319642] [2021-04-15 02:33:17,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633367592] [2021-04-15 02:33:17,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:17,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:33:17,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:17,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:17,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:17,709 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:17,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:17,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:33:17,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728870624] [2021-04-15 02:33:17,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:33:17,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:17,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:33:17,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:33:17,710 INFO L87 Difference]: Start difference. First operand 2165 states and 6197 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:17,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:17,842 INFO L93 Difference]: Finished difference Result 2340 states and 6503 transitions. [2021-04-15 02:33:17,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:33:17,843 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:17,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:17,845 INFO L225 Difference]: With dead ends: 2340 [2021-04-15 02:33:17,845 INFO L226 Difference]: Without dead ends: 2336 [2021-04-15 02:33:17,846 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:33:17,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-04-15 02:33:17,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2135. [2021-04-15 02:33:17,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 2.8533270852858483) internal successors, (6089), 2134 states have internal predecessors, (6089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:17,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 6089 transitions. [2021-04-15 02:33:17,867 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 6089 transitions. Word has length 21 [2021-04-15 02:33:17,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:17,867 INFO L480 AbstractCegarLoop]: Abstraction has 2135 states and 6089 transitions. [2021-04-15 02:33:17,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:17,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 6089 transitions. [2021-04-15 02:33:17,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:17,868 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:17,868 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:18,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16267 [2021-04-15 02:33:18,069 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:18,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:18,069 INFO L82 PathProgramCache]: Analyzing trace with hash 578153513, now seen corresponding path program 339 times [2021-04-15 02:33:18,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:18,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570993838] [2021-04-15 02:33:18,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:18,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570993838] [2021-04-15 02:33:18,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363335190] [2021-04-15 02:33:18,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:18,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:33:18,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:18,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:18,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:18,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:18,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:33:18,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545239872] [2021-04-15 02:33:18,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:33:18,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:18,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:33:18,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:33:18,191 INFO L87 Difference]: Start difference. First operand 2135 states and 6089 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:18,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:18,409 INFO L93 Difference]: Finished difference Result 2321 states and 6379 transitions. [2021-04-15 02:33:18,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:33:18,411 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:18,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:18,414 INFO L225 Difference]: With dead ends: 2321 [2021-04-15 02:33:18,414 INFO L226 Difference]: Without dead ends: 2315 [2021-04-15 02:33:18,414 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:33:18,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2021-04-15 02:33:18,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2135. [2021-04-15 02:33:18,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 2.8509840674789126) internal successors, (6084), 2134 states have internal predecessors, (6084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:18,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 6084 transitions. [2021-04-15 02:33:18,435 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 6084 transitions. Word has length 21 [2021-04-15 02:33:18,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:18,436 INFO L480 AbstractCegarLoop]: Abstraction has 2135 states and 6084 transitions. [2021-04-15 02:33:18,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:18,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 6084 transitions. [2021-04-15 02:33:18,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:18,437 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:18,437 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:18,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16268,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:18,638 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:18,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:18,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1541604198, now seen corresponding path program 340 times [2021-04-15 02:33:18,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:18,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133339632] [2021-04-15 02:33:18,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:18,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133339632] [2021-04-15 02:33:18,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344753961] [2021-04-15 02:33:18,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:18,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:33:18,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:18,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:18,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:18,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:18,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:33:18,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461550146] [2021-04-15 02:33:18,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:33:18,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:18,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:33:18,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:33:18,763 INFO L87 Difference]: Start difference. First operand 2135 states and 6084 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:18,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:18,930 INFO L93 Difference]: Finished difference Result 2405 states and 6657 transitions. [2021-04-15 02:33:18,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:33:18,931 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:18,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:18,933 INFO L225 Difference]: With dead ends: 2405 [2021-04-15 02:33:18,933 INFO L226 Difference]: Without dead ends: 2395 [2021-04-15 02:33:18,933 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:33:18,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-04-15 02:33:18,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 2157. [2021-04-15 02:33:18,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2157 states, 2156 states have (on average 2.8501855287569575) internal successors, (6145), 2156 states have internal predecessors, (6145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:18,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 6145 transitions. [2021-04-15 02:33:18,956 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 6145 transitions. Word has length 21 [2021-04-15 02:33:18,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:18,956 INFO L480 AbstractCegarLoop]: Abstraction has 2157 states and 6145 transitions. [2021-04-15 02:33:18,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:18,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 6145 transitions. [2021-04-15 02:33:18,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:18,958 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:18,958 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:19,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16269 [2021-04-15 02:33:19,158 INFO L428 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:19,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:19,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1708147547, now seen corresponding path program 341 times [2021-04-15 02:33:19,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:19,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068147617] [2021-04-15 02:33:19,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:19,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068147617] [2021-04-15 02:33:19,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820434010] [2021-04-15 02:33:19,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:19,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:33:19,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:19,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:19,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:19,297 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:19,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:19,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:33:19,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705953458] [2021-04-15 02:33:19,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:33:19,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:19,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:33:19,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:33:19,297 INFO L87 Difference]: Start difference. First operand 2157 states and 6145 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:19,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:19,457 INFO L93 Difference]: Finished difference Result 2688 states and 7467 transitions. [2021-04-15 02:33:19,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:33:19,457 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:19,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:19,460 INFO L225 Difference]: With dead ends: 2688 [2021-04-15 02:33:19,460 INFO L226 Difference]: Without dead ends: 2686 [2021-04-15 02:33:19,460 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:33:19,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-04-15 02:33:19,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 1554. [2021-04-15 02:33:19,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1553 states have (on average 2.8126207340631035) internal successors, (4368), 1553 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 4368 transitions. [2021-04-15 02:33:19,478 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 4368 transitions. Word has length 21 [2021-04-15 02:33:19,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:19,479 INFO L480 AbstractCegarLoop]: Abstraction has 1554 states and 4368 transitions. [2021-04-15 02:33:19,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:19,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 4368 transitions. [2021-04-15 02:33:19,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:19,480 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:19,480 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:19,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16270,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:19,680 INFO L428 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:19,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:19,681 INFO L82 PathProgramCache]: Analyzing trace with hash 696632746, now seen corresponding path program 342 times [2021-04-15 02:33:19,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:19,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200205868] [2021-04-15 02:33:19,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:19,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200205868] [2021-04-15 02:33:19,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273145554] [2021-04-15 02:33:19,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:19,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:33:19,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:19,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:19,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:19,820 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:19,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:19,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:33:19,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234730166] [2021-04-15 02:33:19,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:33:19,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:19,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:33:19,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:33:19,820 INFO L87 Difference]: Start difference. First operand 1554 states and 4368 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:19,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:19,964 INFO L93 Difference]: Finished difference Result 1983 states and 5292 transitions. [2021-04-15 02:33:19,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:33:19,965 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:19,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:19,967 INFO L225 Difference]: With dead ends: 1983 [2021-04-15 02:33:19,967 INFO L226 Difference]: Without dead ends: 1971 [2021-04-15 02:33:19,967 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:33:19,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-04-15 02:33:19,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1554. [2021-04-15 02:33:19,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1553 states have (on average 2.8106889890534448) internal successors, (4365), 1553 states have internal predecessors, (4365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:19,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 4365 transitions. [2021-04-15 02:33:19,983 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 4365 transitions. Word has length 21 [2021-04-15 02:33:19,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:19,983 INFO L480 AbstractCegarLoop]: Abstraction has 1554 states and 4365 transitions. [2021-04-15 02:33:19,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:19,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 4365 transitions. [2021-04-15 02:33:19,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:19,984 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:19,984 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:20,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16271 [2021-04-15 02:33:20,185 INFO L428 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:20,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:20,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1319362571, now seen corresponding path program 343 times [2021-04-15 02:33:20,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:20,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837984951] [2021-04-15 02:33:20,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:20,261 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:20,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837984951] [2021-04-15 02:33:20,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328337084] [2021-04-15 02:33:20,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:20,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:20,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:20,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:20,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:33:20,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348048455] [2021-04-15 02:33:20,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:33:20,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:20,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:33:20,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:33:20,327 INFO L87 Difference]: Start difference. First operand 1554 states and 4365 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:20,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:20,596 INFO L93 Difference]: Finished difference Result 2612 states and 7115 transitions. [2021-04-15 02:33:20,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:33:20,597 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:20,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:20,600 INFO L225 Difference]: With dead ends: 2612 [2021-04-15 02:33:20,600 INFO L226 Difference]: Without dead ends: 2612 [2021-04-15 02:33:20,600 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 223.6ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:33:20,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-04-15 02:33:20,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 1490. [2021-04-15 02:33:20,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1489 states have (on average 2.8280725319006046) internal successors, (4211), 1489 states have internal predecessors, (4211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 4211 transitions. [2021-04-15 02:33:20,618 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 4211 transitions. Word has length 21 [2021-04-15 02:33:20,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:20,618 INFO L480 AbstractCegarLoop]: Abstraction has 1490 states and 4211 transitions. [2021-04-15 02:33:20,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:20,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 4211 transitions. [2021-04-15 02:33:20,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:20,620 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:20,620 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:20,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16272,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:20,820 INFO L428 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:20,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:20,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1179807206, now seen corresponding path program 344 times [2021-04-15 02:33:20,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:20,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232695234] [2021-04-15 02:33:20,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:20,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232695234] [2021-04-15 02:33:20,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299558853] [2021-04-15 02:33:20,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:20,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:33:20,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:20,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:20,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:20,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:20,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:33:20,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874120734] [2021-04-15 02:33:20,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:33:20,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:20,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:33:20,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:33:20,953 INFO L87 Difference]: Start difference. First operand 1490 states and 4211 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:21,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:21,059 INFO L93 Difference]: Finished difference Result 1712 states and 4615 transitions. [2021-04-15 02:33:21,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:33:21,059 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:21,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:21,061 INFO L225 Difference]: With dead ends: 1712 [2021-04-15 02:33:21,061 INFO L226 Difference]: Without dead ends: 1712 [2021-04-15 02:33:21,062 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:33:21,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-04-15 02:33:21,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1470. [2021-04-15 02:33:21,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 2.821647379169503) internal successors, (4145), 1469 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 4145 transitions. [2021-04-15 02:33:21,077 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 4145 transitions. Word has length 21 [2021-04-15 02:33:21,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:21,077 INFO L480 AbstractCegarLoop]: Abstraction has 1470 states and 4145 transitions. [2021-04-15 02:33:21,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:21,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 4145 transitions. [2021-04-15 02:33:21,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:21,078 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:21,078 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:21,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16273,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:21,279 INFO L428 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:21,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:21,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1436993883, now seen corresponding path program 345 times [2021-04-15 02:33:21,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:21,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722993506] [2021-04-15 02:33:21,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:21,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:21,331 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:21,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722993506] [2021-04-15 02:33:21,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934540424] [2021-04-15 02:33:21,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:21,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:33:21,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:21,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:21,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:21,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:21,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:33:21,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468686479] [2021-04-15 02:33:21,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:33:21,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:21,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:33:21,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:33:21,397 INFO L87 Difference]: Start difference. First operand 1470 states and 4145 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:21,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:21,564 INFO L93 Difference]: Finished difference Result 1612 states and 4366 transitions. [2021-04-15 02:33:21,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:33:21,564 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:21,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:21,566 INFO L225 Difference]: With dead ends: 1612 [2021-04-15 02:33:21,566 INFO L226 Difference]: Without dead ends: 1608 [2021-04-15 02:33:21,566 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:33:21,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-04-15 02:33:21,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1454. [2021-04-15 02:33:21,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1453 states have (on average 2.8183069511355816) internal successors, (4095), 1453 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:21,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 4095 transitions. [2021-04-15 02:33:21,580 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 4095 transitions. Word has length 21 [2021-04-15 02:33:21,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:21,580 INFO L480 AbstractCegarLoop]: Abstraction has 1454 states and 4095 transitions. [2021-04-15 02:33:21,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:21,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 4095 transitions. [2021-04-15 02:33:21,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:21,582 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:21,582 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:21,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16274 [2021-04-15 02:33:21,782 INFO L428 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:21,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:21,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1062657916, now seen corresponding path program 346 times [2021-04-15 02:33:21,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:21,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793078959] [2021-04-15 02:33:21,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:21,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:21,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793078959] [2021-04-15 02:33:21,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332485796] [2021-04-15 02:33:21,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:21,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:33:21,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:21,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:21,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:21,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:21,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:33:21,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534277615] [2021-04-15 02:33:21,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:33:21,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:21,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:33:21,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:33:21,931 INFO L87 Difference]: Start difference. First operand 1454 states and 4095 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:22,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:22,141 INFO L93 Difference]: Finished difference Result 1781 states and 4786 transitions. [2021-04-15 02:33:22,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:33:22,142 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:22,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:22,144 INFO L225 Difference]: With dead ends: 1781 [2021-04-15 02:33:22,144 INFO L226 Difference]: Without dead ends: 1769 [2021-04-15 02:33:22,144 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 158.1ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:33:22,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2021-04-15 02:33:22,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1460. [2021-04-15 02:33:22,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 2.8115147361206305) internal successors, (4102), 1459 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:22,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 4102 transitions. [2021-04-15 02:33:22,159 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 4102 transitions. Word has length 21 [2021-04-15 02:33:22,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:22,159 INFO L480 AbstractCegarLoop]: Abstraction has 1460 states and 4102 transitions. [2021-04-15 02:33:22,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:22,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 4102 transitions. [2021-04-15 02:33:22,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:22,160 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:22,160 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:22,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16275 [2021-04-15 02:33:22,361 INFO L428 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:22,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:22,361 INFO L82 PathProgramCache]: Analyzing trace with hash -439928091, now seen corresponding path program 347 times [2021-04-15 02:33:22,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:22,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094643604] [2021-04-15 02:33:22,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:22,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094643604] [2021-04-15 02:33:22,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917322498] [2021-04-15 02:33:22,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:22,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:33:22,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:22,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:22,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:22,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:22,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:33:22,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525872628] [2021-04-15 02:33:22,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:33:22,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:22,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:33:22,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:33:22,524 INFO L87 Difference]: Start difference. First operand 1460 states and 4102 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:22,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:22,752 INFO L93 Difference]: Finished difference Result 1843 states and 4934 transitions. [2021-04-15 02:33:22,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:33:22,752 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:22,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:22,754 INFO L225 Difference]: With dead ends: 1843 [2021-04-15 02:33:22,754 INFO L226 Difference]: Without dead ends: 1839 [2021-04-15 02:33:22,754 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 207.9ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:33:22,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2021-04-15 02:33:22,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1157. [2021-04-15 02:33:22,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.7889273356401385) internal successors, (3224), 1156 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:22,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3224 transitions. [2021-04-15 02:33:22,767 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3224 transitions. Word has length 21 [2021-04-15 02:33:22,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:22,767 INFO L480 AbstractCegarLoop]: Abstraction has 1157 states and 3224 transitions. [2021-04-15 02:33:22,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:22,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3224 transitions. [2021-04-15 02:33:22,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:22,768 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:22,768 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:22,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16276,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:22,968 INFO L428 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:22,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:22,968 INFO L82 PathProgramCache]: Analyzing trace with hash -2110322360, now seen corresponding path program 348 times [2021-04-15 02:33:22,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:22,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731034868] [2021-04-15 02:33:22,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:23,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731034868] [2021-04-15 02:33:23,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412964276] [2021-04-15 02:33:23,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:23,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:33:23,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:23,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:23,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:23,092 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:23,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:23,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:33:23,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935942047] [2021-04-15 02:33:23,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:33:23,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:23,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:33:23,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:33:23,092 INFO L87 Difference]: Start difference. First operand 1157 states and 3224 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:23,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:23,172 INFO L93 Difference]: Finished difference Result 1482 states and 3827 transitions. [2021-04-15 02:33:23,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:33:23,172 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:23,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:23,174 INFO L225 Difference]: With dead ends: 1482 [2021-04-15 02:33:23,174 INFO L226 Difference]: Without dead ends: 1482 [2021-04-15 02:33:23,174 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:33:23,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-04-15 02:33:23,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1173. [2021-04-15 02:33:23,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 2.803754266211604) internal successors, (3286), 1172 states have internal predecessors, (3286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:23,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3286 transitions. [2021-04-15 02:33:23,186 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3286 transitions. Word has length 21 [2021-04-15 02:33:23,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:23,186 INFO L480 AbstractCegarLoop]: Abstraction has 1173 states and 3286 transitions. [2021-04-15 02:33:23,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:23,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3286 transitions. [2021-04-15 02:33:23,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:23,187 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:23,187 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:23,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16277 [2021-04-15 02:33:23,397 INFO L428 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:23,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:23,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1407495337, now seen corresponding path program 349 times [2021-04-15 02:33:23,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:23,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175960321] [2021-04-15 02:33:23,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:23,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175960321] [2021-04-15 02:33:23,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029138283] [2021-04-15 02:33:23,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:23,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:23,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:23,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:23,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:33:23,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518585114] [2021-04-15 02:33:23,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:33:23,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:23,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:33:23,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:33:23,512 INFO L87 Difference]: Start difference. First operand 1173 states and 3286 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:23,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:23,665 INFO L93 Difference]: Finished difference Result 1332 states and 3551 transitions. [2021-04-15 02:33:23,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:33:23,665 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:23,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:23,667 INFO L225 Difference]: With dead ends: 1332 [2021-04-15 02:33:23,667 INFO L226 Difference]: Without dead ends: 1330 [2021-04-15 02:33:23,667 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:33:23,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2021-04-15 02:33:23,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 1184. [2021-04-15 02:33:23,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 2.808114961961116) internal successors, (3322), 1183 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:23,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 3322 transitions. [2021-04-15 02:33:23,678 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 3322 transitions. Word has length 21 [2021-04-15 02:33:23,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:23,678 INFO L480 AbstractCegarLoop]: Abstraction has 1184 states and 3322 transitions. [2021-04-15 02:33:23,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:23,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 3322 transitions. [2021-04-15 02:33:23,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:23,679 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:23,679 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:23,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16278,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:23,881 INFO L428 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:23,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:23,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1948570474, now seen corresponding path program 350 times [2021-04-15 02:33:23,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:23,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581370458] [2021-04-15 02:33:23,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:23,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581370458] [2021-04-15 02:33:23,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942224907] [2021-04-15 02:33:23,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:23,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:33:23,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:23,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:23,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:24,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:24,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:33:24,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373298905] [2021-04-15 02:33:24,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:33:24,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:24,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:33:24,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:33:24,012 INFO L87 Difference]: Start difference. First operand 1184 states and 3322 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:24,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:24,174 INFO L93 Difference]: Finished difference Result 1469 states and 3818 transitions. [2021-04-15 02:33:24,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:33:24,175 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:24,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:24,176 INFO L225 Difference]: With dead ends: 1469 [2021-04-15 02:33:24,176 INFO L226 Difference]: Without dead ends: 1463 [2021-04-15 02:33:24,176 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:33:24,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-04-15 02:33:24,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1184. [2021-04-15 02:33:24,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 2.804733727810651) internal successors, (3318), 1183 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:24,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 3318 transitions. [2021-04-15 02:33:24,188 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 3318 transitions. Word has length 21 [2021-04-15 02:33:24,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:24,188 INFO L480 AbstractCegarLoop]: Abstraction has 1184 states and 3318 transitions. [2021-04-15 02:33:24,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:24,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 3318 transitions. [2021-04-15 02:33:24,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:24,189 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:24,189 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:24,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16279 [2021-04-15 02:33:24,389 INFO L428 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:24,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:24,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1057248843, now seen corresponding path program 351 times [2021-04-15 02:33:24,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:24,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596985387] [2021-04-15 02:33:24,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:24,444 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:24,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596985387] [2021-04-15 02:33:24,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560697586] [2021-04-15 02:33:24,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:24,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:33:24,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:24,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:24,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:24,514 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:24,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:24,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:33:24,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564124714] [2021-04-15 02:33:24,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:33:24,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:24,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:33:24,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:33:24,515 INFO L87 Difference]: Start difference. First operand 1184 states and 3318 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:24,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:24,645 INFO L93 Difference]: Finished difference Result 1448 states and 3844 transitions. [2021-04-15 02:33:24,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:33:24,646 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:24,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:24,647 INFO L225 Difference]: With dead ends: 1448 [2021-04-15 02:33:24,647 INFO L226 Difference]: Without dead ends: 1448 [2021-04-15 02:33:24,647 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:33:24,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2021-04-15 02:33:24,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1157. [2021-04-15 02:33:24,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.7949826989619377) internal successors, (3231), 1156 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:24,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3231 transitions. [2021-04-15 02:33:24,658 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3231 transitions. Word has length 21 [2021-04-15 02:33:24,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:24,658 INFO L480 AbstractCegarLoop]: Abstraction has 1157 states and 3231 transitions. [2021-04-15 02:33:24,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:24,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3231 transitions. [2021-04-15 02:33:24,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:24,659 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:24,659 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:24,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16280,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:24,860 INFO L428 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:24,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:24,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1969576682, now seen corresponding path program 352 times [2021-04-15 02:33:24,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:24,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531015716] [2021-04-15 02:33:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:24,929 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:24,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531015716] [2021-04-15 02:33:24,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615234552] [2021-04-15 02:33:24,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:24,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:33:24,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:24,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:24,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:25,003 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:25,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:25,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:33:25,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784204537] [2021-04-15 02:33:25,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:33:25,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:25,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:33:25,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:33:25,004 INFO L87 Difference]: Start difference. First operand 1157 states and 3231 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:25,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:25,221 INFO L93 Difference]: Finished difference Result 1462 states and 3767 transitions. [2021-04-15 02:33:25,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:33:25,222 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:25,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:25,223 INFO L225 Difference]: With dead ends: 1462 [2021-04-15 02:33:25,223 INFO L226 Difference]: Without dead ends: 1454 [2021-04-15 02:33:25,223 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:33:25,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-04-15 02:33:25,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1157. [2021-04-15 02:33:25,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.7932525951557095) internal successors, (3229), 1156 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:25,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3229 transitions. [2021-04-15 02:33:25,241 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3229 transitions. Word has length 21 [2021-04-15 02:33:25,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:25,241 INFO L480 AbstractCegarLoop]: Abstraction has 1157 states and 3229 transitions. [2021-04-15 02:33:25,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:25,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3229 transitions. [2021-04-15 02:33:25,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:25,242 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:25,242 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:25,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16281 [2021-04-15 02:33:25,443 INFO L428 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:25,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:25,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1088758155, now seen corresponding path program 353 times [2021-04-15 02:33:25,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:25,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516005873] [2021-04-15 02:33:25,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:25,508 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:25,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516005873] [2021-04-15 02:33:25,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274468170] [2021-04-15 02:33:25,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:25,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:33:25,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:25,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:25,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:25,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:25,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:33:25,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389081957] [2021-04-15 02:33:25,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:33:25,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:25,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:33:25,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:33:25,585 INFO L87 Difference]: Start difference. First operand 1157 states and 3229 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:25,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:25,717 INFO L93 Difference]: Finished difference Result 1409 states and 3711 transitions. [2021-04-15 02:33:25,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:33:25,717 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:25,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:25,719 INFO L225 Difference]: With dead ends: 1409 [2021-04-15 02:33:25,719 INFO L226 Difference]: Without dead ends: 1405 [2021-04-15 02:33:25,719 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 124.3ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:33:25,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-04-15 02:33:25,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1044. [2021-04-15 02:33:25,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 2.771812080536913) internal successors, (2891), 1043 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:25,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 2891 transitions. [2021-04-15 02:33:25,729 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 2891 transitions. Word has length 21 [2021-04-15 02:33:25,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:25,730 INFO L480 AbstractCegarLoop]: Abstraction has 1044 states and 2891 transitions. [2021-04-15 02:33:25,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:25,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 2891 transitions. [2021-04-15 02:33:25,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:25,730 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:25,730 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:25,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16282,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:25,931 INFO L428 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:25,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:25,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1723074203, now seen corresponding path program 354 times [2021-04-15 02:33:25,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:25,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663083455] [2021-04-15 02:33:25,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:25,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663083455] [2021-04-15 02:33:25,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649904700] [2021-04-15 02:33:25,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:26,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:33:26,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:26,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:26,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:26,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:26,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:33:26,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219124913] [2021-04-15 02:33:26,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:33:26,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:26,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:33:26,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:33:26,082 INFO L87 Difference]: Start difference. First operand 1044 states and 2891 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:26,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:26,204 INFO L93 Difference]: Finished difference Result 1522 states and 3994 transitions. [2021-04-15 02:33:26,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:33:26,205 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:26,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:26,206 INFO L225 Difference]: With dead ends: 1522 [2021-04-15 02:33:26,206 INFO L226 Difference]: Without dead ends: 1522 [2021-04-15 02:33:26,206 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:33:26,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2021-04-15 02:33:26,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1262. [2021-04-15 02:33:26,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 2.7731958762886597) internal successors, (3497), 1261 states have internal predecessors, (3497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:26,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 3497 transitions. [2021-04-15 02:33:26,218 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 3497 transitions. Word has length 21 [2021-04-15 02:33:26,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:26,218 INFO L480 AbstractCegarLoop]: Abstraction has 1262 states and 3497 transitions. [2021-04-15 02:33:26,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:26,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 3497 transitions. [2021-04-15 02:33:26,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:26,220 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:26,220 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:26,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16283 [2021-04-15 02:33:26,420 INFO L428 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:26,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:26,420 INFO L82 PathProgramCache]: Analyzing trace with hash 681706090, now seen corresponding path program 355 times [2021-04-15 02:33:26,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:26,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428342612] [2021-04-15 02:33:26,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:26,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428342612] [2021-04-15 02:33:26,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376349972] [2021-04-15 02:33:26,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:26,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:26,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:26,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:26,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:33:26,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929444262] [2021-04-15 02:33:26,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:33:26,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:26,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:33:26,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:33:26,572 INFO L87 Difference]: Start difference. First operand 1262 states and 3497 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:26,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:26,777 INFO L93 Difference]: Finished difference Result 2034 states and 5233 transitions. [2021-04-15 02:33:26,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:33:26,778 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:26,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:26,780 INFO L225 Difference]: With dead ends: 2034 [2021-04-15 02:33:26,780 INFO L226 Difference]: Without dead ends: 2022 [2021-04-15 02:33:26,780 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 173.6ms TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:33:26,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-04-15 02:33:26,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1292. [2021-04-15 02:33:26,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 2.7683965917893105) internal successors, (3574), 1291 states have internal predecessors, (3574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:26,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 3574 transitions. [2021-04-15 02:33:26,794 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 3574 transitions. Word has length 21 [2021-04-15 02:33:26,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:26,794 INFO L480 AbstractCegarLoop]: Abstraction has 1292 states and 3574 transitions. [2021-04-15 02:33:26,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:26,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 3574 transitions. [2021-04-15 02:33:26,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:26,795 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:26,795 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:26,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16284,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:26,995 INFO L428 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:26,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:26,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1304435915, now seen corresponding path program 356 times [2021-04-15 02:33:26,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:26,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556100141] [2021-04-15 02:33:26,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:27,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556100141] [2021-04-15 02:33:27,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873015074] [2021-04-15 02:33:27,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:27,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:33:27,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:27,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:27,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:27,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:27,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:33:27,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773908015] [2021-04-15 02:33:27,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:33:27,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:27,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:33:27,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:33:27,150 INFO L87 Difference]: Start difference. First operand 1292 states and 3574 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:27,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:27,358 INFO L93 Difference]: Finished difference Result 1611 states and 4182 transitions. [2021-04-15 02:33:27,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:33:27,359 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:27,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:27,361 INFO L225 Difference]: With dead ends: 1611 [2021-04-15 02:33:27,361 INFO L226 Difference]: Without dead ends: 1611 [2021-04-15 02:33:27,361 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 183.9ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:33:27,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-04-15 02:33:27,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1257. [2021-04-15 02:33:27,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 2.7619426751592355) internal successors, (3469), 1256 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:27,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 3469 transitions. [2021-04-15 02:33:27,373 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 3469 transitions. Word has length 21 [2021-04-15 02:33:27,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:27,373 INFO L480 AbstractCegarLoop]: Abstraction has 1257 states and 3469 transitions. [2021-04-15 02:33:27,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:27,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 3469 transitions. [2021-04-15 02:33:27,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:27,374 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:27,374 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:27,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16285 [2021-04-15 02:33:27,575 INFO L428 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:27,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:27,575 INFO L82 PathProgramCache]: Analyzing trace with hash 257394854, now seen corresponding path program 357 times [2021-04-15 02:33:27,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:27,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529479244] [2021-04-15 02:33:27,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:27,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529479244] [2021-04-15 02:33:27,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627524769] [2021-04-15 02:33:27,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:27,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:33:27,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:27,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:27,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:27,734 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:27,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:27,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:33:27,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381009093] [2021-04-15 02:33:27,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:33:27,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:27,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:33:27,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:33:27,735 INFO L87 Difference]: Start difference. First operand 1257 states and 3469 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:27,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:27,885 INFO L93 Difference]: Finished difference Result 1884 states and 4813 transitions. [2021-04-15 02:33:27,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:33:27,886 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:27,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:27,888 INFO L225 Difference]: With dead ends: 1884 [2021-04-15 02:33:27,888 INFO L226 Difference]: Without dead ends: 1870 [2021-04-15 02:33:27,888 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:33:27,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2021-04-15 02:33:27,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1262. [2021-04-15 02:33:27,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 2.7573354480570975) internal successors, (3477), 1261 states have internal predecessors, (3477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:27,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 3477 transitions. [2021-04-15 02:33:27,901 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 3477 transitions. Word has length 21 [2021-04-15 02:33:27,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:27,901 INFO L480 AbstractCegarLoop]: Abstraction has 1262 states and 3477 transitions. [2021-04-15 02:33:27,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:27,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 3477 transitions. [2021-04-15 02:33:27,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:27,902 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:27,902 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:28,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16286,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:28,102 INFO L428 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:28,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:28,102 INFO L82 PathProgramCache]: Analyzing trace with hash 667969061, now seen corresponding path program 358 times [2021-04-15 02:33:28,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:28,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931295308] [2021-04-15 02:33:28,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:28,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931295308] [2021-04-15 02:33:28,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427946956] [2021-04-15 02:33:28,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:28,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:33:28,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:28,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:28,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:28,249 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:28,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:28,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:33:28,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654146267] [2021-04-15 02:33:28,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:33:28,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:28,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:33:28,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:33:28,250 INFO L87 Difference]: Start difference. First operand 1262 states and 3477 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:28,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:28,556 INFO L93 Difference]: Finished difference Result 1832 states and 4763 transitions. [2021-04-15 02:33:28,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:33:28,557 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:28,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:28,559 INFO L225 Difference]: With dead ends: 1832 [2021-04-15 02:33:28,559 INFO L226 Difference]: Without dead ends: 1832 [2021-04-15 02:33:28,559 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 249.4ms TimeCoverageRelationStatistics Valid=376, Invalid=746, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:33:28,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-04-15 02:33:28,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1349. [2021-04-15 02:33:28,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 2.770771513353116) internal successors, (3735), 1348 states have internal predecessors, (3735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:28,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 3735 transitions. [2021-04-15 02:33:28,573 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 3735 transitions. Word has length 21 [2021-04-15 02:33:28,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:28,573 INFO L480 AbstractCegarLoop]: Abstraction has 1349 states and 3735 transitions. [2021-04-15 02:33:28,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:28,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 3735 transitions. [2021-04-15 02:33:28,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:28,574 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:28,574 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:28,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16287 [2021-04-15 02:33:28,775 INFO L428 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:28,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:28,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1440766350, now seen corresponding path program 359 times [2021-04-15 02:33:28,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:28,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435080710] [2021-04-15 02:33:28,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:28,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:28,853 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:28,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435080710] [2021-04-15 02:33:28,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521160295] [2021-04-15 02:33:28,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:28,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:33:28,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:28,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:28,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:28,918 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:28,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:28,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:33:28,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837090424] [2021-04-15 02:33:28,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:33:28,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:28,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:33:28,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:33:28,919 INFO L87 Difference]: Start difference. First operand 1349 states and 3735 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:29,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:29,077 INFO L93 Difference]: Finished difference Result 1621 states and 4225 transitions. [2021-04-15 02:33:29,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:33:29,077 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:29,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:29,079 INFO L225 Difference]: With dead ends: 1621 [2021-04-15 02:33:29,079 INFO L226 Difference]: Without dead ends: 1617 [2021-04-15 02:33:29,079 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:33:29,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-04-15 02:33:29,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1383. [2021-04-15 02:33:29,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 2.7836468885672936) internal successors, (3847), 1382 states have internal predecessors, (3847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:29,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 3847 transitions. [2021-04-15 02:33:29,092 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 3847 transitions. Word has length 21 [2021-04-15 02:33:29,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:29,092 INFO L480 AbstractCegarLoop]: Abstraction has 1383 states and 3847 transitions. [2021-04-15 02:33:29,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:29,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 3847 transitions. [2021-04-15 02:33:29,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:29,093 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:29,093 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:29,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16288 [2021-04-15 02:33:29,294 INFO L428 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:29,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:29,294 INFO L82 PathProgramCache]: Analyzing trace with hash -957221485, now seen corresponding path program 360 times [2021-04-15 02:33:29,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:29,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881381345] [2021-04-15 02:33:29,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:29,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881381345] [2021-04-15 02:33:29,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828056905] [2021-04-15 02:33:29,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:29,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:33:29,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:29,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:29,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:29,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:29,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:33:29,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114917879] [2021-04-15 02:33:29,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:33:29,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:29,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:33:29,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:33:29,437 INFO L87 Difference]: Start difference. First operand 1383 states and 3847 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:29,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:29,696 INFO L93 Difference]: Finished difference Result 1662 states and 4335 transitions. [2021-04-15 02:33:29,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:33:29,697 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:29,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:29,698 INFO L225 Difference]: With dead ends: 1662 [2021-04-15 02:33:29,698 INFO L226 Difference]: Without dead ends: 1656 [2021-04-15 02:33:29,699 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 189.4ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:33:29,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-04-15 02:33:29,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1398. [2021-04-15 02:33:29,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.7931281317108088) internal successors, (3902), 1397 states have internal predecessors, (3902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:29,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 3902 transitions. [2021-04-15 02:33:29,713 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 3902 transitions. Word has length 21 [2021-04-15 02:33:29,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:29,713 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 3902 transitions. [2021-04-15 02:33:29,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:29,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 3902 transitions. [2021-04-15 02:33:29,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:29,715 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:29,715 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:29,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16289 [2021-04-15 02:33:29,915 INFO L428 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:29,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:29,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1489231728, now seen corresponding path program 361 times [2021-04-15 02:33:29,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:29,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082630511] [2021-04-15 02:33:29,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:29,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082630511] [2021-04-15 02:33:29,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281688979] [2021-04-15 02:33:29,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:29,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:29,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:30,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:30,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:33:30,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880038199] [2021-04-15 02:33:30,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:33:30,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:30,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:33:30,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:33:30,026 INFO L87 Difference]: Start difference. First operand 1398 states and 3902 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:30,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:30,160 INFO L93 Difference]: Finished difference Result 1568 states and 4165 transitions. [2021-04-15 02:33:30,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:33:30,160 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:30,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:30,162 INFO L225 Difference]: With dead ends: 1568 [2021-04-15 02:33:30,162 INFO L226 Difference]: Without dead ends: 1566 [2021-04-15 02:33:30,162 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:33:30,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2021-04-15 02:33:30,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1398. [2021-04-15 02:33:30,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.7924123120973516) internal successors, (3901), 1397 states have internal predecessors, (3901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:30,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 3901 transitions. [2021-04-15 02:33:30,176 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 3901 transitions. Word has length 21 [2021-04-15 02:33:30,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:30,176 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 3901 transitions. [2021-04-15 02:33:30,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:30,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 3901 transitions. [2021-04-15 02:33:30,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:30,177 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:30,177 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:30,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16290 [2021-04-15 02:33:30,377 INFO L428 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:30,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:30,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1169711439, now seen corresponding path program 362 times [2021-04-15 02:33:30,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:30,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350640089] [2021-04-15 02:33:30,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:30,444 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:30,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350640089] [2021-04-15 02:33:30,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816129739] [2021-04-15 02:33:30,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:30,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:33:30,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:30,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:30,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:30,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:30,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:33:30,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583269350] [2021-04-15 02:33:30,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:33:30,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:30,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:33:30,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:33:30,509 INFO L87 Difference]: Start difference. First operand 1398 states and 3901 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:30,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:30,601 INFO L93 Difference]: Finished difference Result 1703 states and 4442 transitions. [2021-04-15 02:33:30,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:33:30,602 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:30,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:30,603 INFO L225 Difference]: With dead ends: 1703 [2021-04-15 02:33:30,603 INFO L226 Difference]: Without dead ends: 1703 [2021-04-15 02:33:30,604 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:33:30,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-04-15 02:33:30,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1399. [2021-04-15 02:33:30,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 2.78826895565093) internal successors, (3898), 1398 states have internal predecessors, (3898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:30,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 3898 transitions. [2021-04-15 02:33:30,618 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 3898 transitions. Word has length 21 [2021-04-15 02:33:30,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:30,618 INFO L480 AbstractCegarLoop]: Abstraction has 1399 states and 3898 transitions. [2021-04-15 02:33:30,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:30,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 3898 transitions. [2021-04-15 02:33:30,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:30,619 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:30,619 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:30,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16291,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:30,820 INFO L428 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:30,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:30,820 INFO L82 PathProgramCache]: Analyzing trace with hash -853668908, now seen corresponding path program 363 times [2021-04-15 02:33:30,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:30,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354653120] [2021-04-15 02:33:30,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:30,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354653120] [2021-04-15 02:33:30,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059964249] [2021-04-15 02:33:30,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:30,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:33:30,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:30,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:30,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:30,965 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:30,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:30,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:33:30,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958538745] [2021-04-15 02:33:30,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:33:30,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:30,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:33:30,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:33:30,966 INFO L87 Difference]: Start difference. First operand 1399 states and 3898 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:31,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:31,191 INFO L93 Difference]: Finished difference Result 1746 states and 4637 transitions. [2021-04-15 02:33:31,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:33:31,191 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:31,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:31,193 INFO L225 Difference]: With dead ends: 1746 [2021-04-15 02:33:31,193 INFO L226 Difference]: Without dead ends: 1734 [2021-04-15 02:33:31,194 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:33:31,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-04-15 02:33:31,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1419. [2021-04-15 02:33:31,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 2.796191819464034) internal successors, (3965), 1418 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:31,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 3965 transitions. [2021-04-15 02:33:31,208 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 3965 transitions. Word has length 21 [2021-04-15 02:33:31,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:31,208 INFO L480 AbstractCegarLoop]: Abstraction has 1419 states and 3965 transitions. [2021-04-15 02:33:31,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:31,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 3965 transitions. [2021-04-15 02:33:31,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:31,209 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:31,209 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:31,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16292 [2021-04-15 02:33:31,410 INFO L428 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:31,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:31,410 INFO L82 PathProgramCache]: Analyzing trace with hash -230939083, now seen corresponding path program 364 times [2021-04-15 02:33:31,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:31,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493484942] [2021-04-15 02:33:31,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:31,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493484942] [2021-04-15 02:33:31,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920282559] [2021-04-15 02:33:31,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:31,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:33:31,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:31,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:31,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:31,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:31,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:33:31,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312980516] [2021-04-15 02:33:31,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:33:31,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:31,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:33:31,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:33:31,572 INFO L87 Difference]: Start difference. First operand 1419 states and 3965 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:31,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:31,768 INFO L93 Difference]: Finished difference Result 1714 states and 4627 transitions. [2021-04-15 02:33:31,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:33:31,768 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:31,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:31,770 INFO L225 Difference]: With dead ends: 1714 [2021-04-15 02:33:31,770 INFO L226 Difference]: Without dead ends: 1710 [2021-04-15 02:33:31,770 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:33:31,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-04-15 02:33:31,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1352. [2021-04-15 02:33:31,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 2.7860843819393044) internal successors, (3764), 1351 states have internal predecessors, (3764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:31,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 3764 transitions. [2021-04-15 02:33:31,784 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 3764 transitions. Word has length 21 [2021-04-15 02:33:31,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:31,784 INFO L480 AbstractCegarLoop]: Abstraction has 1352 states and 3764 transitions. [2021-04-15 02:33:31,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:31,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 3764 transitions. [2021-04-15 02:33:31,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:31,785 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:31,785 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:31,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16293,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:31,986 INFO L428 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:31,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:31,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1277980144, now seen corresponding path program 365 times [2021-04-15 02:33:31,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:31,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554077385] [2021-04-15 02:33:31,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:31,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:32,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554077385] [2021-04-15 02:33:32,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935120334] [2021-04-15 02:33:32,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:32,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:33:32,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:32,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:32,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:32,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:32,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:33:32,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382500782] [2021-04-15 02:33:32,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:33:32,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:32,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:33:32,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:33:32,140 INFO L87 Difference]: Start difference. First operand 1352 states and 3764 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:32,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:32,316 INFO L93 Difference]: Finished difference Result 1892 states and 4939 transitions. [2021-04-15 02:33:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:33:32,317 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:32,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:32,319 INFO L225 Difference]: With dead ends: 1892 [2021-04-15 02:33:32,319 INFO L226 Difference]: Without dead ends: 1878 [2021-04-15 02:33:32,319 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:33:32,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2021-04-15 02:33:32,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1354. [2021-04-15 02:33:32,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1353 states have (on average 2.785661492978566) internal successors, (3769), 1353 states have internal predecessors, (3769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:32,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 3769 transitions. [2021-04-15 02:33:32,333 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 3769 transitions. Word has length 21 [2021-04-15 02:33:32,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:32,334 INFO L480 AbstractCegarLoop]: Abstraction has 1354 states and 3769 transitions. [2021-04-15 02:33:32,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:32,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 3769 transitions. [2021-04-15 02:33:32,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:32,335 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:32,335 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:32,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16294,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:32,535 INFO L428 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:32,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:32,535 INFO L82 PathProgramCache]: Analyzing trace with hash -867405937, now seen corresponding path program 366 times [2021-04-15 02:33:32,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:32,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760046135] [2021-04-15 02:33:32,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:32,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760046135] [2021-04-15 02:33:32,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909577361] [2021-04-15 02:33:32,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:32,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:33:32,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:32,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:32,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:32,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:32,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:33:32,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900098015] [2021-04-15 02:33:32,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:33:32,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:32,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:33:32,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:33:32,688 INFO L87 Difference]: Start difference. First operand 1354 states and 3769 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:32,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:32,968 INFO L93 Difference]: Finished difference Result 1810 states and 4802 transitions. [2021-04-15 02:33:32,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:33:32,969 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:32,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:32,971 INFO L225 Difference]: With dead ends: 1810 [2021-04-15 02:33:32,971 INFO L226 Difference]: Without dead ends: 1810 [2021-04-15 02:33:32,971 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 243.5ms TimeCoverageRelationStatistics Valid=356, Invalid=700, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:33:32,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2021-04-15 02:33:32,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1323. [2021-04-15 02:33:32,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 2.793494704992436) internal successors, (3693), 1322 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:32,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 3693 transitions. [2021-04-15 02:33:32,985 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 3693 transitions. Word has length 21 [2021-04-15 02:33:32,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:32,985 INFO L480 AbstractCegarLoop]: Abstraction has 1323 states and 3693 transitions. [2021-04-15 02:33:32,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:32,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 3693 transitions. [2021-04-15 02:33:32,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:32,986 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:32,986 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:33,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16295 [2021-04-15 02:33:33,186 INFO L428 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:33,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:33,187 INFO L82 PathProgramCache]: Analyzing trace with hash 940996534, now seen corresponding path program 367 times [2021-04-15 02:33:33,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:33,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696492524] [2021-04-15 02:33:33,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:33,248 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:33,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696492524] [2021-04-15 02:33:33,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138193146] [2021-04-15 02:33:33,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:33,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:33,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:33,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:33,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:33:33,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508301946] [2021-04-15 02:33:33,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:33:33,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:33,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:33:33,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:33:33,347 INFO L87 Difference]: Start difference. First operand 1323 states and 3693 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:33,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:33,486 INFO L93 Difference]: Finished difference Result 1696 states and 4444 transitions. [2021-04-15 02:33:33,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:33:33,487 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:33,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:33,488 INFO L225 Difference]: With dead ends: 1696 [2021-04-15 02:33:33,488 INFO L226 Difference]: Without dead ends: 1696 [2021-04-15 02:33:33,489 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:33:33,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-04-15 02:33:33,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1401. [2021-04-15 02:33:33,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1400 states have (on average 2.8235714285714284) internal successors, (3953), 1400 states have internal predecessors, (3953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 3953 transitions. [2021-04-15 02:33:33,503 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 3953 transitions. Word has length 21 [2021-04-15 02:33:33,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:33,503 INFO L480 AbstractCegarLoop]: Abstraction has 1401 states and 3953 transitions. [2021-04-15 02:33:33,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:33,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 3953 transitions. [2021-04-15 02:33:33,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:33,504 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:33,504 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:33,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16296,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:33,720 INFO L428 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:33,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:33,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1675804555, now seen corresponding path program 368 times [2021-04-15 02:33:33,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:33,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142923181] [2021-04-15 02:33:33,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:33,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:33,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142923181] [2021-04-15 02:33:33,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44330057] [2021-04-15 02:33:33,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:33,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:33:33,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:33,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:33,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:33,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:33,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:33:33,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443997733] [2021-04-15 02:33:33,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:33:33,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:33,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:33:33,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:33:33,851 INFO L87 Difference]: Start difference. First operand 1401 states and 3953 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:34,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:34,089 INFO L93 Difference]: Finished difference Result 1640 states and 4370 transitions. [2021-04-15 02:33:34,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:33:34,090 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:34,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:34,091 INFO L225 Difference]: With dead ends: 1640 [2021-04-15 02:33:34,092 INFO L226 Difference]: Without dead ends: 1636 [2021-04-15 02:33:34,092 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 149.4ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:33:34,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2021-04-15 02:33:34,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1419. [2021-04-15 02:33:34,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 2.8314527503526095) internal successors, (4015), 1418 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:34,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4015 transitions. [2021-04-15 02:33:34,106 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4015 transitions. Word has length 21 [2021-04-15 02:33:34,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:34,106 INFO L480 AbstractCegarLoop]: Abstraction has 1419 states and 4015 transitions. [2021-04-15 02:33:34,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:34,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4015 transitions. [2021-04-15 02:33:34,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:34,107 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:34,107 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:34,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16297 [2021-04-15 02:33:34,308 INFO L428 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:34,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:34,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1134729418, now seen corresponding path program 369 times [2021-04-15 02:33:34,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:34,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345681291] [2021-04-15 02:33:34,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:34,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:34,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345681291] [2021-04-15 02:33:34,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812549842] [2021-04-15 02:33:34,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:34,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:33:34,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:34,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:34,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:34,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:34,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:33:34,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91463430] [2021-04-15 02:33:34,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:33:34,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:34,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:33:34,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:33:34,425 INFO L87 Difference]: Start difference. First operand 1419 states and 4015 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:34,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:34,579 INFO L93 Difference]: Finished difference Result 1665 states and 4422 transitions. [2021-04-15 02:33:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:33:34,580 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:34,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:34,582 INFO L225 Difference]: With dead ends: 1665 [2021-04-15 02:33:34,582 INFO L226 Difference]: Without dead ends: 1663 [2021-04-15 02:33:34,582 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 98.0ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:33:34,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2021-04-15 02:33:34,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1419. [2021-04-15 02:33:34,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 2.830042313117066) internal successors, (4013), 1418 states have internal predecessors, (4013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:34,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4013 transitions. [2021-04-15 02:33:34,597 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4013 transitions. Word has length 21 [2021-04-15 02:33:34,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:34,597 INFO L480 AbstractCegarLoop]: Abstraction has 1419 states and 4013 transitions. [2021-04-15 02:33:34,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:34,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4013 transitions. [2021-04-15 02:33:34,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:34,598 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:34,598 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:34,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16298 [2021-04-15 02:33:34,799 INFO L428 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:34,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:34,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1524213749, now seen corresponding path program 370 times [2021-04-15 02:33:34,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:34,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559369881] [2021-04-15 02:33:34,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:34,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559369881] [2021-04-15 02:33:34,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220076968] [2021-04-15 02:33:34,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:34,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:33:34,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:34,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:34,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:34,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:34,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:33:34,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574308680] [2021-04-15 02:33:34,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:33:34,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:34,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:33:34,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:33:34,941 INFO L87 Difference]: Start difference. First operand 1419 states and 4013 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:35,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:35,059 INFO L93 Difference]: Finished difference Result 1795 states and 4748 transitions. [2021-04-15 02:33:35,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:33:35,060 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:35,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:35,062 INFO L225 Difference]: With dead ends: 1795 [2021-04-15 02:33:35,062 INFO L226 Difference]: Without dead ends: 1795 [2021-04-15 02:33:35,062 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:33:35,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2021-04-15 02:33:35,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1431. [2021-04-15 02:33:35,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1430 states have (on average 2.827972027972028) internal successors, (4044), 1430 states have internal predecessors, (4044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:35,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 4044 transitions. [2021-04-15 02:33:35,077 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 4044 transitions. Word has length 21 [2021-04-15 02:33:35,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:35,077 INFO L480 AbstractCegarLoop]: Abstraction has 1431 states and 4044 transitions. [2021-04-15 02:33:35,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:35,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 4044 transitions. [2021-04-15 02:33:35,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:35,078 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:35,079 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:35,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16299,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:35,279 INFO L428 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:35,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:35,279 INFO L82 PathProgramCache]: Analyzing trace with hash 18584182, now seen corresponding path program 371 times [2021-04-15 02:33:35,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:35,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990262247] [2021-04-15 02:33:35,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:35,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990262247] [2021-04-15 02:33:35,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787381350] [2021-04-15 02:33:35,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:35,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:33:35,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:35,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:35,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:35,440 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:35,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:35,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:33:35,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447867843] [2021-04-15 02:33:35,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:33:35,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:35,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:33:35,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:33:35,441 INFO L87 Difference]: Start difference. First operand 1431 states and 4044 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:35,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:35,646 INFO L93 Difference]: Finished difference Result 1934 states and 5102 transitions. [2021-04-15 02:33:35,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:33:35,647 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:35,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:35,649 INFO L225 Difference]: With dead ends: 1934 [2021-04-15 02:33:35,649 INFO L226 Difference]: Without dead ends: 1920 [2021-04-15 02:33:35,649 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 154.6ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:33:35,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-04-15 02:33:35,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1431. [2021-04-15 02:33:35,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1430 states have (on average 2.827272727272727) internal successors, (4043), 1430 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:35,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 4043 transitions. [2021-04-15 02:33:35,665 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 4043 transitions. Word has length 21 [2021-04-15 02:33:35,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:35,665 INFO L480 AbstractCegarLoop]: Abstraction has 1431 states and 4043 transitions. [2021-04-15 02:33:35,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:35,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 4043 transitions. [2021-04-15 02:33:35,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:35,666 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:35,666 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:35,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16300 [2021-04-15 02:33:35,866 INFO L428 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:35,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:35,866 INFO L82 PathProgramCache]: Analyzing trace with hash 429158389, now seen corresponding path program 372 times [2021-04-15 02:33:35,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:35,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235068825] [2021-04-15 02:33:35,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:35,938 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:35,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235068825] [2021-04-15 02:33:35,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385651126] [2021-04-15 02:33:35,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:35,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:33:35,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:35,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:35,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:36,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:36,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:33:36,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674466240] [2021-04-15 02:33:36,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:33:36,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:36,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:33:36,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:33:36,017 INFO L87 Difference]: Start difference. First operand 1431 states and 4043 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:36,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:36,265 INFO L93 Difference]: Finished difference Result 1818 states and 4976 transitions. [2021-04-15 02:33:36,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:33:36,266 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:36,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:36,268 INFO L225 Difference]: With dead ends: 1818 [2021-04-15 02:33:36,268 INFO L226 Difference]: Without dead ends: 1818 [2021-04-15 02:33:36,268 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:33:36,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2021-04-15 02:33:36,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1629. [2021-04-15 02:33:36,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 2.8316953316953315) internal successors, (4610), 1628 states have internal predecessors, (4610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:36,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 4610 transitions. [2021-04-15 02:33:36,283 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 4610 transitions. Word has length 21 [2021-04-15 02:33:36,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:36,284 INFO L480 AbstractCegarLoop]: Abstraction has 1629 states and 4610 transitions. [2021-04-15 02:33:36,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:36,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 4610 transitions. [2021-04-15 02:33:36,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:36,285 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:36,285 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:36,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16301 [2021-04-15 02:33:36,485 INFO L428 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:36,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:36,486 INFO L82 PathProgramCache]: Analyzing trace with hash 186543602, now seen corresponding path program 373 times [2021-04-15 02:33:36,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:36,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989558037] [2021-04-15 02:33:36,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:36,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989558037] [2021-04-15 02:33:36,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168917308] [2021-04-15 02:33:36,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:36,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:36,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:36,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:36,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:33:36,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609959017] [2021-04-15 02:33:36,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:33:36,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:36,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:33:36,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:33:36,612 INFO L87 Difference]: Start difference. First operand 1629 states and 4610 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:36,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:36,692 INFO L93 Difference]: Finished difference Result 2167 states and 5841 transitions. [2021-04-15 02:33:36,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:33:36,693 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:36,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:36,695 INFO L225 Difference]: With dead ends: 2167 [2021-04-15 02:33:36,695 INFO L226 Difference]: Without dead ends: 2167 [2021-04-15 02:33:36,696 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:33:36,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2021-04-15 02:33:36,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 1854. [2021-04-15 02:33:36,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1854 states, 1853 states have (on average 2.870480302212628) internal successors, (5319), 1853 states have internal predecessors, (5319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:36,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 5319 transitions. [2021-04-15 02:33:36,714 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 5319 transitions. Word has length 21 [2021-04-15 02:33:36,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:36,715 INFO L480 AbstractCegarLoop]: Abstraction has 1854 states and 5319 transitions. [2021-04-15 02:33:36,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:36,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 5319 transitions. [2021-04-15 02:33:36,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:36,716 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:36,716 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:36,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16302 [2021-04-15 02:33:36,917 INFO L428 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:36,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:36,917 INFO L82 PathProgramCache]: Analyzing trace with hash -590605997, now seen corresponding path program 374 times [2021-04-15 02:33:36,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:36,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690605901] [2021-04-15 02:33:36,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:36,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690605901] [2021-04-15 02:33:36,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202223344] [2021-04-15 02:33:36,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:36,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:33:36,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:36,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:36,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:37,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:37,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:33:37,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108940793] [2021-04-15 02:33:37,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:33:37,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:37,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:33:37,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:33:37,040 INFO L87 Difference]: Start difference. First operand 1854 states and 5319 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:37,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:37,239 INFO L93 Difference]: Finished difference Result 2069 states and 5690 transitions. [2021-04-15 02:33:37,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:33:37,239 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:37,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:37,242 INFO L225 Difference]: With dead ends: 2069 [2021-04-15 02:33:37,242 INFO L226 Difference]: Without dead ends: 2067 [2021-04-15 02:33:37,242 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:33:37,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-04-15 02:33:37,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1876. [2021-04-15 02:33:37,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.8789333333333333) internal successors, (5398), 1875 states have internal predecessors, (5398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:37,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 5398 transitions. [2021-04-15 02:33:37,262 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 5398 transitions. Word has length 21 [2021-04-15 02:33:37,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:37,262 INFO L480 AbstractCegarLoop]: Abstraction has 1876 states and 5398 transitions. [2021-04-15 02:33:37,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:37,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 5398 transitions. [2021-04-15 02:33:37,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:37,263 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:37,263 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:37,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16303,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:37,467 INFO L428 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:37,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:37,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1538935856, now seen corresponding path program 375 times [2021-04-15 02:33:37,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:37,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572520445] [2021-04-15 02:33:37,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:37,517 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:37,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572520445] [2021-04-15 02:33:37,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768888106] [2021-04-15 02:33:37,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:37,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:33:37,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:37,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:37,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:37,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:37,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:33:37,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82488470] [2021-04-15 02:33:37,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:33:37,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:37,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:33:37,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:33:37,585 INFO L87 Difference]: Start difference. First operand 1876 states and 5398 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:37,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:37,747 INFO L93 Difference]: Finished difference Result 2160 states and 5868 transitions. [2021-04-15 02:33:37,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:33:37,748 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:37,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:37,750 INFO L225 Difference]: With dead ends: 2160 [2021-04-15 02:33:37,750 INFO L226 Difference]: Without dead ends: 2158 [2021-04-15 02:33:37,750 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:33:37,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-04-15 02:33:37,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1876. [2021-04-15 02:33:37,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.8784) internal successors, (5397), 1875 states have internal predecessors, (5397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:37,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 5397 transitions. [2021-04-15 02:33:37,770 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 5397 transitions. Word has length 21 [2021-04-15 02:33:37,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:37,770 INFO L480 AbstractCegarLoop]: Abstraction has 1876 states and 5397 transitions. [2021-04-15 02:33:37,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:37,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 5397 transitions. [2021-04-15 02:33:37,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:37,771 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:37,771 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:37,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16304,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:37,973 INFO L428 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:37,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:37,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1120007311, now seen corresponding path program 376 times [2021-04-15 02:33:37,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:37,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056137731] [2021-04-15 02:33:37,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:37,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:38,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056137731] [2021-04-15 02:33:38,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421065279] [2021-04-15 02:33:38,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:38,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:33:38,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:38,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:38,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:38,090 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:38,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:38,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:33:38,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952402052] [2021-04-15 02:33:38,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:33:38,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:38,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:33:38,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:33:38,098 INFO L87 Difference]: Start difference. First operand 1876 states and 5397 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:38,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:38,219 INFO L93 Difference]: Finished difference Result 2164 states and 5944 transitions. [2021-04-15 02:33:38,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:33:38,220 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:38,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:38,222 INFO L225 Difference]: With dead ends: 2164 [2021-04-15 02:33:38,222 INFO L226 Difference]: Without dead ends: 2164 [2021-04-15 02:33:38,222 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:33:38,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2021-04-15 02:33:38,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 1880. [2021-04-15 02:33:38,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1879 states have (on average 2.8786588610963277) internal successors, (5409), 1879 states have internal predecessors, (5409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:38,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 5409 transitions. [2021-04-15 02:33:38,242 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 5409 transitions. Word has length 21 [2021-04-15 02:33:38,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:38,242 INFO L480 AbstractCegarLoop]: Abstraction has 1880 states and 5409 transitions. [2021-04-15 02:33:38,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:38,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 5409 transitions. [2021-04-15 02:33:38,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:38,244 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:38,244 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:38,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16305,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:38,444 INFO L428 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:38,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:38,445 INFO L82 PathProgramCache]: Analyzing trace with hash -49530860, now seen corresponding path program 377 times [2021-04-15 02:33:38,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:38,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212890764] [2021-04-15 02:33:38,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:38,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:38,498 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:38,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212890764] [2021-04-15 02:33:38,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681093784] [2021-04-15 02:33:38,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:38,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:33:38,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:38,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:38,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:38,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:38,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:33:38,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832635857] [2021-04-15 02:33:38,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:33:38,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:38,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:33:38,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:33:38,565 INFO L87 Difference]: Start difference. First operand 1880 states and 5409 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:38,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:38,728 INFO L93 Difference]: Finished difference Result 2226 states and 6044 transitions. [2021-04-15 02:33:38,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:33:38,729 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:38,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:38,731 INFO L225 Difference]: With dead ends: 2226 [2021-04-15 02:33:38,731 INFO L226 Difference]: Without dead ends: 2222 [2021-04-15 02:33:38,731 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:33:38,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-04-15 02:33:38,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1880. [2021-04-15 02:33:38,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1879 states have (on average 2.87812666311868) internal successors, (5408), 1879 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:38,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 5408 transitions. [2021-04-15 02:33:38,751 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 5408 transitions. Word has length 21 [2021-04-15 02:33:38,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:38,751 INFO L480 AbstractCegarLoop]: Abstraction has 1880 states and 5408 transitions. [2021-04-15 02:33:38,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:38,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 5408 transitions. [2021-04-15 02:33:38,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:38,752 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:38,752 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:38,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16306,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:38,953 INFO L428 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:38,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:38,953 INFO L82 PathProgramCache]: Analyzing trace with hash -940852491, now seen corresponding path program 378 times [2021-04-15 02:33:38,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:38,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477076441] [2021-04-15 02:33:38,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:39,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477076441] [2021-04-15 02:33:39,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117242679] [2021-04-15 02:33:39,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:39,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:33:39,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:39,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:39,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:39,098 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:39,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:39,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:33:39,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161383038] [2021-04-15 02:33:39,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:33:39,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:39,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:33:39,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:33:39,099 INFO L87 Difference]: Start difference. First operand 1880 states and 5408 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:39,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:39,265 INFO L93 Difference]: Finished difference Result 2131 states and 5923 transitions. [2021-04-15 02:33:39,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:33:39,266 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:39,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:39,268 INFO L225 Difference]: With dead ends: 2131 [2021-04-15 02:33:39,268 INFO L226 Difference]: Without dead ends: 2131 [2021-04-15 02:33:39,268 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 141.3ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:33:39,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-04-15 02:33:39,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1896. [2021-04-15 02:33:39,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 2.880738786279683) internal successors, (5459), 1895 states have internal predecessors, (5459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:39,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 5459 transitions. [2021-04-15 02:33:39,287 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 5459 transitions. Word has length 21 [2021-04-15 02:33:39,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:39,287 INFO L480 AbstractCegarLoop]: Abstraction has 1896 states and 5459 transitions. [2021-04-15 02:33:39,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:39,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 5459 transitions. [2021-04-15 02:33:39,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:39,289 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:39,289 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:39,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16307 [2021-04-15 02:33:39,489 INFO L428 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:39,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:39,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1122616240, now seen corresponding path program 379 times [2021-04-15 02:33:39,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:39,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786863926] [2021-04-15 02:33:39,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:39,545 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:39,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786863926] [2021-04-15 02:33:39,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564071468] [2021-04-15 02:33:39,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:39,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:39,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:39,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:39,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:33:39,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068651902] [2021-04-15 02:33:39,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:33:39,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:39,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:33:39,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:33:39,628 INFO L87 Difference]: Start difference. First operand 1896 states and 5459 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:39,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:39,810 INFO L93 Difference]: Finished difference Result 2262 states and 6134 transitions. [2021-04-15 02:33:39,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:33:39,810 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:39,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:39,813 INFO L225 Difference]: With dead ends: 2262 [2021-04-15 02:33:39,813 INFO L226 Difference]: Without dead ends: 2256 [2021-04-15 02:33:39,813 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:33:39,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2021-04-15 02:33:39,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 1915. [2021-04-15 02:33:39,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 2.8876698014629048) internal successors, (5527), 1914 states have internal predecessors, (5527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:39,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 5527 transitions. [2021-04-15 02:33:39,832 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 5527 transitions. Word has length 21 [2021-04-15 02:33:39,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:39,832 INFO L480 AbstractCegarLoop]: Abstraction has 1915 states and 5527 transitions. [2021-04-15 02:33:39,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:39,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 5527 transitions. [2021-04-15 02:33:39,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:39,834 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:39,834 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:40,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16308,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:40,034 INFO L428 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:40,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:40,035 INFO L82 PathProgramCache]: Analyzing trace with hash -402996913, now seen corresponding path program 380 times [2021-04-15 02:33:40,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:40,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230510381] [2021-04-15 02:33:40,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:40,086 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:40,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230510381] [2021-04-15 02:33:40,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048304635] [2021-04-15 02:33:40,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:40,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:33:40,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:40,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:40,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:40,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:40,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:33:40,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236774194] [2021-04-15 02:33:40,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:33:40,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:40,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:33:40,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:33:40,161 INFO L87 Difference]: Start difference. First operand 1915 states and 5527 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:40,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:40,342 INFO L93 Difference]: Finished difference Result 2204 states and 6118 transitions. [2021-04-15 02:33:40,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:33:40,342 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:40,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:40,345 INFO L225 Difference]: With dead ends: 2204 [2021-04-15 02:33:40,345 INFO L226 Difference]: Without dead ends: 2202 [2021-04-15 02:33:40,345 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 142.2ms TimeCoverageRelationStatistics Valid=209, Invalid=391, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:33:40,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-04-15 02:33:40,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1917. [2021-04-15 02:33:40,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1916 states have (on average 2.887787056367432) internal successors, (5533), 1916 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:40,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 5533 transitions. [2021-04-15 02:33:40,364 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 5533 transitions. Word has length 21 [2021-04-15 02:33:40,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:40,364 INFO L480 AbstractCegarLoop]: Abstraction has 1917 states and 5533 transitions. [2021-04-15 02:33:40,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:40,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 5533 transitions. [2021-04-15 02:33:40,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:40,366 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:40,366 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:40,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16309,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:40,566 INFO L428 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:40,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:40,567 INFO L82 PathProgramCache]: Analyzing trace with hash -909343179, now seen corresponding path program 381 times [2021-04-15 02:33:40,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:40,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017044228] [2021-04-15 02:33:40,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:40,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017044228] [2021-04-15 02:33:40,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628222029] [2021-04-15 02:33:40,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:40,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:33:40,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:40,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:40,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:40,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:40,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:33:40,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412829546] [2021-04-15 02:33:40,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:33:40,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:40,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:33:40,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:33:40,689 INFO L87 Difference]: Start difference. First operand 1917 states and 5533 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:40,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:40,869 INFO L93 Difference]: Finished difference Result 2248 states and 6327 transitions. [2021-04-15 02:33:40,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:33:40,870 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:40,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:40,873 INFO L225 Difference]: With dead ends: 2248 [2021-04-15 02:33:40,873 INFO L226 Difference]: Without dead ends: 2248 [2021-04-15 02:33:40,873 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 144.0ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:33:40,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-04-15 02:33:40,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2054. [2021-04-15 02:33:40,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 2.895762299074525) internal successors, (5945), 2053 states have internal predecessors, (5945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:40,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 5945 transitions. [2021-04-15 02:33:40,894 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 5945 transitions. Word has length 21 [2021-04-15 02:33:40,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:40,894 INFO L480 AbstractCegarLoop]: Abstraction has 2054 states and 5945 transitions. [2021-04-15 02:33:40,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:40,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 5945 transitions. [2021-04-15 02:33:40,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:40,896 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:40,896 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:41,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16310 [2021-04-15 02:33:41,096 INFO L428 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:41,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:41,096 INFO L82 PathProgramCache]: Analyzing trace with hash -471423792, now seen corresponding path program 382 times [2021-04-15 02:33:41,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:41,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952896545] [2021-04-15 02:33:41,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:41,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952896545] [2021-04-15 02:33:41,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646082571] [2021-04-15 02:33:41,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:41,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:33:41,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:41,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:41,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:41,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:41,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:33:41,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094762965] [2021-04-15 02:33:41,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:33:41,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:41,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:33:41,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:33:41,235 INFO L87 Difference]: Start difference. First operand 2054 states and 5945 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:41,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:41,438 INFO L93 Difference]: Finished difference Result 2927 states and 7947 transitions. [2021-04-15 02:33:41,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:33:41,439 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:41,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:41,442 INFO L225 Difference]: With dead ends: 2927 [2021-04-15 02:33:41,442 INFO L226 Difference]: Without dead ends: 2917 [2021-04-15 02:33:41,443 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:33:41,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-04-15 02:33:41,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2066. [2021-04-15 02:33:41,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 2.8949152542372882) internal successors, (5978), 2065 states have internal predecessors, (5978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:41,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 5978 transitions. [2021-04-15 02:33:41,466 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 5978 transitions. Word has length 21 [2021-04-15 02:33:41,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:41,466 INFO L480 AbstractCegarLoop]: Abstraction has 2066 states and 5978 transitions. [2021-04-15 02:33:41,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:41,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 5978 transitions. [2021-04-15 02:33:41,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:41,467 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:41,467 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:41,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16311 [2021-04-15 02:33:41,668 INFO L428 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:41,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:41,668 INFO L82 PathProgramCache]: Analyzing trace with hash 573791759, now seen corresponding path program 383 times [2021-04-15 02:33:41,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:41,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895613319] [2021-04-15 02:33:41,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:41,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895613319] [2021-04-15 02:33:41,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624369194] [2021-04-15 02:33:41,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:41,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:33:41,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:41,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:41,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:41,815 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:41,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:41,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:33:41,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715795073] [2021-04-15 02:33:41,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:33:41,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:41,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:33:41,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:33:41,816 INFO L87 Difference]: Start difference. First operand 2066 states and 5978 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:41,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:41,987 INFO L93 Difference]: Finished difference Result 2220 states and 6263 transitions. [2021-04-15 02:33:41,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:33:41,988 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:41,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:41,990 INFO L225 Difference]: With dead ends: 2220 [2021-04-15 02:33:41,990 INFO L226 Difference]: Without dead ends: 2214 [2021-04-15 02:33:41,991 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 153.2ms TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:33:41,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-04-15 02:33:42,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2055. [2021-04-15 02:33:42,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.8938656280428434) internal successors, (5944), 2054 states have internal predecessors, (5944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:42,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5944 transitions. [2021-04-15 02:33:42,010 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5944 transitions. Word has length 21 [2021-04-15 02:33:42,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:42,010 INFO L480 AbstractCegarLoop]: Abstraction has 2055 states and 5944 transitions. [2021-04-15 02:33:42,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:42,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5944 transitions. [2021-04-15 02:33:42,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:42,012 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:42,012 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:42,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16312 [2021-04-15 02:33:42,212 INFO L428 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:42,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:42,213 INFO L82 PathProgramCache]: Analyzing trace with hash -693665419, now seen corresponding path program 384 times [2021-04-15 02:33:42,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:42,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106506618] [2021-04-15 02:33:42,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:42,296 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:42,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106506618] [2021-04-15 02:33:42,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9007988] [2021-04-15 02:33:42,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:42,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:33:42,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:42,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:42,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:42,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:42,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:33:42,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614848539] [2021-04-15 02:33:42,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:33:42,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:42,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:33:42,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:33:42,379 INFO L87 Difference]: Start difference. First operand 2055 states and 5944 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:42,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:42,495 INFO L93 Difference]: Finished difference Result 2405 states and 6839 transitions. [2021-04-15 02:33:42,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:33:42,496 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:42,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:42,499 INFO L225 Difference]: With dead ends: 2405 [2021-04-15 02:33:42,499 INFO L226 Difference]: Without dead ends: 2405 [2021-04-15 02:33:42,499 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:33:42,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-04-15 02:33:42,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 2231. [2021-04-15 02:33:42,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2231 states, 2230 states have (on average 2.8937219730941703) internal successors, (6453), 2230 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:42,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 6453 transitions. [2021-04-15 02:33:42,521 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 6453 transitions. Word has length 21 [2021-04-15 02:33:42,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:42,521 INFO L480 AbstractCegarLoop]: Abstraction has 2231 states and 6453 transitions. [2021-04-15 02:33:42,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:42,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 6453 transitions. [2021-04-15 02:33:42,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:42,523 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:42,523 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:42,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16313 [2021-04-15 02:33:42,724 INFO L428 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:42,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:42,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1740706480, now seen corresponding path program 385 times [2021-04-15 02:33:42,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:42,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506962858] [2021-04-15 02:33:42,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:42,805 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:42,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506962858] [2021-04-15 02:33:42,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454099357] [2021-04-15 02:33:42,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:42,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:42,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:42,875 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:42,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:42,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:33:42,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119190760] [2021-04-15 02:33:42,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:33:42,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:42,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:33:42,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:33:42,876 INFO L87 Difference]: Start difference. First operand 2231 states and 6453 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:43,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:43,077 INFO L93 Difference]: Finished difference Result 3084 states and 8355 transitions. [2021-04-15 02:33:43,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:33:43,078 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:43,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:43,081 INFO L225 Difference]: With dead ends: 3084 [2021-04-15 02:33:43,081 INFO L226 Difference]: Without dead ends: 3070 [2021-04-15 02:33:43,081 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:33:43,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-04-15 02:33:43,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 2241. [2021-04-15 02:33:43,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 2.8924107142857145) internal successors, (6479), 2240 states have internal predecessors, (6479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:43,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 6479 transitions. [2021-04-15 02:33:43,106 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 6479 transitions. Word has length 21 [2021-04-15 02:33:43,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:43,106 INFO L480 AbstractCegarLoop]: Abstraction has 2241 states and 6479 transitions. [2021-04-15 02:33:43,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:43,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 6479 transitions. [2021-04-15 02:33:43,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:43,108 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:43,108 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:43,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16314,390 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:43,308 INFO L428 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:43,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:43,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1330132273, now seen corresponding path program 386 times [2021-04-15 02:33:43,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:43,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001685281] [2021-04-15 02:33:43,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:43,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001685281] [2021-04-15 02:33:43,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283906202] [2021-04-15 02:33:43,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:43,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:33:43,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:43,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:43,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:43,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:43,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:33:43,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524682436] [2021-04-15 02:33:43,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:33:43,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:43,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:33:43,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:33:43,485 INFO L87 Difference]: Start difference. First operand 2241 states and 6479 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:43,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:43,706 INFO L93 Difference]: Finished difference Result 2484 states and 7025 transitions. [2021-04-15 02:33:43,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:33:43,707 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:43,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:43,709 INFO L225 Difference]: With dead ends: 2484 [2021-04-15 02:33:43,709 INFO L226 Difference]: Without dead ends: 2484 [2021-04-15 02:33:43,710 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:33:43,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-04-15 02:33:43,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 2245. [2021-04-15 02:33:43,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 2.892602495543672) internal successors, (6491), 2244 states have internal predecessors, (6491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:43,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 6491 transitions. [2021-04-15 02:33:43,732 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 6491 transitions. Word has length 21 [2021-04-15 02:33:43,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:43,732 INFO L480 AbstractCegarLoop]: Abstraction has 2245 states and 6491 transitions. [2021-04-15 02:33:43,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:43,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 6491 transitions. [2021-04-15 02:33:43,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:43,734 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:43,734 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:43,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16315,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:43,935 INFO L428 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:43,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:43,935 INFO L82 PathProgramCache]: Analyzing trace with hash -2009452908, now seen corresponding path program 387 times [2021-04-15 02:33:43,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:43,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532874186] [2021-04-15 02:33:43,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:44,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532874186] [2021-04-15 02:33:44,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513502892] [2021-04-15 02:33:44,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:44,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:33:44,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:44,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:44,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:44,102 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:44,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:44,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:33:44,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256398946] [2021-04-15 02:33:44,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:33:44,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:44,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:33:44,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:33:44,103 INFO L87 Difference]: Start difference. First operand 2245 states and 6491 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:44,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:44,214 INFO L93 Difference]: Finished difference Result 2777 states and 7639 transitions. [2021-04-15 02:33:44,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:33:44,214 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:44,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:44,217 INFO L225 Difference]: With dead ends: 2777 [2021-04-15 02:33:44,217 INFO L226 Difference]: Without dead ends: 2761 [2021-04-15 02:33:44,218 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:33:44,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2021-04-15 02:33:44,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 2243. [2021-04-15 02:33:44,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 2242 states have (on average 2.893398751115076) internal successors, (6487), 2242 states have internal predecessors, (6487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:44,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 6487 transitions. [2021-04-15 02:33:44,240 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 6487 transitions. Word has length 21 [2021-04-15 02:33:44,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:44,240 INFO L480 AbstractCegarLoop]: Abstraction has 2243 states and 6487 transitions. [2021-04-15 02:33:44,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:44,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 6487 transitions. [2021-04-15 02:33:44,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:33:44,242 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:44,242 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:44,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16316,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:44,442 INFO L428 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:44,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:44,442 INFO L82 PathProgramCache]: Analyzing trace with hash 414231733, now seen corresponding path program 388 times [2021-04-15 02:33:44,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:44,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737022835] [2021-04-15 02:33:44,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:44,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737022835] [2021-04-15 02:33:44,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215754297] [2021-04-15 02:33:44,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:44,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:33:44,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:44,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:33:44,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:44,621 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:44,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:44,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:33:44,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786887639] [2021-04-15 02:33:44,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:33:44,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:44,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:33:44,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:33:44,621 INFO L87 Difference]: Start difference. First operand 2243 states and 6487 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:44,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:44,918 INFO L93 Difference]: Finished difference Result 2725 states and 7700 transitions. [2021-04-15 02:33:44,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:33:44,919 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:33:44,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:44,922 INFO L225 Difference]: With dead ends: 2725 [2021-04-15 02:33:44,922 INFO L226 Difference]: Without dead ends: 2725 [2021-04-15 02:33:44,922 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 264.6ms TimeCoverageRelationStatistics Valid=338, Invalid=654, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:33:44,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-04-15 02:33:44,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 2301. [2021-04-15 02:33:44,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2301 states, 2300 states have (on average 2.893478260869565) internal successors, (6655), 2300 states have internal predecessors, (6655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:44,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 6655 transitions. [2021-04-15 02:33:44,945 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 6655 transitions. Word has length 21 [2021-04-15 02:33:44,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:44,945 INFO L480 AbstractCegarLoop]: Abstraction has 2301 states and 6655 transitions. [2021-04-15 02:33:44,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:44,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 6655 transitions. [2021-04-15 02:33:44,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:44,947 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:44,947 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:45,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16317,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:45,147 INFO L428 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:45,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:45,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1134083623, now seen corresponding path program 389 times [2021-04-15 02:33:45,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:45,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779330272] [2021-04-15 02:33:45,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:45,359 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:45,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779330272] [2021-04-15 02:33:45,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374503304] [2021-04-15 02:33:45,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:45,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:33:45,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:45,379 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:33:45,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:46,012 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:33:46,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:46,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:33:49,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:33:49,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:49,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:33:49,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:33:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:49,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:49,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 02:33:49,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444289449] [2021-04-15 02:33:49,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 02:33:49,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:49,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 02:33:49,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:33:49,476 INFO L87 Difference]: Start difference. First operand 2301 states and 6655 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:50,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:50,078 INFO L93 Difference]: Finished difference Result 2401 states and 6850 transitions. [2021-04-15 02:33:50,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:33:50,079 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:50,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:50,081 INFO L225 Difference]: With dead ends: 2401 [2021-04-15 02:33:50,082 INFO L226 Difference]: Without dead ends: 2362 [2021-04-15 02:33:50,082 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 828.1ms TimeCoverageRelationStatistics Valid=122, Invalid=1438, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 02:33:50,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2021-04-15 02:33:50,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 2321. [2021-04-15 02:33:50,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 2320 states have (on average 2.8922413793103448) internal successors, (6710), 2320 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:50,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 6710 transitions. [2021-04-15 02:33:50,102 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 6710 transitions. Word has length 22 [2021-04-15 02:33:50,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:50,103 INFO L480 AbstractCegarLoop]: Abstraction has 2321 states and 6710 transitions. [2021-04-15 02:33:50,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:50,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 6710 transitions. [2021-04-15 02:33:50,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:50,104 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:50,104 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:50,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16318,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:50,305 INFO L428 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:50,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:50,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1610689749, now seen corresponding path program 390 times [2021-04-15 02:33:50,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:50,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120159202] [2021-04-15 02:33:50,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:50,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120159202] [2021-04-15 02:33:50,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276245436] [2021-04-15 02:33:50,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:50,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:33:50,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:50,484 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:33:50,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:51,070 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:33:51,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:51,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:33:51,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:33:51,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:51,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:33:51,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:33:51,833 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:51,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:51,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-04-15 02:33:51,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650497184] [2021-04-15 02:33:51,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:33:51,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:51,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:33:51,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:33:51,834 INFO L87 Difference]: Start difference. First operand 2321 states and 6710 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:52,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:52,366 INFO L93 Difference]: Finished difference Result 2430 states and 6936 transitions. [2021-04-15 02:33:52,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:33:52,367 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:52,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:52,370 INFO L225 Difference]: With dead ends: 2430 [2021-04-15 02:33:52,370 INFO L226 Difference]: Without dead ends: 2414 [2021-04-15 02:33:52,370 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 615.5ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:33:52,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-04-15 02:33:52,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 2342. [2021-04-15 02:33:52,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2341 states have (on average 2.897052541648868) internal successors, (6782), 2341 states have internal predecessors, (6782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:52,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 6782 transitions. [2021-04-15 02:33:52,393 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 6782 transitions. Word has length 22 [2021-04-15 02:33:52,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:52,393 INFO L480 AbstractCegarLoop]: Abstraction has 2342 states and 6782 transitions. [2021-04-15 02:33:52,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:52,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 6782 transitions. [2021-04-15 02:33:52,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:52,395 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:52,395 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:52,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17475,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:52,596 INFO L428 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:52,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:52,596 INFO L82 PathProgramCache]: Analyzing trace with hash -751815219, now seen corresponding path program 391 times [2021-04-15 02:33:52,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:52,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874657143] [2021-04-15 02:33:52,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:52,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:52,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874657143] [2021-04-15 02:33:52,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370997448] [2021-04-15 02:33:52,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:52,763 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:33:52,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:53,317 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:33:53,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:53,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:33:53,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:33:54,132 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:33:54,133 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:33:54,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:33:55,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:33:55,422 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:33:55,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:33:55,423 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:33:55,468 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:55,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:55,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-04-15 02:33:55,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504805860] [2021-04-15 02:33:55,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:33:55,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:55,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:33:55,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:33:55,469 INFO L87 Difference]: Start difference. First operand 2342 states and 6782 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:56,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:56,100 INFO L93 Difference]: Finished difference Result 2452 states and 6986 transitions. [2021-04-15 02:33:56,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:33:56,101 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:56,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:56,104 INFO L225 Difference]: With dead ends: 2452 [2021-04-15 02:33:56,104 INFO L226 Difference]: Without dead ends: 2442 [2021-04-15 02:33:56,104 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 538.0ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:33:56,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-04-15 02:33:56,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2342. [2021-04-15 02:33:56,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2341 states have (on average 2.897052541648868) internal successors, (6782), 2341 states have internal predecessors, (6782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:56,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 6782 transitions. [2021-04-15 02:33:56,126 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 6782 transitions. Word has length 22 [2021-04-15 02:33:56,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:56,126 INFO L480 AbstractCegarLoop]: Abstraction has 2342 states and 6782 transitions. [2021-04-15 02:33:56,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:56,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 6782 transitions. [2021-04-15 02:33:56,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:56,128 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:56,128 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:56,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17730 [2021-04-15 02:33:56,329 INFO L428 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:56,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:56,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1241823813, now seen corresponding path program 392 times [2021-04-15 02:33:56,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:56,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791053344] [2021-04-15 02:33:56,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:56,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791053344] [2021-04-15 02:33:56,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632694026] [2021-04-15 02:33:56,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:56,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:33:56,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:56,502 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:33:56,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:57,066 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:33:57,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:57,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:33:58,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:33:58,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:58,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:33:58,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:33:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:58,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:58,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-04-15 02:33:58,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724973671] [2021-04-15 02:33:58,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:33:58,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:58,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:33:58,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:33:58,380 INFO L87 Difference]: Start difference. First operand 2342 states and 6782 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:59,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:59,148 INFO L93 Difference]: Finished difference Result 2475 states and 7097 transitions. [2021-04-15 02:33:59,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:33:59,149 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:59,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:59,152 INFO L225 Difference]: With dead ends: 2475 [2021-04-15 02:33:59,152 INFO L226 Difference]: Without dead ends: 2459 [2021-04-15 02:33:59,152 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 565.1ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:33:59,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-04-15 02:33:59,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2381. [2021-04-15 02:33:59,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 2.9063025210084033) internal successors, (6917), 2380 states have internal predecessors, (6917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:59,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 6917 transitions. [2021-04-15 02:33:59,173 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 6917 transitions. Word has length 22 [2021-04-15 02:33:59,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:59,173 INFO L480 AbstractCegarLoop]: Abstraction has 2381 states and 6917 transitions. [2021-04-15 02:33:59,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:59,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 6917 transitions. [2021-04-15 02:33:59,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:59,175 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:59,175 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:59,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18332 [2021-04-15 02:33:59,376 INFO L428 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:59,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:59,376 INFO L82 PathProgramCache]: Analyzing trace with hash -382949283, now seen corresponding path program 393 times [2021-04-15 02:33:59,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:59,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220636206] [2021-04-15 02:33:59,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:59,524 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:59,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220636206] [2021-04-15 02:33:59,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437819791] [2021-04-15 02:33:59,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:59,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:33:59,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:59,544 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:33:59,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:00,135 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:00,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:00,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:34:00,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:01,114 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:34:01,115 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:34:01,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:34:02,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:34:02,158 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:34:02,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:34:02,159 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:34:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:02,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:02,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-04-15 02:34:02,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91434598] [2021-04-15 02:34:02,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:34:02,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:02,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:34:02,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:34:02,206 INFO L87 Difference]: Start difference. First operand 2381 states and 6917 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:02,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:02,868 INFO L93 Difference]: Finished difference Result 2516 states and 7177 transitions. [2021-04-15 02:34:02,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:34:02,869 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:02,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:02,872 INFO L225 Difference]: With dead ends: 2516 [2021-04-15 02:34:02,872 INFO L226 Difference]: Without dead ends: 2497 [2021-04-15 02:34:02,873 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 642.1ms TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:34:02,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-04-15 02:34:02,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 2379. [2021-04-15 02:34:02,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2379 states, 2378 states have (on average 2.904541631623213) internal successors, (6907), 2378 states have internal predecessors, (6907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:02,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 6907 transitions. [2021-04-15 02:34:02,896 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 6907 transitions. Word has length 22 [2021-04-15 02:34:02,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:02,896 INFO L480 AbstractCegarLoop]: Abstraction has 2379 states and 6907 transitions. [2021-04-15 02:34:02,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:02,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 6907 transitions. [2021-04-15 02:34:02,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:02,898 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:02,898 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:03,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18824,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:03,098 INFO L428 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:03,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:03,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1327664025, now seen corresponding path program 394 times [2021-04-15 02:34:03,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:03,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012656341] [2021-04-15 02:34:03,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:03,250 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:03,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012656341] [2021-04-15 02:34:03,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620092667] [2021-04-15 02:34:03,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:03,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:34:03,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:03,269 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:34:03,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:03,844 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:03,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:03,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:34:04,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:04,589 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:34:04,590 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:34:04,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:34:05,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:34:05,459 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:34:05,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:34:05,460 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:34:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:05,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:05,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-04-15 02:34:05,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454937274] [2021-04-15 02:34:05,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:34:05,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:05,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:34:05,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:34:05,509 INFO L87 Difference]: Start difference. First operand 2379 states and 6907 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:06,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:06,265 INFO L93 Difference]: Finished difference Result 2452 states and 7057 transitions. [2021-04-15 02:34:06,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:34:06,266 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:06,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:06,269 INFO L225 Difference]: With dead ends: 2452 [2021-04-15 02:34:06,269 INFO L226 Difference]: Without dead ends: 2442 [2021-04-15 02:34:06,269 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 670.2ms TimeCoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:34:06,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-04-15 02:34:06,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2381. [2021-04-15 02:34:06,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 2.9046218487394957) internal successors, (6913), 2380 states have internal predecessors, (6913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:06,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 6913 transitions. [2021-04-15 02:34:06,292 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 6913 transitions. Word has length 22 [2021-04-15 02:34:06,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:06,292 INFO L480 AbstractCegarLoop]: Abstraction has 2381 states and 6913 transitions. [2021-04-15 02:34:06,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:06,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 6913 transitions. [2021-04-15 02:34:06,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:06,294 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:06,294 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:06,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19351 [2021-04-15 02:34:06,494 INFO L428 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:06,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:06,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1415476527, now seen corresponding path program 395 times [2021-04-15 02:34:06,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:06,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662008132] [2021-04-15 02:34:06,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:06,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:34:06,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662008132] [2021-04-15 02:34:06,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327205292] [2021-04-15 02:34:06,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:06,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:34:06,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:06,645 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:34:06,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:07,215 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:07,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:07,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:34:08,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:08,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:08,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:34:08,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:34:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:08,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:08,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-04-15 02:34:08,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25025831] [2021-04-15 02:34:08,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 02:34:08,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:08,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 02:34:08,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:34:08,063 INFO L87 Difference]: Start difference. First operand 2381 states and 6913 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:08,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:08,570 INFO L93 Difference]: Finished difference Result 2422 states and 6975 transitions. [2021-04-15 02:34:08,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:34:08,571 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:08,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:08,574 INFO L225 Difference]: With dead ends: 2422 [2021-04-15 02:34:08,574 INFO L226 Difference]: Without dead ends: 2404 [2021-04-15 02:34:08,574 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 581.8ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:34:08,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-04-15 02:34:08,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2381. [2021-04-15 02:34:08,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 2.903781512605042) internal successors, (6911), 2380 states have internal predecessors, (6911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:08,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 6911 transitions. [2021-04-15 02:34:08,597 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 6911 transitions. Word has length 22 [2021-04-15 02:34:08,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:08,597 INFO L480 AbstractCegarLoop]: Abstraction has 2381 states and 6911 transitions. [2021-04-15 02:34:08,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:08,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 6911 transitions. [2021-04-15 02:34:08,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:08,599 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:08,599 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:08,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19737,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:08,799 INFO L428 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:08,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:08,799 INFO L82 PathProgramCache]: Analyzing trace with hash -660249425, now seen corresponding path program 396 times [2021-04-15 02:34:08,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:08,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225639547] [2021-04-15 02:34:08,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:08,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:08,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225639547] [2021-04-15 02:34:08,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646499267] [2021-04-15 02:34:08,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:08,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:34:08,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:08,970 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:34:08,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:09,542 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:09,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:09,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:34:10,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:10,693 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:34:10,693 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:34:10,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:34:12,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:34:12,485 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:34:12,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:34:12,486 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:34:12,531 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:12,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:12,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-04-15 02:34:12,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544417598] [2021-04-15 02:34:12,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:34:12,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:12,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:34:12,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:34:12,531 INFO L87 Difference]: Start difference. First operand 2381 states and 6911 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:13,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:13,458 INFO L93 Difference]: Finished difference Result 2517 states and 7175 transitions. [2021-04-15 02:34:13,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:34:13,459 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:13,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:13,462 INFO L225 Difference]: With dead ends: 2517 [2021-04-15 02:34:13,462 INFO L226 Difference]: Without dead ends: 2507 [2021-04-15 02:34:13,462 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 670.0ms TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 02:34:13,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-04-15 02:34:13,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2380. [2021-04-15 02:34:13,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 2379 states have (on average 2.903741067675494) internal successors, (6908), 2379 states have internal predecessors, (6908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:13,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 6908 transitions. [2021-04-15 02:34:13,486 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 6908 transitions. Word has length 22 [2021-04-15 02:34:13,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:13,486 INFO L480 AbstractCegarLoop]: Abstraction has 2380 states and 6908 transitions. [2021-04-15 02:34:13,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:13,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 6908 transitions. [2021-04-15 02:34:13,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:13,488 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:13,488 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:13,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 401 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20026 [2021-04-15 02:34:13,689 INFO L428 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:13,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:13,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1603085611, now seen corresponding path program 397 times [2021-04-15 02:34:13,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:13,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245043250] [2021-04-15 02:34:13,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:13,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245043250] [2021-04-15 02:34:13,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620793222] [2021-04-15 02:34:13,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:13,856 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:34:13,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:14,462 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:14,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:14,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:34:16,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:16,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:16,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:34:16,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:34:16,870 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:16,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:16,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-04-15 02:34:16,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385026643] [2021-04-15 02:34:16,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:34:16,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:16,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:34:16,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:34:16,870 INFO L87 Difference]: Start difference. First operand 2380 states and 6908 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:17,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:17,483 INFO L93 Difference]: Finished difference Result 2527 states and 7269 transitions. [2021-04-15 02:34:17,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:34:17,484 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:17,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:17,487 INFO L225 Difference]: With dead ends: 2527 [2021-04-15 02:34:17,487 INFO L226 Difference]: Without dead ends: 2509 [2021-04-15 02:34:17,487 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 580.0ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:34:17,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-04-15 02:34:17,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 2429. [2021-04-15 02:34:17,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2429 states, 2428 states have (on average 2.915156507413509) internal successors, (7078), 2428 states have internal predecessors, (7078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:17,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2429 states to 2429 states and 7078 transitions. [2021-04-15 02:34:17,511 INFO L78 Accepts]: Start accepts. Automaton has 2429 states and 7078 transitions. Word has length 22 [2021-04-15 02:34:17,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:17,511 INFO L480 AbstractCegarLoop]: Abstraction has 2429 states and 7078 transitions. [2021-04-15 02:34:17,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:17,511 INFO L276 IsEmpty]: Start isEmpty. Operand 2429 states and 7078 transitions. [2021-04-15 02:34:17,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:17,513 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:17,513 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:17,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20714,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:17,713 INFO L428 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:17,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:17,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1833007155, now seen corresponding path program 398 times [2021-04-15 02:34:17,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:17,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577216283] [2021-04-15 02:34:17,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:17,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:34:17,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577216283] [2021-04-15 02:34:17,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91898341] [2021-04-15 02:34:17,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:17,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:34:17,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:17,884 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:34:17,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:18,497 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:18,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:18,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:34:19,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:19,728 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:34:19,728 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:34:19,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:34:20,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:34:20,359 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:34:20,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:34:20,360 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:34:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:20,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:20,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-04-15 02:34:20,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414208515] [2021-04-15 02:34:20,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:34:20,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:20,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:34:20,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:34:20,401 INFO L87 Difference]: Start difference. First operand 2429 states and 7078 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:21,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:21,350 INFO L93 Difference]: Finished difference Result 2609 states and 7439 transitions. [2021-04-15 02:34:21,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 02:34:21,351 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:21,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:21,354 INFO L225 Difference]: With dead ends: 2609 [2021-04-15 02:34:21,354 INFO L226 Difference]: Without dead ends: 2583 [2021-04-15 02:34:21,355 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 811.8ms TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 02:34:21,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2021-04-15 02:34:21,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 2431. [2021-04-15 02:34:21,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2431 states, 2430 states have (on average 2.914814814814815) internal successors, (7083), 2430 states have internal predecessors, (7083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:21,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2431 states to 2431 states and 7083 transitions. [2021-04-15 02:34:21,379 INFO L78 Accepts]: Start accepts. Automaton has 2431 states and 7083 transitions. Word has length 22 [2021-04-15 02:34:21,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:21,379 INFO L480 AbstractCegarLoop]: Abstraction has 2431 states and 7083 transitions. [2021-04-15 02:34:21,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:21,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2431 states and 7083 transitions. [2021-04-15 02:34:21,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:21,381 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:21,381 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:21,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21574,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:21,582 INFO L428 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:21,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:21,582 INFO L82 PathProgramCache]: Analyzing trace with hash -122393847, now seen corresponding path program 399 times [2021-04-15 02:34:21,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:21,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004814093] [2021-04-15 02:34:21,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:21,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:21,740 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:21,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004814093] [2021-04-15 02:34:21,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591533415] [2021-04-15 02:34:21,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:21,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:34:21,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:21,761 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:34:21,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:22,395 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:22,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:22,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:34:24,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:24,709 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:34:24,709 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:34:24,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:34:27,385 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:34:27,404 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:34:27,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:34:27,404 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:34:27,445 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:27,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:27,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:34:27,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090947876] [2021-04-15 02:34:27,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:34:27,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:27,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:34:27,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:34:27,446 INFO L87 Difference]: Start difference. First operand 2431 states and 7083 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:28,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:28,632 INFO L93 Difference]: Finished difference Result 2675 states and 7586 transitions. [2021-04-15 02:34:28,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 02:34:28,633 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:28,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:28,636 INFO L225 Difference]: With dead ends: 2675 [2021-04-15 02:34:28,636 INFO L226 Difference]: Without dead ends: 2642 [2021-04-15 02:34:28,636 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 896.4ms TimeCoverageRelationStatistics Valid=197, Invalid=1525, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:34:28,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-04-15 02:34:28,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 2423. [2021-04-15 02:34:28,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2422 states have (on average 2.911643270024773) internal successors, (7052), 2422 states have internal predecessors, (7052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:28,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 7052 transitions. [2021-04-15 02:34:28,660 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 7052 transitions. Word has length 22 [2021-04-15 02:34:28,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:28,660 INFO L480 AbstractCegarLoop]: Abstraction has 2423 states and 7052 transitions. [2021-04-15 02:34:28,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:28,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 7052 transitions. [2021-04-15 02:34:28,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:28,663 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:28,663 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:28,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22059 [2021-04-15 02:34:28,863 INFO L428 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:28,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:28,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1367011149, now seen corresponding path program 400 times [2021-04-15 02:34:28,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:28,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335759361] [2021-04-15 02:34:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:29,023 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:29,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335759361] [2021-04-15 02:34:29,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974269418] [2021-04-15 02:34:29,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:29,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:34:29,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:29,042 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:34:29,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:29,626 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:29,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:29,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:34:30,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:30,883 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:34:30,884 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:34:30,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:34:31,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:34:31,818 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:34:31,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:34:31,819 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:34:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:31,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:31,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:34:31,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461145557] [2021-04-15 02:34:31,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:34:31,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:31,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:34:31,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:34:31,857 INFO L87 Difference]: Start difference. First operand 2423 states and 7052 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:32,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:32,717 INFO L93 Difference]: Finished difference Result 2564 states and 7348 transitions. [2021-04-15 02:34:32,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:34:32,718 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:32,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:32,721 INFO L225 Difference]: With dead ends: 2564 [2021-04-15 02:34:32,721 INFO L226 Difference]: Without dead ends: 2554 [2021-04-15 02:34:32,721 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 784.1ms TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 02:34:32,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2021-04-15 02:34:32,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 2425. [2021-04-15 02:34:32,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 2.9117161716171616) internal successors, (7058), 2424 states have internal predecessors, (7058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:32,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7058 transitions. [2021-04-15 02:34:32,745 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7058 transitions. Word has length 22 [2021-04-15 02:34:32,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:32,745 INFO L480 AbstractCegarLoop]: Abstraction has 2425 states and 7058 transitions. [2021-04-15 02:34:32,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:32,745 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7058 transitions. [2021-04-15 02:34:32,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:32,747 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:32,747 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:32,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23375,405 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:32,947 INFO L428 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:32,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:32,948 INFO L82 PathProgramCache]: Analyzing trace with hash -80298279, now seen corresponding path program 401 times [2021-04-15 02:34:32,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:32,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017118680] [2021-04-15 02:34:32,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:33,078 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:34:33,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017118680] [2021-04-15 02:34:33,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365585996] [2021-04-15 02:34:33,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:33,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:34:33,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:33,098 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:34:33,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:33,695 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:33,696 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:33,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:34:34,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:34,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:34,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:34:34,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:34:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:34,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:34,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-04-15 02:34:34,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248053792] [2021-04-15 02:34:34,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 02:34:34,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:34,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 02:34:34,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:34:34,452 INFO L87 Difference]: Start difference. First operand 2425 states and 7058 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:35,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:35,016 INFO L93 Difference]: Finished difference Result 2464 states and 7117 transitions. [2021-04-15 02:34:35,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:34:35,017 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:35,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:35,020 INFO L225 Difference]: With dead ends: 2464 [2021-04-15 02:34:35,020 INFO L226 Difference]: Without dead ends: 2446 [2021-04-15 02:34:35,020 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 599.8ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:34:35,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-04-15 02:34:35,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2425. [2021-04-15 02:34:35,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 2.911303630363036) internal successors, (7057), 2424 states have internal predecessors, (7057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:35,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7057 transitions. [2021-04-15 02:34:35,044 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7057 transitions. Word has length 22 [2021-04-15 02:34:35,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:35,044 INFO L480 AbstractCegarLoop]: Abstraction has 2425 states and 7057 transitions. [2021-04-15 02:34:35,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:35,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7057 transitions. [2021-04-15 02:34:35,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:35,046 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:35,046 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:35,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23955 [2021-04-15 02:34:35,246 INFO L428 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:35,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:35,247 INFO L82 PathProgramCache]: Analyzing trace with hash -128763657, now seen corresponding path program 402 times [2021-04-15 02:34:35,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:35,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496786683] [2021-04-15 02:34:35,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:35,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:35,382 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:35,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496786683] [2021-04-15 02:34:35,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335893346] [2021-04-15 02:34:35,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:35,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:34:35,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:35,402 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:34:35,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:35,977 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:35,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:35,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:34:37,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:38,350 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:34:38,350 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:34:38,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:34:39,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:34:39,584 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:34:39,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:34:39,585 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:34:39,629 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:39,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:39,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:34:39,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885700465] [2021-04-15 02:34:39,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:34:39,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:39,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:34:39,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:34:39,630 INFO L87 Difference]: Start difference. First operand 2425 states and 7057 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:40,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:40,387 INFO L93 Difference]: Finished difference Result 2669 states and 7612 transitions. [2021-04-15 02:34:40,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 02:34:40,388 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:40,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:40,391 INFO L225 Difference]: With dead ends: 2669 [2021-04-15 02:34:40,391 INFO L226 Difference]: Without dead ends: 2659 [2021-04-15 02:34:40,391 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 859.8ms TimeCoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 02:34:40,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2021-04-15 02:34:40,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2426. [2021-04-15 02:34:40,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2426 states, 2425 states have (on average 2.9117525773195876) internal successors, (7061), 2425 states have internal predecessors, (7061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:40,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 7061 transitions. [2021-04-15 02:34:40,415 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 7061 transitions. Word has length 22 [2021-04-15 02:34:40,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:40,415 INFO L480 AbstractCegarLoop]: Abstraction has 2426 states and 7061 transitions. [2021-04-15 02:34:40,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:40,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 7061 transitions. [2021-04-15 02:34:40,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:40,417 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:40,417 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:40,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24215 [2021-04-15 02:34:40,618 INFO L428 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:40,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:40,618 INFO L82 PathProgramCache]: Analyzing trace with hash -399035461, now seen corresponding path program 403 times [2021-04-15 02:34:40,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:40,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715208871] [2021-04-15 02:34:40,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:40,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:40,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715208871] [2021-04-15 02:34:40,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062048023] [2021-04-15 02:34:40,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:40,795 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:34:40,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:41,398 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:41,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:41,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:34:42,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:42,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:42,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:34:42,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:34:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:42,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:42,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-04-15 02:34:42,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651780376] [2021-04-15 02:34:42,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:34:42,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:42,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:34:42,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:34:42,077 INFO L87 Difference]: Start difference. First operand 2426 states and 7061 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:42,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:42,954 INFO L93 Difference]: Finished difference Result 2557 states and 7399 transitions. [2021-04-15 02:34:42,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:34:42,954 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:42,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:42,957 INFO L225 Difference]: With dead ends: 2557 [2021-04-15 02:34:42,957 INFO L226 Difference]: Without dead ends: 2541 [2021-04-15 02:34:42,957 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 580.5ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:34:42,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-04-15 02:34:42,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2477. [2021-04-15 02:34:42,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 2.9232633279483036) internal successors, (7238), 2476 states have internal predecessors, (7238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:42,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 7238 transitions. [2021-04-15 02:34:42,982 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 7238 transitions. Word has length 22 [2021-04-15 02:34:42,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:42,982 INFO L480 AbstractCegarLoop]: Abstraction has 2477 states and 7238 transitions. [2021-04-15 02:34:42,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:42,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 7238 transitions. [2021-04-15 02:34:42,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:42,985 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:42,985 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:43,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25242,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:43,185 INFO L428 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:43,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:43,185 INFO L82 PathProgramCache]: Analyzing trace with hash 459839069, now seen corresponding path program 404 times [2021-04-15 02:34:43,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:43,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654266881] [2021-04-15 02:34:43,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:43,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:43,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654266881] [2021-04-15 02:34:43,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808191993] [2021-04-15 02:34:43,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:43,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:34:43,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:43,365 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:34:43,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:43,951 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:43,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:43,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:34:45,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:45,420 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:34:45,420 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:34:45,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:34:46,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:34:46,106 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:34:46,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:34:46,107 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:34:46,156 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:46,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:46,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-04-15 02:34:46,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924366376] [2021-04-15 02:34:46,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:34:46,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:46,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:34:46,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:34:46,156 INFO L87 Difference]: Start difference. First operand 2477 states and 7238 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:47,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:47,751 INFO L93 Difference]: Finished difference Result 2676 states and 7671 transitions. [2021-04-15 02:34:47,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 02:34:47,751 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:47,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:47,754 INFO L225 Difference]: With dead ends: 2676 [2021-04-15 02:34:47,754 INFO L226 Difference]: Without dead ends: 2650 [2021-04-15 02:34:47,754 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1001.2ms TimeCoverageRelationStatistics Valid=206, Invalid=1686, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 02:34:47,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-04-15 02:34:47,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2483. [2021-04-15 02:34:47,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 2.9234488315874296) internal successors, (7256), 2482 states have internal predecessors, (7256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:47,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 7256 transitions. [2021-04-15 02:34:47,778 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 7256 transitions. Word has length 22 [2021-04-15 02:34:47,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:47,778 INFO L480 AbstractCegarLoop]: Abstraction has 2483 states and 7256 transitions. [2021-04-15 02:34:47,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:47,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 7256 transitions. [2021-04-15 02:34:47,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:47,780 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:47,781 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:47,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25480,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:47,981 INFO L428 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:47,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:47,981 INFO L82 PathProgramCache]: Analyzing trace with hash -2124514919, now seen corresponding path program 405 times [2021-04-15 02:34:47,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:47,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100500410] [2021-04-15 02:34:47,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:34:48,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100500410] [2021-04-15 02:34:48,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659796182] [2021-04-15 02:34:48,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:48,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:34:48,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:48,164 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:34:48,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:48,710 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:48,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:48,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:34:50,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:50,412 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:34:50,412 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:34:50,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:34:53,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:34:53,031 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:34:53,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:34:53,032 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:34:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:53,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:53,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-04-15 02:34:53,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246577766] [2021-04-15 02:34:53,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:34:53,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:53,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:34:53,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:34:53,073 INFO L87 Difference]: Start difference. First operand 2483 states and 7256 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:54,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:54,005 INFO L93 Difference]: Finished difference Result 2619 states and 7552 transitions. [2021-04-15 02:34:54,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 02:34:54,006 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:54,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:54,009 INFO L225 Difference]: With dead ends: 2619 [2021-04-15 02:34:54,009 INFO L226 Difference]: Without dead ends: 2609 [2021-04-15 02:34:54,009 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 777.5ms TimeCoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 02:34:54,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2021-04-15 02:34:54,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 2498. [2021-04-15 02:34:54,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 2497 states have (on average 2.924309171005206) internal successors, (7302), 2497 states have internal predecessors, (7302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:54,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 7302 transitions. [2021-04-15 02:34:54,035 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 7302 transitions. Word has length 22 [2021-04-15 02:34:54,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:54,035 INFO L480 AbstractCegarLoop]: Abstraction has 2498 states and 7302 transitions. [2021-04-15 02:34:54,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:54,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 7302 transitions. [2021-04-15 02:34:54,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:54,037 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:54,037 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:54,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26088 [2021-04-15 02:34:54,237 INFO L428 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:54,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:54,238 INFO L82 PathProgramCache]: Analyzing trace with hash -635109923, now seen corresponding path program 406 times [2021-04-15 02:34:54,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:54,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290159581] [2021-04-15 02:34:54,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:54,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290159581] [2021-04-15 02:34:54,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505159808] [2021-04-15 02:34:54,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:54,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:34:54,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:54,435 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:34:54,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:55,047 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:55,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:55,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:34:55,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:55,902 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:34:55,903 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:34:55,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:34:56,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:34:56,528 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:34:56,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:34:56,529 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:34:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:56,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:56,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:34:56,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764702428] [2021-04-15 02:34:56,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:34:56,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:56,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:34:56,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:34:56,569 INFO L87 Difference]: Start difference. First operand 2498 states and 7302 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:57,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:57,665 INFO L93 Difference]: Finished difference Result 2729 states and 7824 transitions. [2021-04-15 02:34:57,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 02:34:57,665 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:57,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:57,668 INFO L225 Difference]: With dead ends: 2729 [2021-04-15 02:34:57,668 INFO L226 Difference]: Without dead ends: 2700 [2021-04-15 02:34:57,668 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 999.0ms TimeCoverageRelationStatistics Valid=229, Invalid=1841, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 02:34:57,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2021-04-15 02:34:57,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 2493. [2021-04-15 02:34:57,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 2492 states have (on average 2.923354735152488) internal successors, (7285), 2492 states have internal predecessors, (7285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:57,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 7285 transitions. [2021-04-15 02:34:57,691 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 7285 transitions. Word has length 22 [2021-04-15 02:34:57,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:57,691 INFO L480 AbstractCegarLoop]: Abstraction has 2493 states and 7285 transitions. [2021-04-15 02:34:57,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:57,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 7285 transitions. [2021-04-15 02:34:57,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:57,693 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:57,693 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:57,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27310,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:57,893 INFO L428 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:57,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:57,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1708195303, now seen corresponding path program 407 times [2021-04-15 02:34:57,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:57,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308792037] [2021-04-15 02:34:57,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:58,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308792037] [2021-04-15 02:34:58,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996308635] [2021-04-15 02:34:58,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:58,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:34:58,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:58,087 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:34:58,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:58,668 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:58,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:58,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:34:59,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:59,868 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:34:59,869 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:34:59,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:35:02,788 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1751 DAG size of output: 1209 [2021-04-15 02:35:02,923 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 1751 DAG size of output: 1209 [2021-04-15 02:35:03,046 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1757 DAG size of output: 1215 [2021-04-15 02:35:03,157 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 1217 DAG size of output: 1136 [2021-04-15 02:35:03,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:35:03,850 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:35:03,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:35:03,852 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:35:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:03,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:03,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:35:03,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632752888] [2021-04-15 02:35:03,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:35:03,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:03,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:35:03,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:35:03,906 INFO L87 Difference]: Start difference. First operand 2493 states and 7285 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:04,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:04,884 INFO L93 Difference]: Finished difference Result 2656 states and 7653 transitions. [2021-04-15 02:35:04,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:35:04,885 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:35:04,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:04,888 INFO L225 Difference]: With dead ends: 2656 [2021-04-15 02:35:04,888 INFO L226 Difference]: Without dead ends: 2646 [2021-04-15 02:35:04,889 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 974.6ms TimeCoverageRelationStatistics Valid=183, Invalid=1539, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:35:04,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-04-15 02:35:04,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2494. [2021-04-15 02:35:04,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 2493 states have (on average 2.923385479342158) internal successors, (7288), 2493 states have internal predecessors, (7288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:04,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 7288 transitions. [2021-04-15 02:35:04,914 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 7288 transitions. Word has length 22 [2021-04-15 02:35:04,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:04,914 INFO L480 AbstractCegarLoop]: Abstraction has 2494 states and 7288 transitions. [2021-04-15 02:35:04,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:04,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 7288 transitions. [2021-04-15 02:35:04,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:35:04,916 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:04,916 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:05,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27674 [2021-04-15 02:35:05,117 INFO L428 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:05,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:05,117 INFO L82 PathProgramCache]: Analyzing trace with hash 18563529, now seen corresponding path program 408 times [2021-04-15 02:35:05,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:05,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686979230] [2021-04-15 02:35:05,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:35:05,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686979230] [2021-04-15 02:35:05,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446968594] [2021-04-15 02:35:05,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:05,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:35:05,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:05,324 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:35:05,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:05,976 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:35:05,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:05,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:35:06,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:35:07,109 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:35:07,110 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:35:07,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:35:08,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:35:08,078 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:35:08,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:35:08,079 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:35:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:08,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:08,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-04-15 02:35:08,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194476855] [2021-04-15 02:35:08,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:35:08,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:08,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:35:08,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:35:08,117 INFO L87 Difference]: Start difference. First operand 2494 states and 7288 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:09,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:09,482 INFO L93 Difference]: Finished difference Result 2719 states and 7749 transitions. [2021-04-15 02:35:09,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 02:35:09,483 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:35:09,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:09,486 INFO L225 Difference]: With dead ends: 2719 [2021-04-15 02:35:09,486 INFO L226 Difference]: Without dead ends: 2697 [2021-04-15 02:35:09,487 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1008.1ms TimeCoverageRelationStatistics Valid=202, Invalid=1690, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 02:35:09,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2697 states. [2021-04-15 02:35:09,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2697 to 2493. [2021-04-15 02:35:09,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 2492 states have (on average 2.92215088282504) internal successors, (7282), 2492 states have internal predecessors, (7282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:09,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 7282 transitions. [2021-04-15 02:35:09,513 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 7282 transitions. Word has length 22 [2021-04-15 02:35:09,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:09,513 INFO L480 AbstractCegarLoop]: Abstraction has 2493 states and 7282 transitions. [2021-04-15 02:35:09,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:09,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 7282 transitions. [2021-04-15 02:35:09,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:35:09,515 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:09,515 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:09,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29015,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:09,716 INFO L428 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:09,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:09,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1507968525, now seen corresponding path program 409 times [2021-04-15 02:35:09,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:09,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194583466] [2021-04-15 02:35:09,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:09,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194583466] [2021-04-15 02:35:09,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864025817] [2021-04-15 02:35:09,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:09,939 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:35:09,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:10,513 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:35:10,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:10,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:35:12,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:35:13,285 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:35:13,285 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:35:13,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:35:14,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:35:14,265 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:35:14,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:35:14,266 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:35:14,316 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:14,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:14,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:35:14,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413781420] [2021-04-15 02:35:14,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:35:14,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:14,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:35:14,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:35:14,317 INFO L87 Difference]: Start difference. First operand 2493 states and 7282 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:15,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:15,620 INFO L93 Difference]: Finished difference Result 2781 states and 7913 transitions. [2021-04-15 02:35:15,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 02:35:15,621 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:35:15,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:15,624 INFO L225 Difference]: With dead ends: 2781 [2021-04-15 02:35:15,624 INFO L226 Difference]: Without dead ends: 2752 [2021-04-15 02:35:15,624 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1077.8ms TimeCoverageRelationStatistics Valid=248, Invalid=1914, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 02:35:15,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2021-04-15 02:35:15,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 2480. [2021-04-15 02:35:15,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2480 states, 2479 states have (on average 2.919322307382009) internal successors, (7237), 2479 states have internal predecessors, (7237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:15,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2480 states to 2480 states and 7237 transitions. [2021-04-15 02:35:15,649 INFO L78 Accepts]: Start accepts. Automaton has 2480 states and 7237 transitions. Word has length 22 [2021-04-15 02:35:15,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:15,650 INFO L480 AbstractCegarLoop]: Abstraction has 2480 states and 7237 transitions. [2021-04-15 02:35:15,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:15,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2480 states and 7237 transitions. [2021-04-15 02:35:15,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:35:15,652 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:15,652 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:15,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29525 [2021-04-15 02:35:15,852 INFO L428 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:15,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:15,853 INFO L82 PathProgramCache]: Analyzing trace with hash 434883145, now seen corresponding path program 410 times [2021-04-15 02:35:15,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:15,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231180134] [2021-04-15 02:35:15,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:16,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231180134] [2021-04-15 02:35:16,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866956989] [2021-04-15 02:35:16,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:16,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:35:16,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:16,068 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:35:16,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:16,691 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:35:16,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:16,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:35:19,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:35:20,004 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:35:20,005 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:35:20,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:35:20,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:35:20,552 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:35:20,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:35:20,553 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:35:20,592 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:20,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:20,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:35:20,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103343039] [2021-04-15 02:35:20,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:35:20,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:20,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:35:20,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:35:20,593 INFO L87 Difference]: Start difference. First operand 2480 states and 7237 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:21,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:21,683 INFO L93 Difference]: Finished difference Result 2723 states and 7787 transitions. [2021-04-15 02:35:21,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:35:21,685 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:35:21,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:21,688 INFO L225 Difference]: With dead ends: 2723 [2021-04-15 02:35:21,688 INFO L226 Difference]: Without dead ends: 2713 [2021-04-15 02:35:21,688 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1026.4ms TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 02:35:21,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-04-15 02:35:21,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2482. [2021-04-15 02:35:21,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2482 states, 2481 states have (on average 2.9185812172511083) internal successors, (7241), 2481 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:21,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 7241 transitions. [2021-04-15 02:35:21,713 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 7241 transitions. Word has length 22 [2021-04-15 02:35:21,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:21,713 INFO L480 AbstractCegarLoop]: Abstraction has 2482 states and 7241 transitions. [2021-04-15 02:35:21,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:21,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 7241 transitions. [2021-04-15 02:35:21,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:35:21,715 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:21,715 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:21,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30299 [2021-04-15 02:35:21,916 INFO L428 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:21,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:21,916 INFO L82 PathProgramCache]: Analyzing trace with hash -832574033, now seen corresponding path program 411 times [2021-04-15 02:35:21,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:21,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894405873] [2021-04-15 02:35:21,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:22,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894405873] [2021-04-15 02:35:22,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633978809] [2021-04-15 02:35:22,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:22,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:35:22,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:22,173 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:35:22,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:22,786 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:35:22,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:22,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:35:23,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:35:24,167 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:35:24,168 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:35:24,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:35:26,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:35:26,509 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:35:26,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:35:26,510 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:35:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:26,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:26,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:35:26,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890604444] [2021-04-15 02:35:26,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:35:26,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:26,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:35:26,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:35:26,550 INFO L87 Difference]: Start difference. First operand 2482 states and 7241 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:27,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:27,893 INFO L93 Difference]: Finished difference Result 2895 states and 8241 transitions. [2021-04-15 02:35:27,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 02:35:27,894 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:35:27,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:27,897 INFO L225 Difference]: With dead ends: 2895 [2021-04-15 02:35:27,898 INFO L226 Difference]: Without dead ends: 2885 [2021-04-15 02:35:27,898 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1194.2ms TimeCoverageRelationStatistics Valid=254, Invalid=2098, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 02:35:27,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2021-04-15 02:35:27,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2483. [2021-04-15 02:35:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 2.91941982272361) internal successors, (7246), 2482 states have internal predecessors, (7246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:27,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 7246 transitions. [2021-04-15 02:35:27,922 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 7246 transitions. Word has length 22 [2021-04-15 02:35:27,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:27,922 INFO L480 AbstractCegarLoop]: Abstraction has 2483 states and 7246 transitions. [2021-04-15 02:35:27,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:27,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 7246 transitions. [2021-04-15 02:35:27,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:35:27,924 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:27,924 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:28,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31248 [2021-04-15 02:35:28,125 INFO L428 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:28,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:28,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1959720747, now seen corresponding path program 412 times [2021-04-15 02:35:28,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:28,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033509824] [2021-04-15 02:35:28,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:28,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033509824] [2021-04-15 02:35:28,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721252730] [2021-04-15 02:35:28,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:28,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:35:28,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:28,277 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:35:28,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:28,984 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:35:28,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:28,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:35:30,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:35:30,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:30,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:35:30,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:35:30,740 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:30,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:30,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-04-15 02:35:30,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388958072] [2021-04-15 02:35:30,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:35:30,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:30,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:35:30,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:35:30,741 INFO L87 Difference]: Start difference. First operand 2483 states and 7246 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:31,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:31,848 INFO L93 Difference]: Finished difference Result 2645 states and 7685 transitions. [2021-04-15 02:35:31,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:35:31,849 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:35:31,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:31,852 INFO L225 Difference]: With dead ends: 2645 [2021-04-15 02:35:31,852 INFO L226 Difference]: Without dead ends: 2627 [2021-04-15 02:35:31,852 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 642.2ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:35:31,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2627 states. [2021-04-15 02:35:31,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2627 to 2561. [2021-04-15 02:35:31,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 2.933984375) internal successors, (7511), 2560 states have internal predecessors, (7511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:31,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 7511 transitions. [2021-04-15 02:35:31,877 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 7511 transitions. Word has length 22 [2021-04-15 02:35:31,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:31,877 INFO L480 AbstractCegarLoop]: Abstraction has 2561 states and 7511 transitions. [2021-04-15 02:35:31,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:31,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 7511 transitions. [2021-04-15 02:35:31,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:35:31,879 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:31,879 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:32,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32172,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:32,080 INFO L428 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:32,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:32,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1476372019, now seen corresponding path program 413 times [2021-04-15 02:35:32,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:32,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082629675] [2021-04-15 02:35:32,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:35:32,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082629675] [2021-04-15 02:35:32,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163711254] [2021-04-15 02:35:32,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:32,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:35:32,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:32,263 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:35:32,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:32,927 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:35:32,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:32,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:35:33,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:35:34,136 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:35:34,136 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:35:34,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:35:35,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:35:35,243 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:35:35,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:35:35,245 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:35:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:35,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:35,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-04-15 02:35:35,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737295346] [2021-04-15 02:35:35,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:35:35,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:35,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:35:35,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:35:35,305 INFO L87 Difference]: Start difference. First operand 2561 states and 7511 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:37,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:37,375 INFO L93 Difference]: Finished difference Result 2850 states and 8157 transitions. [2021-04-15 02:35:37,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-15 02:35:37,376 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:35:37,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:37,380 INFO L225 Difference]: With dead ends: 2850 [2021-04-15 02:35:37,380 INFO L226 Difference]: Without dead ends: 2817 [2021-04-15 02:35:37,380 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1259.0ms TimeCoverageRelationStatistics Valid=289, Invalid=2261, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 02:35:37,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2021-04-15 02:35:37,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2572. [2021-04-15 02:35:37,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2572 states, 2571 states have (on average 2.9362115908206925) internal successors, (7549), 2571 states have internal predecessors, (7549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:37,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2572 states to 2572 states and 7549 transitions. [2021-04-15 02:35:37,407 INFO L78 Accepts]: Start accepts. Automaton has 2572 states and 7549 transitions. Word has length 22 [2021-04-15 02:35:37,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:37,407 INFO L480 AbstractCegarLoop]: Abstraction has 2572 states and 7549 transitions. [2021-04-15 02:35:37,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:37,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2572 states and 7549 transitions. [2021-04-15 02:35:37,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:35:37,410 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:37,410 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:37,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32842,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:37,610 INFO L428 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:37,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:37,611 INFO L82 PathProgramCache]: Analyzing trace with hash 234241289, now seen corresponding path program 414 times [2021-04-15 02:35:37,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:37,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140613214] [2021-04-15 02:35:37,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:37,804 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:37,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140613214] [2021-04-15 02:35:37,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868263978] [2021-04-15 02:35:37,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:37,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:35:37,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:37,824 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:35:37,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:38,452 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:35:38,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:38,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:35:39,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:35:39,572 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:35:39,573 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:35:39,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:35:40,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:35:40,175 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:35:40,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:35:40,176 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:35:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:40,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:40,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:35:40,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078974480] [2021-04-15 02:35:40,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:35:40,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:40,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:35:40,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:35:40,233 INFO L87 Difference]: Start difference. First operand 2572 states and 7549 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:42,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:42,713 INFO L93 Difference]: Finished difference Result 3018 states and 8552 transitions. [2021-04-15 02:35:42,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-04-15 02:35:42,714 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:35:42,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:42,717 INFO L225 Difference]: With dead ends: 3018 [2021-04-15 02:35:42,717 INFO L226 Difference]: Without dead ends: 2971 [2021-04-15 02:35:42,718 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 1542.9ms TimeCoverageRelationStatistics Valid=359, Invalid=2721, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 02:35:42,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2971 states. [2021-04-15 02:35:42,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2971 to 2579. [2021-04-15 02:35:42,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2579 states, 2578 states have (on average 2.933281613653995) internal successors, (7562), 2578 states have internal predecessors, (7562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:42,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2579 states to 2579 states and 7562 transitions. [2021-04-15 02:35:42,742 INFO L78 Accepts]: Start accepts. Automaton has 2579 states and 7562 transitions. Word has length 22 [2021-04-15 02:35:42,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:42,742 INFO L480 AbstractCegarLoop]: Abstraction has 2579 states and 7562 transitions. [2021-04-15 02:35:42,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:42,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2579 states and 7562 transitions. [2021-04-15 02:35:42,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:35:42,745 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:42,745 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:42,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33450 [2021-04-15 02:35:42,945 INFO L428 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:42,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:42,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1723646285, now seen corresponding path program 415 times [2021-04-15 02:35:42,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:42,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465997844] [2021-04-15 02:35:42,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:35:43,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465997844] [2021-04-15 02:35:43,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227933568] [2021-04-15 02:35:43,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:43,166 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:35:43,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:43,790 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:35:43,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:43,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:35:44,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:35:44,886 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:35:44,887 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:35:44,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:35:45,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:35:45,453 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:35:45,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:35:45,454 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:35:45,493 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:45,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:45,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:35:45,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683546076] [2021-04-15 02:35:45,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:35:45,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:45,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:35:45,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:35:45,494 INFO L87 Difference]: Start difference. First operand 2579 states and 7562 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:46,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:46,954 INFO L93 Difference]: Finished difference Result 2793 states and 8044 transitions. [2021-04-15 02:35:46,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 02:35:46,955 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:35:46,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:46,958 INFO L225 Difference]: With dead ends: 2793 [2021-04-15 02:35:46,958 INFO L226 Difference]: Without dead ends: 2778 [2021-04-15 02:35:46,958 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1187.6ms TimeCoverageRelationStatistics Valid=243, Invalid=2013, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 02:35:46,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2021-04-15 02:35:46,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 2592. [2021-04-15 02:35:46,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 2.932458510227711) internal successors, (7598), 2591 states have internal predecessors, (7598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:46,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 7598 transitions. [2021-04-15 02:35:46,984 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 7598 transitions. Word has length 22 [2021-04-15 02:35:46,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:46,984 INFO L480 AbstractCegarLoop]: Abstraction has 2592 states and 7598 transitions. [2021-04-15 02:35:46,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:46,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 7598 transitions. [2021-04-15 02:35:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:35:46,986 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:46,987 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:47,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33830 [2021-04-15 02:35:47,187 INFO L428 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:47,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:47,187 INFO L82 PathProgramCache]: Analyzing trace with hash 650560905, now seen corresponding path program 416 times [2021-04-15 02:35:47,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:47,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421034540] [2021-04-15 02:35:47,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:47,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421034540] [2021-04-15 02:35:47,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004997865] [2021-04-15 02:35:47,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:47,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:35:47,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:47,409 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:35:47,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:48,062 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:35:48,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:48,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:35:49,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:35:50,169 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:35:50,169 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:35:50,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:35:51,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:35:51,049 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:35:51,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:35:51,050 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:35:51,106 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:51,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:51,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:35:51,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640907194] [2021-04-15 02:35:51,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:35:51,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:51,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:35:51,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:35:51,107 INFO L87 Difference]: Start difference. First operand 2592 states and 7598 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:52,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:52,424 INFO L93 Difference]: Finished difference Result 2874 states and 8265 transitions. [2021-04-15 02:35:52,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 02:35:52,425 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:35:52,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:52,429 INFO L225 Difference]: With dead ends: 2874 [2021-04-15 02:35:52,429 INFO L226 Difference]: Without dead ends: 2852 [2021-04-15 02:35:52,429 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1332.9ms TimeCoverageRelationStatistics Valid=269, Invalid=2083, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 02:35:52,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2021-04-15 02:35:52,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 2592. [2021-04-15 02:35:52,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 2.934002315708221) internal successors, (7602), 2591 states have internal predecessors, (7602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:52,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 7602 transitions. [2021-04-15 02:35:52,457 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 7602 transitions. Word has length 22 [2021-04-15 02:35:52,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:52,457 INFO L480 AbstractCegarLoop]: Abstraction has 2592 states and 7602 transitions. [2021-04-15 02:35:52,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:52,457 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 7602 transitions. [2021-04-15 02:35:52,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:35:52,459 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:52,460 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:52,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34200 [2021-04-15 02:35:52,660 INFO L428 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:52,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:52,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1744652493, now seen corresponding path program 417 times [2021-04-15 02:35:52,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:52,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178993147] [2021-04-15 02:35:52,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:52,818 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:52,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178993147] [2021-04-15 02:35:52,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279254531] [2021-04-15 02:35:52,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:52,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:35:52,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:52,840 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:35:52,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:53,573 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:35:53,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:53,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:35:54,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:35:54,918 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:35:54,919 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:35:54,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:35:56,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:35:56,089 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:35:56,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:35:56,089 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:35:56,129 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:56,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:56,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:35:56,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489852528] [2021-04-15 02:35:56,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:35:56,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:56,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:35:56,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:35:56,129 INFO L87 Difference]: Start difference. First operand 2592 states and 7602 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:57,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:57,168 INFO L93 Difference]: Finished difference Result 2811 states and 8117 transitions. [2021-04-15 02:35:57,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 02:35:57,169 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:35:57,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:57,172 INFO L225 Difference]: With dead ends: 2811 [2021-04-15 02:35:57,173 INFO L226 Difference]: Without dead ends: 2801 [2021-04-15 02:35:57,173 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1169.8ms TimeCoverageRelationStatistics Valid=236, Invalid=1834, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 02:35:57,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2021-04-15 02:35:57,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2592. [2021-04-15 02:35:57,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 2.934002315708221) internal successors, (7602), 2591 states have internal predecessors, (7602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:57,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 7602 transitions. [2021-04-15 02:35:57,198 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 7602 transitions. Word has length 22 [2021-04-15 02:35:57,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:57,198 INFO L480 AbstractCegarLoop]: Abstraction has 2592 states and 7602 transitions. [2021-04-15 02:35:57,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:57,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 7602 transitions. [2021-04-15 02:35:57,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:35:57,200 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:57,200 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:57,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34959,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:57,401 INFO L428 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:57,401 INFO L82 PathProgramCache]: Analyzing trace with hash -560398563, now seen corresponding path program 418 times [2021-04-15 02:35:57,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:57,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299080586] [2021-04-15 02:35:57,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:57,595 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:35:57,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299080586] [2021-04-15 02:35:57,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167815323] [2021-04-15 02:35:57,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:57,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:35:57,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:57,614 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:35:57,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:58,231 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:35:58,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:58,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:36:00,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:36:00,800 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:36:00,800 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:36:00,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:36:02,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:36:02,388 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:36:02,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:36:02,389 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:36:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:02,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:02,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:36:02,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435276780] [2021-04-15 02:36:02,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:36:02,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:02,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:36:02,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:36:02,428 INFO L87 Difference]: Start difference. First operand 2592 states and 7602 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:04,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:04,032 INFO L93 Difference]: Finished difference Result 3052 states and 8624 transitions. [2021-04-15 02:36:04,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 02:36:04,032 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:36:04,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:04,036 INFO L225 Difference]: With dead ends: 3052 [2021-04-15 02:36:04,036 INFO L226 Difference]: Without dead ends: 3011 [2021-04-15 02:36:04,036 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1384.9ms TimeCoverageRelationStatistics Valid=348, Invalid=2732, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 02:36:04,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3011 states. [2021-04-15 02:36:04,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3011 to 2594. [2021-04-15 02:36:04,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2593 states have (on average 2.9298110296953337) internal successors, (7597), 2593 states have internal predecessors, (7597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:04,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 7597 transitions. [2021-04-15 02:36:04,063 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 7597 transitions. Word has length 22 [2021-04-15 02:36:04,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:04,063 INFO L480 AbstractCegarLoop]: Abstraction has 2594 states and 7597 transitions. [2021-04-15 02:36:04,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:04,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 7597 transitions. [2021-04-15 02:36:04,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:36:04,065 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:04,065 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:04,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35575 [2021-04-15 02:36:04,266 INFO L428 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:04,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:04,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1633483943, now seen corresponding path program 419 times [2021-04-15 02:36:04,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:04,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274809367] [2021-04-15 02:36:04,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:04,488 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:04,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274809367] [2021-04-15 02:36:04,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844670732] [2021-04-15 02:36:04,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:04,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:36:04,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:04,511 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:36:04,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:05,151 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:36:05,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:36:05,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:36:06,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:36:07,126 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:36:07,126 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:36:07,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:36:07,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:36:07,593 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:36:07,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:36:07,594 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:36:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:07,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:07,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:36:07,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557222] [2021-04-15 02:36:07,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:36:07,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:07,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:36:07,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:36:07,635 INFO L87 Difference]: Start difference. First operand 2594 states and 7597 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:09,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:09,085 INFO L93 Difference]: Finished difference Result 3138 states and 8959 transitions. [2021-04-15 02:36:09,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 02:36:09,086 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:36:09,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:09,090 INFO L225 Difference]: With dead ends: 3138 [2021-04-15 02:36:09,090 INFO L226 Difference]: Without dead ends: 3107 [2021-04-15 02:36:09,090 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1366.2ms TimeCoverageRelationStatistics Valid=313, Invalid=2443, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 02:36:09,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2021-04-15 02:36:09,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 2554. [2021-04-15 02:36:09,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2554 states, 2553 states have (on average 2.928319623971798) internal successors, (7476), 2553 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:09,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 7476 transitions. [2021-04-15 02:36:09,119 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 7476 transitions. Word has length 22 [2021-04-15 02:36:09,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:09,119 INFO L480 AbstractCegarLoop]: Abstraction has 2554 states and 7476 transitions. [2021-04-15 02:36:09,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:09,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 7476 transitions. [2021-04-15 02:36:09,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:36:09,121 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:09,121 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:09,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36693,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:09,322 INFO L428 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:09,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:09,322 INFO L82 PathProgramCache]: Analyzing trace with hash -539392355, now seen corresponding path program 420 times [2021-04-15 02:36:09,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:09,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137154662] [2021-04-15 02:36:09,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:09,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137154662] [2021-04-15 02:36:09,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976386315] [2021-04-15 02:36:09,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:09,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:36:09,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:09,499 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:36:09,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:10,148 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:36:10,149 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:36:10,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:36:11,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:36:12,432 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:36:12,432 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:36:12,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:36:13,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:36:13,163 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:36:13,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:36:13,164 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:36:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:13,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:13,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:36:13,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956357845] [2021-04-15 02:36:13,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:36:13,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:13,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:36:13,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:36:13,206 INFO L87 Difference]: Start difference. First operand 2554 states and 7476 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:14,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:14,361 INFO L93 Difference]: Finished difference Result 3000 states and 8594 transitions. [2021-04-15 02:36:14,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:36:14,362 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:36:14,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:14,365 INFO L225 Difference]: With dead ends: 3000 [2021-04-15 02:36:14,365 INFO L226 Difference]: Without dead ends: 2990 [2021-04-15 02:36:14,365 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1229.8ms TimeCoverageRelationStatistics Valid=252, Invalid=2004, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 02:36:14,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2990 states. [2021-04-15 02:36:14,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2990 to 2556. [2021-04-15 02:36:14,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2556 states, 2555 states have (on average 2.9287671232876713) internal successors, (7483), 2555 states have internal predecessors, (7483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:14,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2556 states to 2556 states and 7483 transitions. [2021-04-15 02:36:14,389 INFO L78 Accepts]: Start accepts. Automaton has 2556 states and 7483 transitions. Word has length 22 [2021-04-15 02:36:14,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:14,389 INFO L480 AbstractCegarLoop]: Abstraction has 2556 states and 7483 transitions. [2021-04-15 02:36:14,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:14,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2556 states and 7483 transitions. [2021-04-15 02:36:14,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:36:14,391 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:14,391 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:14,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37229 [2021-04-15 02:36:14,593 INFO L428 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:14,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:14,594 INFO L82 PathProgramCache]: Analyzing trace with hash -2125188711, now seen corresponding path program 421 times [2021-04-15 02:36:14,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:14,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851729648] [2021-04-15 02:36:14,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:14,771 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:36:14,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851729648] [2021-04-15 02:36:14,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699762029] [2021-04-15 02:36:14,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:14,790 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:36:14,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:15,406 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:36:15,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:36:15,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:36:16,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:36:16,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:36:16,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:36:16,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:36:16,227 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:16,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:16,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-04-15 02:36:16,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454220720] [2021-04-15 02:36:16,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 02:36:16,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:16,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 02:36:16,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:36:16,228 INFO L87 Difference]: Start difference. First operand 2556 states and 7483 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:16,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:16,811 INFO L93 Difference]: Finished difference Result 2587 states and 7530 transitions. [2021-04-15 02:36:16,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:36:16,812 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:36:16,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:16,815 INFO L225 Difference]: With dead ends: 2587 [2021-04-15 02:36:16,815 INFO L226 Difference]: Without dead ends: 2569 [2021-04-15 02:36:16,816 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 630.4ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:36:16,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2021-04-15 02:36:16,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 2556. [2021-04-15 02:36:16,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2556 states, 2555 states have (on average 2.9279843444227005) internal successors, (7481), 2555 states have internal predecessors, (7481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:16,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2556 states to 2556 states and 7481 transitions. [2021-04-15 02:36:16,842 INFO L78 Accepts]: Start accepts. Automaton has 2556 states and 7481 transitions. Word has length 22 [2021-04-15 02:36:16,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:16,842 INFO L480 AbstractCegarLoop]: Abstraction has 2556 states and 7481 transitions. [2021-04-15 02:36:16,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:16,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2556 states and 7481 transitions. [2021-04-15 02:36:16,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:36:16,844 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:16,844 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:17,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37976,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:17,045 INFO L428 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:17,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:17,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1175859209, now seen corresponding path program 422 times [2021-04-15 02:36:17,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:17,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048284889] [2021-04-15 02:36:17,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:17,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:17,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048284889] [2021-04-15 02:36:17,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543490752] [2021-04-15 02:36:17,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:17,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:36:17,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:17,256 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:36:17,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:17,919 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:36:17,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:36:17,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:36:18,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:36:18,851 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:36:18,851 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:36:18,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:36:19,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:36:19,559 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:36:19,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:36:19,560 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:36:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:19,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:19,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:36:19,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225959935] [2021-04-15 02:36:19,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:36:19,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:19,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:36:19,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:36:19,602 INFO L87 Difference]: Start difference. First operand 2556 states and 7481 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:21,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:21,124 INFO L93 Difference]: Finished difference Result 3029 states and 8704 transitions. [2021-04-15 02:36:21,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 02:36:21,125 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:36:21,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:21,128 INFO L225 Difference]: With dead ends: 3029 [2021-04-15 02:36:21,128 INFO L226 Difference]: Without dead ends: 3019 [2021-04-15 02:36:21,128 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1421.5ms TimeCoverageRelationStatistics Valid=290, Invalid=2362, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 02:36:21,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-04-15 02:36:21,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 2564. [2021-04-15 02:36:21,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2564 states, 2563 states have (on average 2.928209129925868) internal successors, (7505), 2563 states have internal predecessors, (7505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:21,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 7505 transitions. [2021-04-15 02:36:21,156 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 7505 transitions. Word has length 22 [2021-04-15 02:36:21,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:21,156 INFO L480 AbstractCegarLoop]: Abstraction has 2564 states and 7505 transitions. [2021-04-15 02:36:21,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:21,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 7505 transitions. [2021-04-15 02:36:21,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:36:21,158 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:21,159 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:21,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38213,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:21,359 INFO L428 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:21,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:21,359 INFO L82 PathProgramCache]: Analyzing trace with hash 2066719163, now seen corresponding path program 423 times [2021-04-15 02:36:21,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:21,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595498131] [2021-04-15 02:36:21,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:21,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595498131] [2021-04-15 02:36:21,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010283498] [2021-04-15 02:36:21,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:21,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:36:21,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:21,571 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:36:21,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:22,238 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:36:22,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:36:22,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:36:25,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:36:25,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:36:25,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:36:25,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:36:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:25,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:25,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-04-15 02:36:25,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522567415] [2021-04-15 02:36:25,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:36:25,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:25,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:36:25,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:36:25,030 INFO L87 Difference]: Start difference. First operand 2564 states and 7505 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:25,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:25,623 INFO L93 Difference]: Finished difference Result 2711 states and 7924 transitions. [2021-04-15 02:36:25,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:36:25,624 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:36:25,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:25,627 INFO L225 Difference]: With dead ends: 2711 [2021-04-15 02:36:25,627 INFO L226 Difference]: Without dead ends: 2695 [2021-04-15 02:36:25,627 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 635.2ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:36:25,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-04-15 02:36:25,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 2645. [2021-04-15 02:36:25,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 2.9436459909228443) internal successors, (7783), 2644 states have internal predecessors, (7783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:25,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 7783 transitions. [2021-04-15 02:36:25,651 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 7783 transitions. Word has length 22 [2021-04-15 02:36:25,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:25,651 INFO L480 AbstractCegarLoop]: Abstraction has 2645 states and 7783 transitions. [2021-04-15 02:36:25,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:25,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 7783 transitions. [2021-04-15 02:36:25,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:36:25,653 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:25,653 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:25,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38590,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:25,854 INFO L428 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:25,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:25,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1369373603, now seen corresponding path program 424 times [2021-04-15 02:36:25,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:25,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929291396] [2021-04-15 02:36:25,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:26,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929291396] [2021-04-15 02:36:26,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268042659] [2021-04-15 02:36:26,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:26,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:36:26,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:26,068 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:36:26,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:26,715 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:36:26,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:36:26,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:36:28,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:36:28,850 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:36:28,850 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:36:28,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:36:30,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:36:30,314 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:36:30,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:36:30,315 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:36:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:30,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:30,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-04-15 02:36:30,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363889715] [2021-04-15 02:36:30,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:36:30,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:30,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:36:30,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:36:30,355 INFO L87 Difference]: Start difference. First operand 2645 states and 7783 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:32,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:32,487 INFO L93 Difference]: Finished difference Result 2975 states and 8581 transitions. [2021-04-15 02:36:32,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 02:36:32,488 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:36:32,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:32,492 INFO L225 Difference]: With dead ends: 2975 [2021-04-15 02:36:32,492 INFO L226 Difference]: Without dead ends: 2942 [2021-04-15 02:36:32,492 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1351.4ms TimeCoverageRelationStatistics Valid=304, Invalid=2776, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 02:36:32,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2021-04-15 02:36:32,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 2661. [2021-04-15 02:36:32,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2660 states have (on average 2.946240601503759) internal successors, (7837), 2660 states have internal predecessors, (7837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:32,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 7837 transitions. [2021-04-15 02:36:32,521 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 7837 transitions. Word has length 22 [2021-04-15 02:36:32,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:32,522 INFO L480 AbstractCegarLoop]: Abstraction has 2661 states and 7837 transitions. [2021-04-15 02:36:32,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:32,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 7837 transitions. [2021-04-15 02:36:32,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:36:32,524 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:32,524 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:32,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39416 [2021-04-15 02:36:32,725 INFO L428 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:32,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:32,725 INFO L82 PathProgramCache]: Analyzing trace with hash 341239705, now seen corresponding path program 425 times [2021-04-15 02:36:32,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:32,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027754052] [2021-04-15 02:36:32,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:32,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:36:32,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027754052] [2021-04-15 02:36:32,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425660717] [2021-04-15 02:36:32,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:32,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:36:32,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:32,893 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:36:32,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:33,623 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:36:33,623 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:36:33,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:36:34,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:36:34,550 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:36:34,550 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:36:34,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:36:37,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:36:37,103 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:36:37,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:36:37,104 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:36:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:37,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:37,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-04-15 02:36:37,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144109372] [2021-04-15 02:36:37,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:36:37,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:37,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:36:37,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:36:37,168 INFO L87 Difference]: Start difference. First operand 2661 states and 7837 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:38,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:38,754 INFO L93 Difference]: Finished difference Result 2918 states and 8462 transitions. [2021-04-15 02:36:38,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 02:36:38,755 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:36:38,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:38,758 INFO L225 Difference]: With dead ends: 2918 [2021-04-15 02:36:38,758 INFO L226 Difference]: Without dead ends: 2908 [2021-04-15 02:36:38,758 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1166.7ms TimeCoverageRelationStatistics Valid=212, Invalid=2044, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 02:36:38,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2021-04-15 02:36:38,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 2687. [2021-04-15 02:36:38,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 2.948994787788533) internal successors, (7921), 2686 states have internal predecessors, (7921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:38,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 7921 transitions. [2021-04-15 02:36:38,783 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 7921 transitions. Word has length 22 [2021-04-15 02:36:38,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:38,783 INFO L480 AbstractCegarLoop]: Abstraction has 2687 states and 7921 transitions. [2021-04-15 02:36:38,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:38,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 7921 transitions. [2021-04-15 02:36:38,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:36:38,785 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:38,785 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:38,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40333,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:38,986 INFO L428 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:38,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:38,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1830644701, now seen corresponding path program 426 times [2021-04-15 02:36:38,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:38,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134170532] [2021-04-15 02:36:38,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:39,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134170532] [2021-04-15 02:36:39,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765691297] [2021-04-15 02:36:39,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:39,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:36:39,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:39,220 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:36:39,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:39,898 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:36:39,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:36:39,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:36:41,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:36:41,508 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:36:41,508 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:36:41,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:36:43,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:36:43,992 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:36:43,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:36:43,994 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:36:44,057 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:44,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:44,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:36:44,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523121905] [2021-04-15 02:36:44,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:36:44,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:44,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:36:44,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:36:44,058 INFO L87 Difference]: Start difference. First operand 2687 states and 7921 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:45,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:45,964 INFO L93 Difference]: Finished difference Result 3155 states and 9023 transitions. [2021-04-15 02:36:45,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-04-15 02:36:45,965 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:36:45,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:45,968 INFO L225 Difference]: With dead ends: 3155 [2021-04-15 02:36:45,968 INFO L226 Difference]: Without dead ends: 3121 [2021-04-15 02:36:45,969 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1508.3ms TimeCoverageRelationStatistics Valid=325, Invalid=2867, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 02:36:45,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2021-04-15 02:36:45,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 2693. [2021-04-15 02:36:45,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2693 states, 2692 states have (on average 2.947251114413076) internal successors, (7934), 2692 states have internal predecessors, (7934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:45,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2693 states to 2693 states and 7934 transitions. [2021-04-15 02:36:45,995 INFO L78 Accepts]: Start accepts. Automaton has 2693 states and 7934 transitions. Word has length 22 [2021-04-15 02:36:45,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:45,995 INFO L480 AbstractCegarLoop]: Abstraction has 2693 states and 7934 transitions. [2021-04-15 02:36:45,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:45,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2693 states and 7934 transitions. [2021-04-15 02:36:45,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:36:45,997 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:45,997 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:46,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41138,431 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:46,198 INFO L428 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:46,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:46,198 INFO L82 PathProgramCache]: Analyzing trace with hash 757559321, now seen corresponding path program 427 times [2021-04-15 02:36:46,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:46,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3325128] [2021-04-15 02:36:46,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:36:46,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3325128] [2021-04-15 02:36:46,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044244500] [2021-04-15 02:36:46,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:46,462 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:36:46,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:47,140 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:36:47,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:36:47,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:36:48,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:36:49,276 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:36:49,276 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:36:49,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:36:50,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:36:50,447 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:36:50,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:36:50,448 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:36:50,495 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:50,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:50,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:36:50,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652748799] [2021-04-15 02:36:50,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:36:50,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:50,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:36:50,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:36:50,495 INFO L87 Difference]: Start difference. First operand 2693 states and 7934 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:51,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:51,918 INFO L93 Difference]: Finished difference Result 2902 states and 8407 transitions. [2021-04-15 02:36:51,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 02:36:51,919 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:36:51,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:51,922 INFO L225 Difference]: With dead ends: 2902 [2021-04-15 02:36:51,922 INFO L226 Difference]: Without dead ends: 2887 [2021-04-15 02:36:51,922 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1448.5ms TimeCoverageRelationStatistics Valid=280, Invalid=2270, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 02:36:51,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2021-04-15 02:36:51,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 2699. [2021-04-15 02:36:51,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 2.946256486286138) internal successors, (7949), 2698 states have internal predecessors, (7949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:51,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7949 transitions. [2021-04-15 02:36:51,947 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7949 transitions. Word has length 22 [2021-04-15 02:36:51,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:51,948 INFO L480 AbstractCegarLoop]: Abstraction has 2699 states and 7949 transitions. [2021-04-15 02:36:51,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:51,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7949 transitions. [2021-04-15 02:36:51,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:36:51,950 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:51,950 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:52,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42142 [2021-04-15 02:36:52,150 INFO L428 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:52,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:52,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1851650909, now seen corresponding path program 428 times [2021-04-15 02:36:52,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:52,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606622904] [2021-04-15 02:36:52,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:52,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606622904] [2021-04-15 02:36:52,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800924626] [2021-04-15 02:36:52,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:52,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:36:52,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:52,425 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:36:52,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:53,129 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:36:53,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:36:53,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:36:54,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:36:54,927 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:36:54,928 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:36:54,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:36:57,846 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:36:57,866 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:36:57,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:36:57,866 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:36:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:57,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:57,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:36:57,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969745523] [2021-04-15 02:36:57,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:36:57,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:57,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:36:57,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:36:57,907 INFO L87 Difference]: Start difference. First operand 2699 states and 7949 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:59,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:59,508 INFO L93 Difference]: Finished difference Result 2977 states and 8602 transitions. [2021-04-15 02:36:59,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 02:36:59,509 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:36:59,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:59,513 INFO L225 Difference]: With dead ends: 2977 [2021-04-15 02:36:59,513 INFO L226 Difference]: Without dead ends: 2962 [2021-04-15 02:36:59,513 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1538.8ms TimeCoverageRelationStatistics Valid=288, Invalid=2262, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 02:36:59,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2962 states. [2021-04-15 02:36:59,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2962 to 2699. [2021-04-15 02:36:59,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 2.9481097108969605) internal successors, (7954), 2698 states have internal predecessors, (7954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:59,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7954 transitions. [2021-04-15 02:36:59,542 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7954 transitions. Word has length 22 [2021-04-15 02:36:59,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:59,542 INFO L480 AbstractCegarLoop]: Abstraction has 2699 states and 7954 transitions. [2021-04-15 02:36:59,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:59,543 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7954 transitions. [2021-04-15 02:36:59,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:36:59,545 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:59,545 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:59,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42942,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:59,747 INFO L428 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:59,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:59,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1408751769, now seen corresponding path program 429 times [2021-04-15 02:36:59,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:59,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552558944] [2021-04-15 02:36:59,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:59,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552558944] [2021-04-15 02:36:59,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606181069] [2021-04-15 02:36:59,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:59,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:36:59,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:59,950 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:36:59,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:00,692 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:37:00,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:37:00,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:37:02,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:37:03,398 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:37:03,398 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:37:03,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:37:04,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:37:04,785 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:37:04,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:37:04,786 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:37:04,827 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:04,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:04,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:37:04,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819011015] [2021-04-15 02:37:04,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:37:04,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:04,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:37:04,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:37:04,827 INFO L87 Difference]: Start difference. First operand 2699 states and 7954 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:06,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:37:06,452 INFO L93 Difference]: Finished difference Result 2918 states and 8461 transitions. [2021-04-15 02:37:06,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 02:37:06,453 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:37:06,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:37:06,456 INFO L225 Difference]: With dead ends: 2918 [2021-04-15 02:37:06,456 INFO L226 Difference]: Without dead ends: 2908 [2021-04-15 02:37:06,456 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1567.2ms TimeCoverageRelationStatistics Valid=269, Invalid=2083, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 02:37:06,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2021-04-15 02:37:06,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 2699. [2021-04-15 02:37:06,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 2.9481097108969605) internal successors, (7954), 2698 states have internal predecessors, (7954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:06,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7954 transitions. [2021-04-15 02:37:06,486 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7954 transitions. Word has length 22 [2021-04-15 02:37:06,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:37:06,486 INFO L480 AbstractCegarLoop]: Abstraction has 2699 states and 7954 transitions. [2021-04-15 02:37:06,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:06,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7954 transitions. [2021-04-15 02:37:06,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:37:06,488 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:37:06,488 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:06,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44081,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:06,688 INFO L428 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:06,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:06,688 INFO L82 PathProgramCache]: Analyzing trace with hash 998887215, now seen corresponding path program 430 times [2021-04-15 02:37:06,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:06,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814340539] [2021-04-15 02:37:06,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:06,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:37:06,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814340539] [2021-04-15 02:37:06,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401283964] [2021-04-15 02:37:06,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:06,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:37:06,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:37:06,966 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:37:06,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:07,718 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:37:07,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:37:07,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:37:09,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:37:09,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:37:09,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:37:09,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:37:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:09,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:09,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:37:09,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414880759] [2021-04-15 02:37:09,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:37:09,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:09,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:37:09,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:37:09,154 INFO L87 Difference]: Start difference. First operand 2699 states and 7954 transitions. Second operand has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:09,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:37:09,869 INFO L93 Difference]: Finished difference Result 2738 states and 8012 transitions. [2021-04-15 02:37:09,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:37:09,870 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:37:09,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:37:09,873 INFO L225 Difference]: With dead ends: 2738 [2021-04-15 02:37:09,874 INFO L226 Difference]: Without dead ends: 2712 [2021-04-15 02:37:09,874 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 933.3ms TimeCoverageRelationStatistics Valid=125, Invalid=1281, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 02:37:09,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-04-15 02:37:09,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2699. [2021-04-15 02:37:09,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 2.946997776130467) internal successors, (7951), 2698 states have internal predecessors, (7951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:09,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7951 transitions. [2021-04-15 02:37:09,902 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7951 transitions. Word has length 22 [2021-04-15 02:37:09,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:37:09,902 INFO L480 AbstractCegarLoop]: Abstraction has 2699 states and 7951 transitions. [2021-04-15 02:37:09,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:09,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7951 transitions. [2021-04-15 02:37:09,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:37:09,904 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:37:09,904 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:10,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45012 [2021-04-15 02:37:10,105 INFO L428 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:10,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:10,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1502482099, now seen corresponding path program 431 times [2021-04-15 02:37:10,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:10,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824823379] [2021-04-15 02:37:10,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:10,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:10,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824823379] [2021-04-15 02:37:10,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560103222] [2021-04-15 02:37:10,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:10,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:37:10,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:37:10,385 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:37:10,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:11,210 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:37:11,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:37:11,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:37:12,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:37:13,034 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:37:13,034 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:37:13,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:37:14,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:37:14,636 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:37:14,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:37:14,637 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:37:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:14,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:14,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:37:14,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870187322] [2021-04-15 02:37:14,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:37:14,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:14,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:37:14,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:37:14,684 INFO L87 Difference]: Start difference. First operand 2699 states and 7951 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:16,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:37:16,426 INFO L93 Difference]: Finished difference Result 3366 states and 9748 transitions. [2021-04-15 02:37:16,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 02:37:16,428 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:37:16,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:37:16,432 INFO L225 Difference]: With dead ends: 3366 [2021-04-15 02:37:16,432 INFO L226 Difference]: Without dead ends: 3356 [2021-04-15 02:37:16,433 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1721.4ms TimeCoverageRelationStatistics Valid=309, Invalid=2447, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 02:37:16,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2021-04-15 02:37:16,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2699. [2021-04-15 02:37:16,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 2.9458858413639732) internal successors, (7948), 2698 states have internal predecessors, (7948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:16,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7948 transitions. [2021-04-15 02:37:16,467 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7948 transitions. Word has length 22 [2021-04-15 02:37:16,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:37:16,467 INFO L480 AbstractCegarLoop]: Abstraction has 2699 states and 7948 transitions. [2021-04-15 02:37:16,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:16,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7948 transitions. [2021-04-15 02:37:16,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:37:16,470 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:37:16,470 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:16,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45460,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:16,670 INFO L428 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:16,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:16,671 INFO L82 PathProgramCache]: Analyzing trace with hash 14616815, now seen corresponding path program 432 times [2021-04-15 02:37:16,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:16,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427151804] [2021-04-15 02:37:16,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:37:16,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427151804] [2021-04-15 02:37:16,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932755953] [2021-04-15 02:37:16,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:16,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:37:16,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:37:16,827 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:37:16,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:17,599 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:37:17,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:37:17,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:37:18,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:37:18,903 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:37:18,904 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:37:18,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:37:19,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:37:19,605 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:37:19,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:37:19,606 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:37:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:19,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:19,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-04-15 02:37:19,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547452947] [2021-04-15 02:37:19,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:37:19,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:19,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:37:19,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:37:19,651 INFO L87 Difference]: Start difference. First operand 2699 states and 7948 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:21,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:37:21,569 INFO L93 Difference]: Finished difference Result 3100 states and 8894 transitions. [2021-04-15 02:37:21,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 02:37:21,570 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:37:21,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:37:21,573 INFO L225 Difference]: With dead ends: 3100 [2021-04-15 02:37:21,573 INFO L226 Difference]: Without dead ends: 3078 [2021-04-15 02:37:21,574 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1347.8ms TimeCoverageRelationStatistics Valid=264, Invalid=2492, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 02:37:21,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-04-15 02:37:21,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 2707. [2021-04-15 02:37:21,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2707 states, 2706 states have (on average 2.9464153732446414) internal successors, (7973), 2706 states have internal predecessors, (7973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:21,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 7973 transitions. [2021-04-15 02:37:21,600 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 7973 transitions. Word has length 22 [2021-04-15 02:37:21,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:37:21,600 INFO L480 AbstractCegarLoop]: Abstraction has 2707 states and 7973 transitions. [2021-04-15 02:37:21,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:21,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 7973 transitions. [2021-04-15 02:37:21,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:37:21,602 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:37:21,602 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:21,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46320,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:21,802 INFO L428 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:21,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:21,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1504021811, now seen corresponding path program 433 times [2021-04-15 02:37:21,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:21,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927683552] [2021-04-15 02:37:21,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:22,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927683552] [2021-04-15 02:37:22,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939719621] [2021-04-15 02:37:22,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:22,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:22,047 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:37:22,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:22,791 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:37:22,791 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:37:22,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:37:25,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:37:25,793 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:37:25,794 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:37:25,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:37:26,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:37:26,964 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:37:26,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:37:26,965 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:37:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:27,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:27,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:37:27,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176556841] [2021-04-15 02:37:27,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:37:27,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:27,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:37:27,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:37:27,032 INFO L87 Difference]: Start difference. First operand 2707 states and 7973 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:29,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:37:29,215 INFO L93 Difference]: Finished difference Result 3336 states and 9435 transitions. [2021-04-15 02:37:29,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-04-15 02:37:29,216 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:37:29,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:37:29,220 INFO L225 Difference]: With dead ends: 3336 [2021-04-15 02:37:29,220 INFO L226 Difference]: Without dead ends: 3288 [2021-04-15 02:37:29,220 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1866.1ms TimeCoverageRelationStatistics Valid=410, Invalid=3250, Unknown=0, NotChecked=0, Total=3660 [2021-04-15 02:37:29,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2021-04-15 02:37:29,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 2710. [2021-04-15 02:37:29,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2710 states, 2709 states have (on average 2.9427833148763383) internal successors, (7972), 2709 states have internal predecessors, (7972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:29,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2710 states to 2710 states and 7972 transitions. [2021-04-15 02:37:29,249 INFO L78 Accepts]: Start accepts. Automaton has 2710 states and 7972 transitions. Word has length 22 [2021-04-15 02:37:29,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:37:29,250 INFO L480 AbstractCegarLoop]: Abstraction has 2710 states and 7972 transitions. [2021-04-15 02:37:29,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:29,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2710 states and 7972 transitions. [2021-04-15 02:37:29,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:37:29,252 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:37:29,252 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:29,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46785 [2021-04-15 02:37:29,452 INFO L428 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:29,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:29,452 INFO L82 PathProgramCache]: Analyzing trace with hash 430936431, now seen corresponding path program 434 times [2021-04-15 02:37:29,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:29,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414325442] [2021-04-15 02:37:29,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:37:29,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414325442] [2021-04-15 02:37:29,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694751114] [2021-04-15 02:37:29,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:29,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:37:29,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:37:29,667 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:37:29,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:30,369 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:37:30,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:37:30,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:37:31,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:37:31,335 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:37:31,336 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:37:31,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:37:33,004 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:37:33,025 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:37:33,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:37:33,026 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:37:33,074 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:33,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:33,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:37:33,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751511363] [2021-04-15 02:37:33,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:37:33,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:33,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:37:33,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:37:33,075 INFO L87 Difference]: Start difference. First operand 2710 states and 7972 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:34,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:37:34,602 INFO L93 Difference]: Finished difference Result 3007 states and 8651 transitions. [2021-04-15 02:37:34,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 02:37:34,604 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:37:34,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:37:34,607 INFO L225 Difference]: With dead ends: 3007 [2021-04-15 02:37:34,607 INFO L226 Difference]: Without dead ends: 2992 [2021-04-15 02:37:34,608 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1441.0ms TimeCoverageRelationStatistics Valid=299, Invalid=2353, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 02:37:34,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2021-04-15 02:37:34,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2729. [2021-04-15 02:37:34,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2729 states, 2728 states have (on average 2.941348973607038) internal successors, (8024), 2728 states have internal predecessors, (8024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2729 states to 2729 states and 8024 transitions. [2021-04-15 02:37:34,638 INFO L78 Accepts]: Start accepts. Automaton has 2729 states and 8024 transitions. Word has length 22 [2021-04-15 02:37:34,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:37:34,638 INFO L480 AbstractCegarLoop]: Abstraction has 2729 states and 8024 transitions. [2021-04-15 02:37:34,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:34,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2729 states and 8024 transitions. [2021-04-15 02:37:34,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:37:34,640 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:37:34,641 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:34,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47816,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:34,841 INFO L428 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:34,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:34,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1525028019, now seen corresponding path program 435 times [2021-04-15 02:37:34,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:34,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324177030] [2021-04-15 02:37:34,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:35,107 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:35,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324177030] [2021-04-15 02:37:35,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879746667] [2021-04-15 02:37:35,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:35,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:37:35,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:37:35,128 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:37:35,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:35,840 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:37:35,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:37:35,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:37:38,509 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 1611 DAG size of output: 853 [2021-04-15 02:37:38,632 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 1611 DAG size of output: 853 [2021-04-15 02:37:38,772 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 1616 DAG size of output: 858 [2021-04-15 02:37:40,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:37:41,289 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:37:41,290 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:37:41,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:37:43,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:37:43,188 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:37:43,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:37:43,190 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:37:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:43,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:43,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:37:43,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570444273] [2021-04-15 02:37:43,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:37:43,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:43,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:37:43,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:37:43,253 INFO L87 Difference]: Start difference. First operand 2729 states and 8024 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:45,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:37:45,058 INFO L93 Difference]: Finished difference Result 3110 states and 8920 transitions. [2021-04-15 02:37:45,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 02:37:45,060 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:37:45,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:37:45,064 INFO L225 Difference]: With dead ends: 3110 [2021-04-15 02:37:45,064 INFO L226 Difference]: Without dead ends: 3095 [2021-04-15 02:37:45,064 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1659.2ms TimeCoverageRelationStatistics Valid=307, Invalid=2345, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 02:37:45,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3095 states. [2021-04-15 02:37:45,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3095 to 2732. [2021-04-15 02:37:45,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2732 states, 2731 states have (on average 2.943610399121201) internal successors, (8039), 2731 states have internal predecessors, (8039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:45,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2732 states to 2732 states and 8039 transitions. [2021-04-15 02:37:45,095 INFO L78 Accepts]: Start accepts. Automaton has 2732 states and 8039 transitions. Word has length 22 [2021-04-15 02:37:45,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:37:45,095 INFO L480 AbstractCegarLoop]: Abstraction has 2732 states and 8039 transitions. [2021-04-15 02:37:45,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:45,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2732 states and 8039 transitions. [2021-04-15 02:37:45,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:37:45,097 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:37:45,098 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:45,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48501,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:45,298 INFO L428 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:45,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:45,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1082128879, now seen corresponding path program 436 times [2021-04-15 02:37:45,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:45,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492442805] [2021-04-15 02:37:45,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:45,465 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:45,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492442805] [2021-04-15 02:37:45,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831245418] [2021-04-15 02:37:45,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:45,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:37:45,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:37:45,484 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:37:45,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:46,123 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:37:46,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:37:46,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:37:47,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:37:48,018 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:37:48,019 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:37:48,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:37:49,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:37:49,540 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:37:49,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:37:49,541 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:37:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:49,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:49,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:37:49,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122163604] [2021-04-15 02:37:49,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:37:49,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:49,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:37:49,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:37:49,586 INFO L87 Difference]: Start difference. First operand 2732 states and 8039 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:51,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:37:51,063 INFO L93 Difference]: Finished difference Result 3038 states and 8759 transitions. [2021-04-15 02:37:51,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:37:51,064 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:37:51,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:37:51,068 INFO L225 Difference]: With dead ends: 3038 [2021-04-15 02:37:51,068 INFO L226 Difference]: Without dead ends: 3028 [2021-04-15 02:37:51,068 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1363.5ms TimeCoverageRelationStatistics Valid=288, Invalid=2162, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 02:37:51,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2021-04-15 02:37:51,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 2734. [2021-04-15 02:37:51,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2734 states, 2733 states have (on average 2.9425539699963412) internal successors, (8042), 2733 states have internal predecessors, (8042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:51,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 8042 transitions. [2021-04-15 02:37:51,099 INFO L78 Accepts]: Start accepts. Automaton has 2734 states and 8042 transitions. Word has length 22 [2021-04-15 02:37:51,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:37:51,099 INFO L480 AbstractCegarLoop]: Abstraction has 2734 states and 8042 transitions. [2021-04-15 02:37:51,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:51,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2734 states and 8042 transitions. [2021-04-15 02:37:51,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:37:51,102 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:37:51,102 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:51,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50041,441 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:51,318 INFO L428 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:51,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:51,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1328354231, now seen corresponding path program 437 times [2021-04-15 02:37:51,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:51,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773253908] [2021-04-15 02:37:51,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:37:51,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773253908] [2021-04-15 02:37:51,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841610134] [2021-04-15 02:37:51,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:51,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:37:51,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:37:51,557 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:37:51,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:52,256 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:37:52,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:37:52,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:37:53,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:37:54,051 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:37:54,051 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:37:54,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:37:58,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:37:58,235 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:37:58,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:37:58,236 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:37:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:58,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:58,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:37:58,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613712701] [2021-04-15 02:37:58,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:37:58,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:58,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:37:58,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:37:58,279 INFO L87 Difference]: Start difference. First operand 2734 states and 8042 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:00,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:38:00,734 INFO L93 Difference]: Finished difference Result 3510 states and 9948 transitions. [2021-04-15 02:38:00,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 02:38:00,736 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:38:00,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:38:00,740 INFO L225 Difference]: With dead ends: 3510 [2021-04-15 02:38:00,741 INFO L226 Difference]: Without dead ends: 3469 [2021-04-15 02:38:00,741 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 1920.0ms TimeCoverageRelationStatistics Valid=453, Invalid=3579, Unknown=0, NotChecked=0, Total=4032 [2021-04-15 02:38:00,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2021-04-15 02:38:00,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 2730. [2021-04-15 02:38:00,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2730 states, 2729 states have (on average 2.9399047270062293) internal successors, (8023), 2729 states have internal predecessors, (8023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2730 states to 2730 states and 8023 transitions. [2021-04-15 02:38:00,776 INFO L78 Accepts]: Start accepts. Automaton has 2730 states and 8023 transitions. Word has length 22 [2021-04-15 02:38:00,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:38:00,776 INFO L480 AbstractCegarLoop]: Abstraction has 2730 states and 8023 transitions. [2021-04-15 02:38:00,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:00,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2730 states and 8023 transitions. [2021-04-15 02:38:00,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:38:00,779 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:38:00,779 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:38:00,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50806,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:38:00,980 INFO L428 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:38:00,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:38:00,980 INFO L82 PathProgramCache]: Analyzing trace with hash -234262643, now seen corresponding path program 438 times [2021-04-15 02:38:00,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:38:00,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787981692] [2021-04-15 02:38:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:38:00,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:38:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:38:01,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787981692] [2021-04-15 02:38:01,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221105261] [2021-04-15 02:38:01,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:38:01,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:38:01,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:38:01,272 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:38:01,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:38:02,068 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:38:02,069 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:38:02,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:38:03,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:38:04,324 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:38:04,324 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:38:04,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:38:05,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:38:05,465 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:38:05,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:38:05,466 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:38:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:38:05,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:38:05,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 02:38:05,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108715667] [2021-04-15 02:38:05,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 02:38:05,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:38:05,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 02:38:05,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:38:05,515 INFO L87 Difference]: Start difference. First operand 2730 states and 8023 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:07,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:38:07,652 INFO L93 Difference]: Finished difference Result 3643 states and 10471 transitions. [2021-04-15 02:38:07,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 02:38:07,653 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:38:07,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:38:07,657 INFO L225 Difference]: With dead ends: 3643 [2021-04-15 02:38:07,657 INFO L226 Difference]: Without dead ends: 3610 [2021-04-15 02:38:07,657 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1949.4ms TimeCoverageRelationStatistics Valid=388, Invalid=3034, Unknown=0, NotChecked=0, Total=3422 [2021-04-15 02:38:07,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2021-04-15 02:38:07,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2622. [2021-04-15 02:38:07,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2622 states, 2621 states have (on average 2.9355207935902325) internal successors, (7694), 2621 states have internal predecessors, (7694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:07,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2622 states to 2622 states and 7694 transitions. [2021-04-15 02:38:07,700 INFO L78 Accepts]: Start accepts. Automaton has 2622 states and 7694 transitions. Word has length 22 [2021-04-15 02:38:07,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:38:07,700 INFO L480 AbstractCegarLoop]: Abstraction has 2622 states and 7694 transitions. [2021-04-15 02:38:07,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:07,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2622 states and 7694 transitions. [2021-04-15 02:38:07,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:38:07,702 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:38:07,702 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:38:07,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52078,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:38:07,902 INFO L428 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:38:07,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:38:07,904 INFO L82 PathProgramCache]: Analyzing trace with hash -677161783, now seen corresponding path program 439 times [2021-04-15 02:38:07,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:38:07,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142853786] [2021-04-15 02:38:07,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:38:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:38:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:38:08,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142853786] [2021-04-15 02:38:08,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147710036] [2021-04-15 02:38:08,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:38:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:38:08,149 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:38:08,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:38:08,850 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:38:08,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:38:08,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:38:09,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:38:09,789 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:38:09,790 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:38:09,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:38:10,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:38:10,599 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:38:10,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:38:10,600 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:38:10,647 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:38:10,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:38:10,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 02:38:10,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183572925] [2021-04-15 02:38:10,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 02:38:10,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:38:10,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 02:38:10,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:38:10,648 INFO L87 Difference]: Start difference. First operand 2622 states and 7694 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:12,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:38:12,913 INFO L93 Difference]: Finished difference Result 3243 states and 9300 transitions. [2021-04-15 02:38:12,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 02:38:12,914 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:38:12,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:38:12,918 INFO L225 Difference]: With dead ends: 3243 [2021-04-15 02:38:12,918 INFO L226 Difference]: Without dead ends: 3233 [2021-04-15 02:38:12,918 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1813.7ms TimeCoverageRelationStatistics Valid=310, Invalid=2446, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 02:38:12,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3233 states. [2021-04-15 02:38:12,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3233 to 2624. [2021-04-15 02:38:12,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 2.9363324437666796) internal successors, (7702), 2623 states have internal predecessors, (7702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:12,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 7702 transitions. [2021-04-15 02:38:12,946 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 7702 transitions. Word has length 22 [2021-04-15 02:38:12,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:38:12,946 INFO L480 AbstractCegarLoop]: Abstraction has 2624 states and 7702 transitions. [2021-04-15 02:38:12,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:12,946 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 7702 transitions. [2021-04-15 02:38:12,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:38:12,948 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:38:12,948 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:38:13,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52999 [2021-04-15 02:38:13,149 INFO L428 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:38:13,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:38:13,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1067202223, now seen corresponding path program 440 times [2021-04-15 02:38:13,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:38:13,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047971561] [2021-04-15 02:38:13,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:38:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:38:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:38:13,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047971561] [2021-04-15 02:38:13,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831624258] [2021-04-15 02:38:13,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:38:13,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:38:13,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:38:13,444 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:38:13,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:38:14,064 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:38:14,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:38:14,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:38:15,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:38:16,023 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:38:16,024 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:38:16,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:38:16,833 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:38:16,865 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:38:16,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:38:16,866 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:38:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:38:16,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:38:16,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 02:38:16,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22390141] [2021-04-15 02:38:16,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 02:38:16,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:38:16,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 02:38:16,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:38:16,932 INFO L87 Difference]: Start difference. First operand 2624 states and 7702 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:18,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:38:18,870 INFO L93 Difference]: Finished difference Result 3200 states and 9255 transitions. [2021-04-15 02:38:18,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 02:38:18,871 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:38:18,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:38:18,875 INFO L225 Difference]: With dead ends: 3200 [2021-04-15 02:38:18,875 INFO L226 Difference]: Without dead ends: 3190 [2021-04-15 02:38:18,875 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1816.9ms TimeCoverageRelationStatistics Valid=365, Invalid=2715, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 02:38:18,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2021-04-15 02:38:18,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 2692. [2021-04-15 02:38:18,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2692 states, 2691 states have (on average 2.938684503901895) internal successors, (7908), 2691 states have internal predecessors, (7908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:18,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 7908 transitions. [2021-04-15 02:38:18,902 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 7908 transitions. Word has length 22 [2021-04-15 02:38:18,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:38:18,902 INFO L480 AbstractCegarLoop]: Abstraction has 2692 states and 7908 transitions. [2021-04-15 02:38:18,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:18,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 7908 transitions. [2021-04-15 02:38:18,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:38:18,905 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:38:18,905 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:38:19,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53338 [2021-04-15 02:38:19,105 INFO L428 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:38:19,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:38:19,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1088702763, now seen corresponding path program 441 times [2021-04-15 02:38:19,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:38:19,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110002396] [2021-04-15 02:38:19,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:38:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:38:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:38:19,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110002396] [2021-04-15 02:38:19,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114609664] [2021-04-15 02:38:19,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:38:19,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:38:19,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:38:19,339 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:38:19,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:38:19,995 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:38:19,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:38:19,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:38:20,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:38:20,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:38:20,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:38:20,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:38:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:38:20,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:38:20,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-04-15 02:38:20,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724194471] [2021-04-15 02:38:20,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:38:20,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:38:20,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:38:20,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:38:20,547 INFO L87 Difference]: Start difference. First operand 2692 states and 7908 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:21,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:38:21,709 INFO L93 Difference]: Finished difference Result 2915 states and 8552 transitions. [2021-04-15 02:38:21,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:38:21,710 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:38:21,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:38:21,713 INFO L225 Difference]: With dead ends: 2915 [2021-04-15 02:38:21,714 INFO L226 Difference]: Without dead ends: 2897 [2021-04-15 02:38:21,714 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 674.3ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:38:21,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-04-15 02:38:21,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2847. [2021-04-15 02:38:21,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2846 states have (on average 2.95572733661279) internal successors, (8412), 2846 states have internal predecessors, (8412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:21,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 8412 transitions. [2021-04-15 02:38:21,740 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 8412 transitions. Word has length 22 [2021-04-15 02:38:21,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:38:21,740 INFO L480 AbstractCegarLoop]: Abstraction has 2847 states and 8412 transitions. [2021-04-15 02:38:21,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:21,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 8412 transitions. [2021-04-15 02:38:21,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:38:21,743 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:38:21,743 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:38:21,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54056,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:38:21,943 INFO L428 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:38:21,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:38:21,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1947577293, now seen corresponding path program 442 times [2021-04-15 02:38:21,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:38:21,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369604418] [2021-04-15 02:38:21,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:38:21,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:38:22,109 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:38:22,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369604418] [2021-04-15 02:38:22,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217091642] [2021-04-15 02:38:22,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:38:22,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:38:22,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:38:22,128 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:38:22,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:38:22,820 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:38:22,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:38:22,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:38:23,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:38:24,237 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:38:24,237 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:38:24,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:38:24,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:38:24,902 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:38:24,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:38:24,903 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:38:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:38:24,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:38:24,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-04-15 02:38:24,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038921484] [2021-04-15 02:38:24,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:38:24,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:38:24,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:38:24,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:38:24,948 INFO L87 Difference]: Start difference. First operand 2847 states and 8412 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:27,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:38:27,699 INFO L93 Difference]: Finished difference Result 3268 states and 9465 transitions. [2021-04-15 02:38:27,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-04-15 02:38:27,699 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:38:27,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:38:27,703 INFO L225 Difference]: With dead ends: 3268 [2021-04-15 02:38:27,703 INFO L226 Difference]: Without dead ends: 3228 [2021-04-15 02:38:27,704 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1537.5ms TimeCoverageRelationStatistics Valid=367, Invalid=3173, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 02:38:27,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2021-04-15 02:38:27,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2862. [2021-04-15 02:38:27,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 2.9598042642432714) internal successors, (8468), 2861 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:27,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 8468 transitions. [2021-04-15 02:38:27,732 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 8468 transitions. Word has length 22 [2021-04-15 02:38:27,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:38:27,732 INFO L480 AbstractCegarLoop]: Abstraction has 2862 states and 8468 transitions. [2021-04-15 02:38:27,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:27,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 8468 transitions. [2021-04-15 02:38:27,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:38:27,734 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:38:27,734 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:38:27,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54227,447 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:38:27,935 INFO L428 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:38:27,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:38:27,935 INFO L82 PathProgramCache]: Analyzing trace with hash -636776695, now seen corresponding path program 443 times [2021-04-15 02:38:27,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:38:27,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379525947] [2021-04-15 02:38:27,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:38:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:38:28,140 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:38:28,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379525947] [2021-04-15 02:38:28,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137993031] [2021-04-15 02:38:28,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:38:28,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:38:28,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:38:28,181 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:38:28,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:38:28,851 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:38:28,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:38:28,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:38:29,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:38:29,959 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:38:29,960 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:38:29,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:38:30,400 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:38:30,421 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:38:30,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:38:30,422 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:38:30,465 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:38:30,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:38:30,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:38:30,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513835553] [2021-04-15 02:38:30,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:38:30,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:38:30,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:38:30,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:38:30,466 INFO L87 Difference]: Start difference. First operand 2862 states and 8468 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:33,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:38:33,106 INFO L93 Difference]: Finished difference Result 3624 states and 10394 transitions. [2021-04-15 02:38:33,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-04-15 02:38:33,107 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:38:33,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:38:33,111 INFO L225 Difference]: With dead ends: 3624 [2021-04-15 02:38:33,111 INFO L226 Difference]: Without dead ends: 3563 [2021-04-15 02:38:33,112 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 1771.1ms TimeCoverageRelationStatistics Valid=541, Invalid=4289, Unknown=0, NotChecked=0, Total=4830 [2021-04-15 02:38:33,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2021-04-15 02:38:33,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 2882. [2021-04-15 02:38:33,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2882 states, 2881 states have (on average 2.9597362027073935) internal successors, (8527), 2881 states have internal predecessors, (8527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:33,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2882 states to 2882 states and 8527 transitions. [2021-04-15 02:38:33,141 INFO L78 Accepts]: Start accepts. Automaton has 2882 states and 8527 transitions. Word has length 22 [2021-04-15 02:38:33,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:38:33,141 INFO L480 AbstractCegarLoop]: Abstraction has 2882 states and 8527 transitions. [2021-04-15 02:38:33,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:33,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2882 states and 8527 transitions. [2021-04-15 02:38:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:38:33,144 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:38:33,144 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:38:33,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54711,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:38:33,344 INFO L428 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:38:33,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:38:33,345 INFO L82 PathProgramCache]: Analyzing trace with hash 852628301, now seen corresponding path program 444 times [2021-04-15 02:38:33,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:38:33,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200443265] [2021-04-15 02:38:33,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:38:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:38:33,577 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:38:33,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200443265] [2021-04-15 02:38:33,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079463072] [2021-04-15 02:38:33,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:38:33,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:38:33,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:38:33,598 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:38:33,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:38:34,454 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:38:34,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:38:34,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:38:35,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:38:36,089 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:38:36,090 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:38:36,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:38:38,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:38:38,127 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:38:38,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:38:38,129 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:38:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:38:38,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:38:38,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:38:38,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634537815] [2021-04-15 02:38:38,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:38:38,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:38:38,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:38:38,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:38:38,197 INFO L87 Difference]: Start difference. First operand 2882 states and 8527 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:40,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:38:40,684 INFO L93 Difference]: Finished difference Result 3383 states and 9835 transitions. [2021-04-15 02:38:40,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 02:38:40,685 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:38:40,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:38:40,689 INFO L225 Difference]: With dead ends: 3383 [2021-04-15 02:38:40,689 INFO L226 Difference]: Without dead ends: 3368 [2021-04-15 02:38:40,690 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1652.4ms TimeCoverageRelationStatistics Valid=305, Invalid=2665, Unknown=0, NotChecked=0, Total=2970 [2021-04-15 02:38:40,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2021-04-15 02:38:40,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 2956. [2021-04-15 02:38:40,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 2.964128595600677) internal successors, (8759), 2955 states have internal predecessors, (8759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:40,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 8759 transitions. [2021-04-15 02:38:40,725 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 8759 transitions. Word has length 22 [2021-04-15 02:38:40,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:38:40,726 INFO L480 AbstractCegarLoop]: Abstraction has 2956 states and 8759 transitions. [2021-04-15 02:38:40,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:40,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 8759 transitions. [2021-04-15 02:38:40,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:38:40,728 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:38:40,728 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:38:40,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55153,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:38:40,929 INFO L428 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:38:40,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:38:40,929 INFO L82 PathProgramCache]: Analyzing trace with hash -220457079, now seen corresponding path program 445 times [2021-04-15 02:38:40,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:38:40,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822219898] [2021-04-15 02:38:40,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:38:40,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:38:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:38:41,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822219898] [2021-04-15 02:38:41,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478073495] [2021-04-15 02:38:41,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:38:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:38:41,260 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:38:41,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:38:42,125 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:38:42,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:38:42,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:38:44,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:38:44,522 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:38:44,522 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:38:44,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:38:45,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:38:45,118 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:38:45,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:38:45,119 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:38:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:38:45,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:38:45,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:38:45,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630331305] [2021-04-15 02:38:45,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:38:45,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:38:45,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:38:45,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:38:45,195 INFO L87 Difference]: Start difference. First operand 2956 states and 8759 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:48,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:38:48,238 INFO L93 Difference]: Finished difference Result 3629 states and 10445 transitions. [2021-04-15 02:38:48,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-04-15 02:38:48,239 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:38:48,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:38:48,243 INFO L225 Difference]: With dead ends: 3629 [2021-04-15 02:38:48,243 INFO L226 Difference]: Without dead ends: 3597 [2021-04-15 02:38:48,244 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 2428.8ms TimeCoverageRelationStatistics Valid=456, Invalid=3834, Unknown=0, NotChecked=0, Total=4290 [2021-04-15 02:38:48,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3597 states. [2021-04-15 02:38:48,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3597 to 2955. [2021-04-15 02:38:48,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2954 states have (on average 2.9617467840216656) internal successors, (8749), 2954 states have internal predecessors, (8749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 8749 transitions. [2021-04-15 02:38:48,273 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 8749 transitions. Word has length 22 [2021-04-15 02:38:48,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:38:48,274 INFO L480 AbstractCegarLoop]: Abstraction has 2955 states and 8749 transitions. [2021-04-15 02:38:48,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:48,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 8749 transitions. [2021-04-15 02:38:48,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:38:48,276 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:38:48,276 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:38:48,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55999,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:38:48,481 INFO L428 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:38:48,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:38:48,481 INFO L82 PathProgramCache]: Analyzing trace with hash 873634509, now seen corresponding path program 446 times [2021-04-15 02:38:48,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:38:48,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658959659] [2021-04-15 02:38:48,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:38:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:38:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:38:48,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658959659] [2021-04-15 02:38:48,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53178411] [2021-04-15 02:38:48,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:38:48,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:38:48,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:38:48,816 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:38:48,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:38:49,813 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:38:49,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:38:49,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:38:50,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:38:51,463 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:38:51,464 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:38:51,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:38:54,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:38:54,560 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:38:54,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:38:54,562 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:38:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:38:54,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:38:54,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:38:54,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18905990] [2021-04-15 02:38:54,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:38:54,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:38:54,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:38:54,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:38:54,618 INFO L87 Difference]: Start difference. First operand 2955 states and 8749 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:57,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:38:57,045 INFO L93 Difference]: Finished difference Result 3260 states and 9483 transitions. [2021-04-15 02:38:57,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 02:38:57,046 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:38:57,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:38:57,051 INFO L225 Difference]: With dead ends: 3260 [2021-04-15 02:38:57,051 INFO L226 Difference]: Without dead ends: 3245 [2021-04-15 02:38:57,051 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 2385.3ms TimeCoverageRelationStatistics Valid=361, Invalid=2609, Unknown=0, NotChecked=0, Total=2970 [2021-04-15 02:38:57,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2021-04-15 02:38:57,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 2963. [2021-04-15 02:38:57,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2963 states, 2962 states have (on average 2.960837272113437) internal successors, (8770), 2962 states have internal predecessors, (8770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:57,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 8770 transitions. [2021-04-15 02:38:57,085 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 8770 transitions. Word has length 22 [2021-04-15 02:38:57,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:38:57,085 INFO L480 AbstractCegarLoop]: Abstraction has 2963 states and 8770 transitions. [2021-04-15 02:38:57,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:57,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 8770 transitions. [2021-04-15 02:38:57,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:38:57,088 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:38:57,088 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:38:57,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56654 [2021-04-15 02:38:57,289 INFO L428 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:38:57,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:38:57,289 INFO L82 PathProgramCache]: Analyzing trace with hash 430735369, now seen corresponding path program 447 times [2021-04-15 02:38:57,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:38:57,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746024410] [2021-04-15 02:38:57,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:38:57,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:38:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:38:57,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746024410] [2021-04-15 02:38:57,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491233032] [2021-04-15 02:38:57,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:38:57,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:38:57,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:38:57,649 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:38:57,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:38:58,654 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:38:58,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:38:58,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:38:59,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:38:59,545 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:38:59,546 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:38:59,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:38:59,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:39:00,015 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:39:00,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:39:00,016 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:39:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:39:00,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:39:00,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 02:39:00,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370061811] [2021-04-15 02:39:00,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 02:39:00,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:39:00,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 02:39:00,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:39:00,064 INFO L87 Difference]: Start difference. First operand 2963 states and 8770 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:02,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:39:02,711 INFO L93 Difference]: Finished difference Result 3373 states and 9785 transitions. [2021-04-15 02:39:02,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 02:39:02,713 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:39:02,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:39:02,718 INFO L225 Difference]: With dead ends: 3373 [2021-04-15 02:39:02,718 INFO L226 Difference]: Without dead ends: 3358 [2021-04-15 02:39:02,718 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 2325.8ms TimeCoverageRelationStatistics Valid=347, Invalid=2515, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 02:39:02,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3358 states. [2021-04-15 02:39:02,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3358 to 2965. [2021-04-15 02:39:02,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 2.9625506072874495) internal successors, (8781), 2964 states have internal predecessors, (8781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:02,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 8781 transitions. [2021-04-15 02:39:02,750 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 8781 transitions. Word has length 22 [2021-04-15 02:39:02,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:39:02,750 INFO L480 AbstractCegarLoop]: Abstraction has 2965 states and 8781 transitions. [2021-04-15 02:39:02,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:02,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 8781 transitions. [2021-04-15 02:39:02,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:39:02,753 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:39:02,753 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:39:02,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57554 [2021-04-15 02:39:02,953 INFO L428 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:39:02,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:39:02,954 INFO L82 PathProgramCache]: Analyzing trace with hash -414236083, now seen corresponding path program 448 times [2021-04-15 02:39:02,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:39:02,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993118051] [2021-04-15 02:39:02,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:39:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:39:03,239 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:39:03,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993118051] [2021-04-15 02:39:03,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330937519] [2021-04-15 02:39:03,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:39:03,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:39:03,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:39:03,259 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:39:03,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:39:04,220 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:39:04,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:39:04,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:39:05,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:39:06,091 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:39:06,092 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:39:06,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:39:07,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:39:07,912 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:39:07,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:39:07,914 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:39:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:39:07,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:39:07,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 02:39:07,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312827768] [2021-04-15 02:39:07,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 02:39:07,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:39:07,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 02:39:07,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:39:07,992 INFO L87 Difference]: Start difference. First operand 2965 states and 8781 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:10,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:39:10,079 INFO L93 Difference]: Finished difference Result 3250 states and 9460 transitions. [2021-04-15 02:39:10,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 02:39:10,080 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:39:10,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:39:10,083 INFO L225 Difference]: With dead ends: 3250 [2021-04-15 02:39:10,083 INFO L226 Difference]: Without dead ends: 3240 [2021-04-15 02:39:10,083 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 2037.2ms TimeCoverageRelationStatistics Valid=324, Invalid=2328, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 02:39:10,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3240 states. [2021-04-15 02:39:10,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3240 to 2965. [2021-04-15 02:39:10,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 2.9625506072874495) internal successors, (8781), 2964 states have internal predecessors, (8781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:10,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 8781 transitions. [2021-04-15 02:39:10,112 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 8781 transitions. Word has length 22 [2021-04-15 02:39:10,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:39:10,112 INFO L480 AbstractCegarLoop]: Abstraction has 2965 states and 8781 transitions. [2021-04-15 02:39:10,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:10,112 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 8781 transitions. [2021-04-15 02:39:10,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:39:10,114 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:39:10,114 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:39:10,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57851,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:39:10,315 INFO L428 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:39:10,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:39:10,315 INFO L82 PathProgramCache]: Analyzing trace with hash -536487783, now seen corresponding path program 449 times [2021-04-15 02:39:10,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:39:10,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711504205] [2021-04-15 02:39:10,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:39:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:39:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:39:10,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711504205] [2021-04-15 02:39:10,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594728785] [2021-04-15 02:39:10,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:39:10,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:39:10,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:39:10,621 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:39:10,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:39:11,486 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:39:11,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:39:11,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:39:12,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:39:12,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:39:12,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:39:12,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:39:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:39:12,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:39:12,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:39:12,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183706081] [2021-04-15 02:39:12,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:39:12,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:39:12,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:39:12,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:39:12,601 INFO L87 Difference]: Start difference. First operand 2965 states and 8781 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:14,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:39:14,136 INFO L93 Difference]: Finished difference Result 3016 states and 8861 transitions. [2021-04-15 02:39:14,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:39:14,137 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:39:14,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:39:14,140 INFO L225 Difference]: With dead ends: 3016 [2021-04-15 02:39:14,140 INFO L226 Difference]: Without dead ends: 2990 [2021-04-15 02:39:14,140 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1092.7ms TimeCoverageRelationStatistics Valid=127, Invalid=1355, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 02:39:14,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2990 states. [2021-04-15 02:39:14,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2990 to 2965. [2021-04-15 02:39:14,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 2.9612010796221324) internal successors, (8777), 2964 states have internal predecessors, (8777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:14,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 8777 transitions. [2021-04-15 02:39:14,174 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 8777 transitions. Word has length 22 [2021-04-15 02:39:14,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:39:14,174 INFO L480 AbstractCegarLoop]: Abstraction has 2965 states and 8777 transitions. [2021-04-15 02:39:14,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:14,174 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 8777 transitions. [2021-04-15 02:39:14,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:39:14,177 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:39:14,177 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:39:14,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58565 [2021-04-15 02:39:14,377 INFO L428 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:39:14,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:39:14,378 INFO L82 PathProgramCache]: Analyzing trace with hash -468172775, now seen corresponding path program 450 times [2021-04-15 02:39:14,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:39:14,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641502128] [2021-04-15 02:39:14,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:39:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:39:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:39:14,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641502128] [2021-04-15 02:39:14,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224119218] [2021-04-15 02:39:14,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:39:14,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:39:14,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:39:14,602 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:39:14,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:39:15,407 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:39:15,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:39:15,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:39:16,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:39:16,783 WARN L205 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:39:16,784 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:39:16,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:39:17,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:39:17,570 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:39:17,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:39:17,571 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:39:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:39:17,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:39:17,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 02:39:17,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605872943] [2021-04-15 02:39:17,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 02:39:17,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:39:17,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 02:39:17,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:39:17,635 INFO L87 Difference]: Start difference. First operand 2965 states and 8777 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:20,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:39:20,188 INFO L93 Difference]: Finished difference Result 3832 states and 11188 transitions. [2021-04-15 02:39:20,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 02:39:20,188 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:39:20,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:39:20,193 INFO L225 Difference]: With dead ends: 3832 [2021-04-15 02:39:20,193 INFO L226 Difference]: Without dead ends: 3822 [2021-04-15 02:39:20,193 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 2112.2ms TimeCoverageRelationStatistics Valid=400, Invalid=3140, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 02:39:20,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-04-15 02:39:20,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 2972. [2021-04-15 02:39:20,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2972 states, 2971 states have (on average 2.9619656681252104) internal successors, (8800), 2971 states have internal predecessors, (8800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:20,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2972 states to 2972 states and 8800 transitions. [2021-04-15 02:39:20,225 INFO L78 Accepts]: Start accepts. Automaton has 2972 states and 8800 transitions. Word has length 22 [2021-04-15 02:39:20,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:39:20,225 INFO L480 AbstractCegarLoop]: Abstraction has 2972 states and 8800 transitions. [2021-04-15 02:39:20,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:20,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2972 states and 8800 transitions. [2021-04-15 02:39:20,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:39:20,227 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:39:20,227 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:39:20,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58907 [2021-04-15 02:39:20,428 INFO L428 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:39:20,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:39:20,428 INFO L82 PathProgramCache]: Analyzing trace with hash -682746697, now seen corresponding path program 451 times [2021-04-15 02:39:20,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:39:20,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501282935] [2021-04-15 02:39:20,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:39:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:39:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:39:20,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501282935] [2021-04-15 02:39:20,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954865244] [2021-04-15 02:39:20,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:39:20,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:39:20,615 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:39:20,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:39:21,211 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:39:21,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:39:21,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:39:21,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:39:22,293 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:39:22,294 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:39:22,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:39:24,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:39:24,208 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:39:24,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:39:24,209 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:39:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:39:24,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:39:24,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:39:24,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569004087] [2021-04-15 02:39:24,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:39:24,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:39:24,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:39:24,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:39:24,285 INFO L87 Difference]: Start difference. First operand 2972 states and 8800 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:27,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:39:27,930 INFO L93 Difference]: Finished difference Result 3762 states and 10747 transitions. [2021-04-15 02:39:27,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-04-15 02:39:27,930 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:39:27,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:39:27,935 INFO L225 Difference]: With dead ends: 3762 [2021-04-15 02:39:27,935 INFO L226 Difference]: Without dead ends: 3707 [2021-04-15 02:39:27,936 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 2153.5ms TimeCoverageRelationStatistics Valid=499, Invalid=4057, Unknown=0, NotChecked=0, Total=4556 [2021-04-15 02:39:27,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3707 states. [2021-04-15 02:39:27,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3707 to 2980. [2021-04-15 02:39:27,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2980 states, 2979 states have (on average 2.959718026183283) internal successors, (8817), 2979 states have internal predecessors, (8817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:27,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 8817 transitions. [2021-04-15 02:39:27,969 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 8817 transitions. Word has length 22 [2021-04-15 02:39:27,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:39:27,969 INFO L480 AbstractCegarLoop]: Abstraction has 2980 states and 8817 transitions. [2021-04-15 02:39:27,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:27,969 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 8817 transitions. [2021-04-15 02:39:27,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:39:27,971 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:39:27,971 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:39:28,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59326 [2021-04-15 02:39:28,172 INFO L428 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:39:28,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:39:28,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1755832077, now seen corresponding path program 452 times [2021-04-15 02:39:28,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:39:28,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217544247] [2021-04-15 02:39:28,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:39:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:39:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:39:28,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217544247] [2021-04-15 02:39:28,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168340777] [2021-04-15 02:39:28,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:39:28,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:39:28,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:39:28,462 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:39:28,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:39:29,336 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:39:29,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:39:29,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:39:30,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:39:30,754 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:39:30,755 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:39:30,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:39:31,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:39:31,112 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:39:31,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:39:31,113 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:39:31,187 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:39:31,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:39:31,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:39:31,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224256195] [2021-04-15 02:39:31,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:39:31,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:39:31,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:39:31,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:39:31,188 INFO L87 Difference]: Start difference. First operand 2980 states and 8817 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:34,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:39:34,497 INFO L93 Difference]: Finished difference Result 3987 states and 11396 transitions. [2021-04-15 02:39:34,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-04-15 02:39:34,498 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:39:34,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:39:34,503 INFO L225 Difference]: With dead ends: 3987 [2021-04-15 02:39:34,503 INFO L226 Difference]: Without dead ends: 3932 [2021-04-15 02:39:34,504 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2692.7ms TimeCoverageRelationStatistics Valid=575, Invalid=4681, Unknown=0, NotChecked=0, Total=5256 [2021-04-15 02:39:34,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3932 states. [2021-04-15 02:39:34,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3932 to 2986. [2021-04-15 02:39:34,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 2.9591289782244554) internal successors, (8833), 2985 states have internal predecessors, (8833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:34,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 8833 transitions. [2021-04-15 02:39:34,539 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 8833 transitions. Word has length 22 [2021-04-15 02:39:34,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:39:34,539 INFO L480 AbstractCegarLoop]: Abstraction has 2986 states and 8833 transitions. [2021-04-15 02:39:34,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:34,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 8833 transitions. [2021-04-15 02:39:34,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:39:34,542 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:39:34,542 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:39:34,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60009 [2021-04-15 02:39:34,749 INFO L428 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:39:34,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:39:34,749 INFO L82 PathProgramCache]: Analyzing trace with hash -661740489, now seen corresponding path program 453 times [2021-04-15 02:39:34,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:39:34,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609197923] [2021-04-15 02:39:34,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:39:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:39:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:39:34,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609197923] [2021-04-15 02:39:34,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187827655] [2021-04-15 02:39:34,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:39:34,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:39:34,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:39:34,946 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:39:34,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:39:35,600 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:39:35,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:39:35,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:39:36,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:39:37,453 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:39:37,454 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:39:37,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:39:40,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:39:40,197 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:39:40,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:39:40,198 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:39:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:39:40,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:39:40,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:39:40,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461020202] [2021-04-15 02:39:40,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:39:40,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:39:40,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:39:40,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:39:40,274 INFO L87 Difference]: Start difference. First operand 2986 states and 8833 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:42,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:39:42,286 INFO L93 Difference]: Finished difference Result 3474 states and 10057 transitions. [2021-04-15 02:39:42,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 02:39:42,287 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:39:42,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:39:42,291 INFO L225 Difference]: With dead ends: 3474 [2021-04-15 02:39:42,291 INFO L226 Difference]: Without dead ends: 3459 [2021-04-15 02:39:42,292 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 1600.4ms TimeCoverageRelationStatistics Valid=377, Invalid=2815, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 02:39:42,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3459 states. [2021-04-15 02:39:42,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3459 to 3009. [2021-04-15 02:39:42,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 3008 states have (on average 2.95844414893617) internal successors, (8899), 3008 states have internal predecessors, (8899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:42,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 8899 transitions. [2021-04-15 02:39:42,323 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 8899 transitions. Word has length 22 [2021-04-15 02:39:42,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:39:42,323 INFO L480 AbstractCegarLoop]: Abstraction has 3009 states and 8899 transitions. [2021-04-15 02:39:42,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:42,323 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 8899 transitions. [2021-04-15 02:39:42,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:39:42,325 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:39:42,325 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:39:42,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60405 [2021-04-15 02:39:42,526 INFO L428 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:39:42,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:39:42,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1104639629, now seen corresponding path program 454 times [2021-04-15 02:39:42,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:39:42,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240833668] [2021-04-15 02:39:42,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:39:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:39:42,728 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:39:42,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240833668] [2021-04-15 02:39:42,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876619375] [2021-04-15 02:39:42,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:39:42,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:39:42,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:39:42,747 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:39:42,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:39:43,376 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:39:43,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:39:43,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:39:46,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:39:46,815 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:39:46,816 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:39:46,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:39:47,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:39:47,911 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:39:47,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:39:47,912 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:39:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:39:47,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:39:47,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 02:39:47,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342980951] [2021-04-15 02:39:47,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 02:39:47,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:39:47,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 02:39:47,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:39:47,970 INFO L87 Difference]: Start difference. First operand 3009 states and 8899 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:49,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:39:49,803 INFO L93 Difference]: Finished difference Result 3621 states and 10478 transitions. [2021-04-15 02:39:49,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 02:39:49,805 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:39:49,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:39:49,809 INFO L225 Difference]: With dead ends: 3621 [2021-04-15 02:39:49,809 INFO L226 Difference]: Without dead ends: 3606 [2021-04-15 02:39:49,810 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1660.7ms TimeCoverageRelationStatistics Valid=363, Invalid=2717, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 02:39:49,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2021-04-15 02:39:49,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 3017. [2021-04-15 02:39:49,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9608753315649867) internal successors, (8930), 3016 states have internal predecessors, (8930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:49,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8930 transitions. [2021-04-15 02:39:49,846 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8930 transitions. Word has length 22 [2021-04-15 02:39:49,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:39:49,846 INFO L480 AbstractCegarLoop]: Abstraction has 3017 states and 8930 transitions. [2021-04-15 02:39:49,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:49,846 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8930 transitions. [2021-04-15 02:39:49,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:39:49,849 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:39:49,849 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:39:50,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61367,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:39:50,050 INFO L428 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:39:50,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:39:50,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1949611081, now seen corresponding path program 455 times [2021-04-15 02:39:50,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:39:50,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359678322] [2021-04-15 02:39:50,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:39:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:39:50,315 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:39:50,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359678322] [2021-04-15 02:39:50,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34535878] [2021-04-15 02:39:50,315 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:39:50,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:39:50,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:39:50,335 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:39:50,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:39:51,194 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:39:51,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:39:51,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:39:52,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:39:52,460 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:39:52,460 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:39:52,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:39:53,378 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:39:53,415 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:39:53,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:39:53,416 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:39:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:39:53,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:39:53,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 02:39:53,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877771616] [2021-04-15 02:39:53,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 02:39:53,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:39:53,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 02:39:53,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:39:53,474 INFO L87 Difference]: Start difference. First operand 3017 states and 8930 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:56,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:39:56,044 INFO L93 Difference]: Finished difference Result 3506 states and 10182 transitions. [2021-04-15 02:39:56,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:39:56,046 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:39:56,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:39:56,050 INFO L225 Difference]: With dead ends: 3506 [2021-04-15 02:39:56,050 INFO L226 Difference]: Without dead ends: 3496 [2021-04-15 02:39:56,051 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 2337.3ms TimeCoverageRelationStatistics Valid=340, Invalid=2522, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 02:39:56,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2021-04-15 02:39:56,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 3017. [2021-04-15 02:39:56,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9608753315649867) internal successors, (8930), 3016 states have internal predecessors, (8930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:56,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8930 transitions. [2021-04-15 02:39:56,087 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8930 transitions. Word has length 22 [2021-04-15 02:39:56,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:39:56,087 INFO L480 AbstractCegarLoop]: Abstraction has 3017 states and 8930 transitions. [2021-04-15 02:39:56,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:56,087 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8930 transitions. [2021-04-15 02:39:56,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:39:56,090 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:39:56,090 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:39:56,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62567,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:39:56,290 INFO L428 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:39:56,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:39:56,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1255070853, now seen corresponding path program 456 times [2021-04-15 02:39:56,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:39:56,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96553082] [2021-04-15 02:39:56,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:39:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:39:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:39:56,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96553082] [2021-04-15 02:39:56,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241856276] [2021-04-15 02:39:56,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:39:56,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:39:56,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:39:56,606 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:39:56,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:39:57,507 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:39:57,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:39:57,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:40:00,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:40:00,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:40:00,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:40:00,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:40:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:00,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:00,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:40:00,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742311868] [2021-04-15 02:40:00,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:40:00,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:00,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:40:00,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:40:00,391 INFO L87 Difference]: Start difference. First operand 3017 states and 8930 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:01,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:01,827 INFO L93 Difference]: Finished difference Result 3058 states and 8994 transitions. [2021-04-15 02:40:01,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:40:01,828 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:40:01,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:01,831 INFO L225 Difference]: With dead ends: 3058 [2021-04-15 02:40:01,832 INFO L226 Difference]: Without dead ends: 3036 [2021-04-15 02:40:01,832 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1092.3ms TimeCoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 02:40:01,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2021-04-15 02:40:01,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 3017. [2021-04-15 02:40:01,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9602122015915118) internal successors, (8928), 3016 states have internal predecessors, (8928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:01,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8928 transitions. [2021-04-15 02:40:01,863 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8928 transitions. Word has length 22 [2021-04-15 02:40:01,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:01,863 INFO L480 AbstractCegarLoop]: Abstraction has 3017 states and 8928 transitions. [2021-04-15 02:40:01,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:01,863 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8928 transitions. [2021-04-15 02:40:01,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:40:01,865 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:01,865 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:40:02,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63181 [2021-04-15 02:40:02,066 INFO L428 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:02,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:02,066 INFO L82 PathProgramCache]: Analyzing trace with hash 634823837, now seen corresponding path program 457 times [2021-04-15 02:40:02,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:02,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630759185] [2021-04-15 02:40:02,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:40:02,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630759185] [2021-04-15 02:40:02,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760495739] [2021-04-15 02:40:02,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:02,408 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:40:02,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:03,339 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:40:03,340 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:40:03,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:40:04,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:40:04,648 WARN L205 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:40:04,649 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:40:04,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:40:05,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:40:05,409 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:40:05,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:40:05,411 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:40:05,499 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:05,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:05,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:40:05,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921405964] [2021-04-15 02:40:05,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:40:05,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:05,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:40:05,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:40:05,500 INFO L87 Difference]: Start difference. First operand 3017 states and 8928 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:08,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:08,802 INFO L93 Difference]: Finished difference Result 4229 states and 12230 transitions. [2021-04-15 02:40:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 02:40:08,803 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:40:08,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:08,808 INFO L225 Difference]: With dead ends: 4229 [2021-04-15 02:40:08,808 INFO L226 Difference]: Without dead ends: 4200 [2021-04-15 02:40:08,808 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 2909.3ms TimeCoverageRelationStatistics Valid=501, Invalid=4055, Unknown=0, NotChecked=0, Total=4556 [2021-04-15 02:40:08,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4200 states. [2021-04-15 02:40:08,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4200 to 3101. [2021-04-15 02:40:08,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 3100 states have (on average 2.963225806451613) internal successors, (9186), 3100 states have internal predecessors, (9186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:08,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 9186 transitions. [2021-04-15 02:40:08,845 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 9186 transitions. Word has length 22 [2021-04-15 02:40:08,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:08,845 INFO L480 AbstractCegarLoop]: Abstraction has 3101 states and 9186 transitions. [2021-04-15 02:40:08,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:08,845 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 9186 transitions. [2021-04-15 02:40:08,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:40:08,847 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:08,847 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:40:09,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63966 [2021-04-15 02:40:09,048 INFO L428 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:09,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:09,048 INFO L82 PathProgramCache]: Analyzing trace with hash 191924697, now seen corresponding path program 458 times [2021-04-15 02:40:09,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:09,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54010564] [2021-04-15 02:40:09,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:09,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:09,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54010564] [2021-04-15 02:40:09,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594496614] [2021-04-15 02:40:09,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:09,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:40:09,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:09,377 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:40:09,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:10,279 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:40:10,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:40:10,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:40:10,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:40:11,449 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:40:11,449 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:40:11,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:40:14,556 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:40:14,592 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:40:14,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:40:14,593 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:40:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:14,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:14,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 02:40:14,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414028493] [2021-04-15 02:40:14,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 02:40:14,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:14,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 02:40:14,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:40:14,656 INFO L87 Difference]: Start difference. First operand 3101 states and 9186 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:17,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:17,418 INFO L93 Difference]: Finished difference Result 4434 states and 12923 transitions. [2021-04-15 02:40:17,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 02:40:17,419 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:40:17,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:17,424 INFO L225 Difference]: With dead ends: 4434 [2021-04-15 02:40:17,424 INFO L226 Difference]: Without dead ends: 4399 [2021-04-15 02:40:17,425 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2346.7ms TimeCoverageRelationStatistics Valid=450, Invalid=3456, Unknown=0, NotChecked=0, Total=3906 [2021-04-15 02:40:17,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4399 states. [2021-04-15 02:40:17,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4399 to 2998. [2021-04-15 02:40:17,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2997 states have (on average 2.960960960960961) internal successors, (8874), 2997 states have internal predecessors, (8874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:17,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 8874 transitions. [2021-04-15 02:40:17,461 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 8874 transitions. Word has length 22 [2021-04-15 02:40:17,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:17,462 INFO L480 AbstractCegarLoop]: Abstraction has 2998 states and 8874 transitions. [2021-04-15 02:40:17,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:17,462 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 8874 transitions. [2021-04-15 02:40:17,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:40:17,464 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:17,464 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:40:17,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 463 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64382 [2021-04-15 02:40:17,669 INFO L428 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:17,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:17,669 INFO L82 PathProgramCache]: Analyzing trace with hash -653046755, now seen corresponding path program 459 times [2021-04-15 02:40:17,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:17,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562495995] [2021-04-15 02:40:17,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:17,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562495995] [2021-04-15 02:40:17,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016630902] [2021-04-15 02:40:17,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:17,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:40:17,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:17,901 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:40:17,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:18,577 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:40:18,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:40:18,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:40:19,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:40:19,801 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:40:19,802 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:40:19,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:40:20,661 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:40:20,683 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:40:20,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:40:20,684 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:40:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:20,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:20,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 02:40:20,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527199019] [2021-04-15 02:40:20,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 02:40:20,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:20,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 02:40:20,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:40:20,737 INFO L87 Difference]: Start difference. First operand 2998 states and 8874 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:23,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:23,139 INFO L93 Difference]: Finished difference Result 3726 states and 10821 transitions. [2021-04-15 02:40:23,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 02:40:23,142 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:40:23,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:23,147 INFO L225 Difference]: With dead ends: 3726 [2021-04-15 02:40:23,147 INFO L226 Difference]: Without dead ends: 3716 [2021-04-15 02:40:23,147 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 2050.5ms TimeCoverageRelationStatistics Valid=355, Invalid=2725, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 02:40:23,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3716 states. [2021-04-15 02:40:23,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3716 to 3003. [2021-04-15 02:40:23,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 2.9610259826782146) internal successors, (8889), 3002 states have internal predecessors, (8889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:23,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 8889 transitions. [2021-04-15 02:40:23,192 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 8889 transitions. Word has length 22 [2021-04-15 02:40:23,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:23,192 INFO L480 AbstractCegarLoop]: Abstraction has 3003 states and 8889 transitions. [2021-04-15 02:40:23,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:23,192 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 8889 transitions. [2021-04-15 02:40:23,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:40:23,196 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:23,196 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:40:23,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65352 [2021-04-15 02:40:23,412 INFO L428 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:23,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:23,412 INFO L82 PathProgramCache]: Analyzing trace with hash -169872295, now seen corresponding path program 460 times [2021-04-15 02:40:23,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:23,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227131463] [2021-04-15 02:40:23,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:23,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227131463] [2021-04-15 02:40:23,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42595292] [2021-04-15 02:40:23,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:23,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:40:23,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:23,607 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:40:23,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:24,362 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:40:24,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:40:24,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:40:25,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:40:25,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:40:25,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:40:25,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:40:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:25,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:25,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-04-15 02:40:25,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692122072] [2021-04-15 02:40:25,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:40:25,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:25,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:40:25,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:40:25,569 INFO L87 Difference]: Start difference. First operand 3003 states and 8889 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:27,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:27,207 INFO L93 Difference]: Finished difference Result 3030 states and 8931 transitions. [2021-04-15 02:40:27,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:40:27,209 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:40:27,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:27,213 INFO L225 Difference]: With dead ends: 3030 [2021-04-15 02:40:27,213 INFO L226 Difference]: Without dead ends: 3012 [2021-04-15 02:40:27,213 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 853.0ms TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:40:27,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2021-04-15 02:40:27,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 3003. [2021-04-15 02:40:27,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 2.960359760159893) internal successors, (8887), 3002 states have internal predecessors, (8887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:27,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 8887 transitions. [2021-04-15 02:40:27,247 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 8887 transitions. Word has length 22 [2021-04-15 02:40:27,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:27,247 INFO L480 AbstractCegarLoop]: Abstraction has 3003 states and 8887 transitions. [2021-04-15 02:40:27,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:27,248 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 8887 transitions. [2021-04-15 02:40:27,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:40:27,251 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:27,251 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:40:27,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65858 [2021-04-15 02:40:27,451 INFO L428 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:27,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:27,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1882629879, now seen corresponding path program 461 times [2021-04-15 02:40:27,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:27,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954456232] [2021-04-15 02:40:27,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:27,790 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:27,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954456232] [2021-04-15 02:40:27,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588550928] [2021-04-15 02:40:27,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:27,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:40:27,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:27,810 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:40:27,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:29,009 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:40:29,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:40:29,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:40:29,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:40:30,338 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:40:30,339 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:40:30,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:40:31,008 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:40:31,053 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:40:31,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:40:31,055 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:40:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:31,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:31,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 02:40:31,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346933088] [2021-04-15 02:40:31,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 02:40:31,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:31,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 02:40:31,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:40:31,117 INFO L87 Difference]: Start difference. First operand 3003 states and 8887 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:32,635 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-04-15 02:40:34,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:34,430 INFO L93 Difference]: Finished difference Result 3530 states and 10303 transitions. [2021-04-15 02:40:34,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 02:40:34,432 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:40:34,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:34,437 INFO L225 Difference]: With dead ends: 3530 [2021-04-15 02:40:34,437 INFO L226 Difference]: Without dead ends: 3520 [2021-04-15 02:40:34,438 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 3133.6ms TimeCoverageRelationStatistics Valid=421, Invalid=3001, Unknown=0, NotChecked=0, Total=3422 [2021-04-15 02:40:34,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3520 states. [2021-04-15 02:40:34,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3520 to 3073. [2021-04-15 02:40:34,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3073 states, 3072 states have (on average 2.9619140625) internal successors, (9099), 3072 states have internal predecessors, (9099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:34,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3073 states to 3073 states and 9099 transitions. [2021-04-15 02:40:34,493 INFO L78 Accepts]: Start accepts. Automaton has 3073 states and 9099 transitions. Word has length 22 [2021-04-15 02:40:34,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:34,493 INFO L480 AbstractCegarLoop]: Abstraction has 3073 states and 9099 transitions. [2021-04-15 02:40:34,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:34,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3073 states and 9099 transitions. [2021-04-15 02:40:34,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:40:34,496 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:34,496 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:40:34,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66160 [2021-04-15 02:40:34,705 INFO L428 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:34,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:34,706 INFO L82 PathProgramCache]: Analyzing trace with hash 834965435, now seen corresponding path program 462 times [2021-04-15 02:40:34,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:34,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34795565] [2021-04-15 02:40:34,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:34,871 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:34,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34795565] [2021-04-15 02:40:34,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569974609] [2021-04-15 02:40:34,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:34,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:40:34,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:34,892 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:40:34,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:35,874 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:40:35,874 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:40:35,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:40:36,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:40:36,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:40:36,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:40:36,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:40:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:36,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:36,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-04-15 02:40:36,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588316291] [2021-04-15 02:40:36,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:40:36,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:36,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:40:36,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:40:36,811 INFO L87 Difference]: Start difference. First operand 3073 states and 9099 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:38,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:38,294 INFO L93 Difference]: Finished difference Result 3616 states and 10700 transitions. [2021-04-15 02:40:38,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:40:38,295 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:40:38,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:38,299 INFO L225 Difference]: With dead ends: 3616 [2021-04-15 02:40:38,299 INFO L226 Difference]: Without dead ends: 3600 [2021-04-15 02:40:38,299 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 859.8ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:40:38,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states. [2021-04-15 02:40:38,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 3562. [2021-04-15 02:40:38,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3562 states, 3561 states have (on average 2.974726200505476) internal successors, (10593), 3561 states have internal predecessors, (10593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:38,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3562 states to 3562 states and 10593 transitions. [2021-04-15 02:40:38,355 INFO L78 Accepts]: Start accepts. Automaton has 3562 states and 10593 transitions. Word has length 22 [2021-04-15 02:40:38,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:38,355 INFO L480 AbstractCegarLoop]: Abstraction has 3562 states and 10593 transitions. [2021-04-15 02:40:38,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:38,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3562 states and 10593 transitions. [2021-04-15 02:40:38,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:40:38,358 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:38,358 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:40:38,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66591,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:38,558 INFO L428 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:38,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:38,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1693839965, now seen corresponding path program 463 times [2021-04-15 02:40:38,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:38,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921964016] [2021-04-15 02:40:38,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:38,720 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:38,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921964016] [2021-04-15 02:40:38,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435805228] [2021-04-15 02:40:38,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:38,739 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:40:38,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:39,354 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:40:39,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:40:39,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:40:39,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:40:40,231 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:40:40,232 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:40:40,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:40:40,976 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:40:41,001 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:40:41,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:40:41,002 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:40:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:41,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:41,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-04-15 02:40:41,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92165911] [2021-04-15 02:40:41,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:40:41,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:41,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:40:41,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:40:41,071 INFO L87 Difference]: Start difference. First operand 3562 states and 10593 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:44,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:44,591 INFO L93 Difference]: Finished difference Result 3947 states and 11563 transitions. [2021-04-15 02:40:44,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-04-15 02:40:44,592 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:40:44,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:44,597 INFO L225 Difference]: With dead ends: 3947 [2021-04-15 02:40:44,597 INFO L226 Difference]: Without dead ends: 3909 [2021-04-15 02:40:44,598 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 2179.8ms TimeCoverageRelationStatistics Valid=383, Invalid=3777, Unknown=0, NotChecked=0, Total=4160 [2021-04-15 02:40:44,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3909 states. [2021-04-15 02:40:44,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3909 to 3568. [2021-04-15 02:40:44,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3568 states, 3567 states have (on average 2.976170451359686) internal successors, (10616), 3567 states have internal predecessors, (10616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:44,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3568 states to 3568 states and 10616 transitions. [2021-04-15 02:40:44,636 INFO L78 Accepts]: Start accepts. Automaton has 3568 states and 10616 transitions. Word has length 22 [2021-04-15 02:40:44,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:44,636 INFO L480 AbstractCegarLoop]: Abstraction has 3568 states and 10616 transitions. [2021-04-15 02:40:44,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:44,636 INFO L276 IsEmpty]: Start isEmpty. Operand 3568 states and 10616 transitions. [2021-04-15 02:40:44,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:40:44,639 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:44,639 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:40:44,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66828 [2021-04-15 02:40:44,841 INFO L428 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:44,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:44,841 INFO L82 PathProgramCache]: Analyzing trace with hash -890514023, now seen corresponding path program 464 times [2021-04-15 02:40:44,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:44,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471995087] [2021-04-15 02:40:44,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:44,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:45,137 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:40:45,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471995087] [2021-04-15 02:40:45,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290056838] [2021-04-15 02:40:45,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:45,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:40:45,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:45,157 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:40:45,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:46,342 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:40:46,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:40:46,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:40:47,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:40:48,185 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:40:48,185 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:40:48,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:40:49,406 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:40:49,448 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:40:49,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:40:49,450 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:40:49,567 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:49,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:49,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-04-15 02:40:49,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723358338] [2021-04-15 02:40:49,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:40:49,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:49,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:40:49,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:40:49,568 INFO L87 Difference]: Start difference. First operand 3568 states and 10616 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:52,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:52,859 INFO L93 Difference]: Finished difference Result 4191 states and 12335 transitions. [2021-04-15 02:40:52,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 02:40:52,861 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:40:52,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:52,866 INFO L225 Difference]: With dead ends: 4191 [2021-04-15 02:40:52,867 INFO L226 Difference]: Without dead ends: 4181 [2021-04-15 02:40:52,867 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 2167.1ms TimeCoverageRelationStatistics Valid=262, Invalid=2708, Unknown=0, NotChecked=0, Total=2970 [2021-04-15 02:40:52,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2021-04-15 02:40:52,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 3738. [2021-04-15 02:40:52,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3738 states, 3737 states have (on average 2.98019801980198) internal successors, (11137), 3737 states have internal predecessors, (11137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:52,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 11137 transitions. [2021-04-15 02:40:52,916 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 11137 transitions. Word has length 22 [2021-04-15 02:40:52,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:52,916 INFO L480 AbstractCegarLoop]: Abstraction has 3738 states and 11137 transitions. [2021-04-15 02:40:52,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:52,916 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 11137 transitions. [2021-04-15 02:40:52,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:40:52,920 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:52,920 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:40:53,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67185,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:53,120 INFO L428 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:53,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:53,121 INFO L82 PathProgramCache]: Analyzing trace with hash 598890973, now seen corresponding path program 465 times [2021-04-15 02:40:53,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:53,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48962055] [2021-04-15 02:40:53,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:53,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48962055] [2021-04-15 02:40:53,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139522671] [2021-04-15 02:40:53,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:53,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:40:53,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:53,443 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:40:53,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:54,461 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:40:54,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:40:54,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:40:55,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:40:55,749 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:40:55,750 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:40:55,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:40:56,612 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:40:56,655 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:40:56,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:40:56,657 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:40:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:56,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:56,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:40:56,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148995849] [2021-04-15 02:40:56,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:40:56,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:56,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:40:56,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:40:56,751 INFO L87 Difference]: Start difference. First operand 3738 states and 11137 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:00,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:41:00,434 INFO L93 Difference]: Finished difference Result 4542 states and 13216 transitions. [2021-04-15 02:41:00,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-04-15 02:41:00,436 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:41:00,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:41:00,441 INFO L225 Difference]: With dead ends: 4542 [2021-04-15 02:41:00,441 INFO L226 Difference]: Without dead ends: 4508 [2021-04-15 02:41:00,442 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 2626.2ms TimeCoverageRelationStatistics Valid=405, Invalid=3885, Unknown=0, NotChecked=0, Total=4290 [2021-04-15 02:41:00,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4508 states. [2021-04-15 02:41:00,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4508 to 3743. [2021-04-15 02:41:00,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3743 states, 3742 states have (on average 2.980224478888295) internal successors, (11152), 3742 states have internal predecessors, (11152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:00,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3743 states to 3743 states and 11152 transitions. [2021-04-15 02:41:00,482 INFO L78 Accepts]: Start accepts. Automaton has 3743 states and 11152 transitions. Word has length 22 [2021-04-15 02:41:00,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:41:00,482 INFO L480 AbstractCegarLoop]: Abstraction has 3743 states and 11152 transitions. [2021-04-15 02:41:00,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:00,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3743 states and 11152 transitions. [2021-04-15 02:41:00,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:41:00,486 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:41:00,486 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:41:00,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67834,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:00,686 INFO L428 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:41:00,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:41:00,687 INFO L82 PathProgramCache]: Analyzing trace with hash -474194407, now seen corresponding path program 466 times [2021-04-15 02:41:00,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:41:00,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928402603] [2021-04-15 02:41:00,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:41:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:41:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:41:00,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928402603] [2021-04-15 02:41:00,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294307637] [2021-04-15 02:41:00,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:01,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:41:01,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:41:01,017 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:41:01,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:41:02,014 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:41:02,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:41:02,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:41:02,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:41:02,929 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:41:02,930 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:41:02,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:41:04,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:41:04,097 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:41:04,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:41:04,098 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:41:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:04,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:41:04,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:41:04,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394648324] [2021-04-15 02:41:04,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:41:04,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:41:04,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:41:04,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:41:04,150 INFO L87 Difference]: Start difference. First operand 3743 states and 11152 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:06,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:41:06,672 INFO L93 Difference]: Finished difference Result 4115 states and 12062 transitions. [2021-04-15 02:41:06,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 02:41:06,673 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:41:06,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:41:06,678 INFO L225 Difference]: With dead ends: 4115 [2021-04-15 02:41:06,678 INFO L226 Difference]: Without dead ends: 4100 [2021-04-15 02:41:06,679 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 2286.7ms TimeCoverageRelationStatistics Valid=386, Invalid=3154, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 02:41:06,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4100 states. [2021-04-15 02:41:06,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4100 to 3823. [2021-04-15 02:41:06,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3823 states, 3822 states have (on average 2.980638409209838) internal successors, (11392), 3822 states have internal predecessors, (11392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:06,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3823 states to 3823 states and 11392 transitions. [2021-04-15 02:41:06,726 INFO L78 Accepts]: Start accepts. Automaton has 3823 states and 11392 transitions. Word has length 22 [2021-04-15 02:41:06,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:41:06,726 INFO L480 AbstractCegarLoop]: Abstraction has 3823 states and 11392 transitions. [2021-04-15 02:41:06,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:06,726 INFO L276 IsEmpty]: Start isEmpty. Operand 3823 states and 11392 transitions. [2021-04-15 02:41:06,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:41:06,730 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:41:06,730 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:41:06,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68209 [2021-04-15 02:41:06,931 INFO L428 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:41:06,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:41:06,931 INFO L82 PathProgramCache]: Analyzing trace with hash 619897181, now seen corresponding path program 467 times [2021-04-15 02:41:06,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:41:06,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782695183] [2021-04-15 02:41:06,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:41:06,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:41:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:07,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782695183] [2021-04-15 02:41:07,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460813817] [2021-04-15 02:41:07,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:07,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:41:07,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:41:07,277 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:41:07,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:41:08,281 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:41:08,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:41:08,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:41:10,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:41:11,136 WARN L205 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:41:11,137 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:41:11,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:41:13,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:41:13,994 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:41:13,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:41:13,996 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:41:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:14,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:41:14,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:41:14,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966926766] [2021-04-15 02:41:14,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:41:14,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:41:14,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:41:14,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:41:14,089 INFO L87 Difference]: Start difference. First operand 3823 states and 11392 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:17,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:41:17,836 INFO L93 Difference]: Finished difference Result 4266 states and 12418 transitions. [2021-04-15 02:41:17,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 02:41:17,838 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:41:17,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:41:17,843 INFO L225 Difference]: With dead ends: 4266 [2021-04-15 02:41:17,843 INFO L226 Difference]: Without dead ends: 4241 [2021-04-15 02:41:17,844 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1360 ImplicationChecksByTransitivity, 3116.4ms TimeCoverageRelationStatistics Valid=550, Invalid=4280, Unknown=0, NotChecked=0, Total=4830 [2021-04-15 02:41:17,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2021-04-15 02:41:17,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 3827. [2021-04-15 02:41:17,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3827 states, 3826 states have (on average 2.979874542603241) internal successors, (11401), 3826 states have internal predecessors, (11401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:17,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 11401 transitions. [2021-04-15 02:41:17,893 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 11401 transitions. Word has length 22 [2021-04-15 02:41:17,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:41:17,893 INFO L480 AbstractCegarLoop]: Abstraction has 3827 states and 11401 transitions. [2021-04-15 02:41:17,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:17,894 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 11401 transitions. [2021-04-15 02:41:17,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:41:17,897 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:41:17,897 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:41:18,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68703,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:18,098 INFO L428 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:41:18,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:41:18,098 INFO L82 PathProgramCache]: Analyzing trace with hash 176998041, now seen corresponding path program 468 times [2021-04-15 02:41:18,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:41:18,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018844862] [2021-04-15 02:41:18,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:41:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:41:18,313 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:41:18,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018844862] [2021-04-15 02:41:18,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714500355] [2021-04-15 02:41:18,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:18,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:41:18,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:41:18,335 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:41:18,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:41:19,312 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:41:19,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:41:19,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:41:21,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:41:22,130 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:41:22,131 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:41:22,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:41:23,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:41:23,518 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:41:23,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:41:23,519 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:41:23,570 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:23,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:41:23,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:41:23,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576193479] [2021-04-15 02:41:23,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:41:23,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:41:23,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:41:23,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:41:23,571 INFO L87 Difference]: Start difference. First operand 3827 states and 11401 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:25,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:41:25,339 INFO L93 Difference]: Finished difference Result 4070 states and 11961 transitions. [2021-04-15 02:41:25,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 02:41:25,340 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:41:25,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:41:25,345 INFO L225 Difference]: With dead ends: 4070 [2021-04-15 02:41:25,345 INFO L226 Difference]: Without dead ends: 4055 [2021-04-15 02:41:25,346 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1929.7ms TimeCoverageRelationStatistics Valid=406, Invalid=2786, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 02:41:25,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4055 states. [2021-04-15 02:41:25,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4055 to 3835. [2021-04-15 02:41:25,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 2.979134063641106) internal successors, (11422), 3834 states have internal predecessors, (11422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:25,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 11422 transitions. [2021-04-15 02:41:25,383 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 11422 transitions. Word has length 22 [2021-04-15 02:41:25,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:41:25,383 INFO L480 AbstractCegarLoop]: Abstraction has 3835 states and 11422 transitions. [2021-04-15 02:41:25,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:25,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 11422 transitions. [2021-04-15 02:41:25,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:41:25,386 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:41:25,386 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:41:25,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69843,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:25,587 INFO L428 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:41:25,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:41:25,587 INFO L82 PathProgramCache]: Analyzing trace with hash -667973411, now seen corresponding path program 469 times [2021-04-15 02:41:25,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:41:25,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702838974] [2021-04-15 02:41:25,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:41:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:41:25,919 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:25,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702838974] [2021-04-15 02:41:25,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720893724] [2021-04-15 02:41:25,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:41:25,939 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:41:25,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:41:26,760 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:41:26,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:41:26,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:41:27,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:41:28,102 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:41:28,103 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:41:28,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:41:29,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:41:29,105 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:41:29,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:41:29,107 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:41:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:29,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:41:29,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 02:41:29,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574661944] [2021-04-15 02:41:29,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 02:41:29,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:41:29,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 02:41:29,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:41:29,209 INFO L87 Difference]: Start difference. First operand 3835 states and 11422 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:32,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:41:32,533 INFO L93 Difference]: Finished difference Result 4162 states and 12188 transitions. [2021-04-15 02:41:32,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 02:41:32,535 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:41:32,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:41:32,541 INFO L225 Difference]: With dead ends: 4162 [2021-04-15 02:41:32,541 INFO L226 Difference]: Without dead ends: 4147 [2021-04-15 02:41:32,542 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 2817.4ms TimeCoverageRelationStatistics Valid=388, Invalid=2692, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 02:41:32,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4147 states. [2021-04-15 02:41:32,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4147 to 3837. [2021-04-15 02:41:32,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3837 states, 3836 states have (on average 2.980187695516163) internal successors, (11432), 3836 states have internal predecessors, (11432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:32,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3837 states to 3837 states and 11432 transitions. [2021-04-15 02:41:32,588 INFO L78 Accepts]: Start accepts. Automaton has 3837 states and 11432 transitions. Word has length 22 [2021-04-15 02:41:32,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:41:32,588 INFO L480 AbstractCegarLoop]: Abstraction has 3837 states and 11432 transitions. [2021-04-15 02:41:32,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:32,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3837 states and 11432 transitions. [2021-04-15 02:41:32,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:41:32,591 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:41:32,591 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:41:32,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70781,474 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:32,792 INFO L428 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:41:32,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:41:32,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1092284647, now seen corresponding path program 470 times [2021-04-15 02:41:32,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:41:32,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320509507] [2021-04-15 02:41:32,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:41:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:41:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:33,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320509507] [2021-04-15 02:41:33,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940682645] [2021-04-15 02:41:33,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:33,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:41:33,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:41:33,082 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:41:33,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:41:34,168 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:41:34,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:41:34,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:41:35,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:41:35,496 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:41:35,496 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:41:35,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:41:36,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:41:36,043 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:41:36,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:41:36,045 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:41:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:36,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:41:36,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 02:41:36,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699145137] [2021-04-15 02:41:36,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 02:41:36,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:41:36,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 02:41:36,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:41:36,124 INFO L87 Difference]: Start difference. First operand 3837 states and 11432 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:38,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:41:38,425 INFO L93 Difference]: Finished difference Result 4061 states and 11974 transitions. [2021-04-15 02:41:38,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:41:38,427 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:41:38,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:41:38,432 INFO L225 Difference]: With dead ends: 4061 [2021-04-15 02:41:38,433 INFO L226 Difference]: Without dead ends: 4056 [2021-04-15 02:41:38,433 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 2368.0ms TimeCoverageRelationStatistics Valid=308, Invalid=2242, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 02:41:38,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4056 states. [2021-04-15 02:41:38,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4056 to 3837. [2021-04-15 02:41:38,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3837 states, 3836 states have (on average 2.980187695516163) internal successors, (11432), 3836 states have internal predecessors, (11432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:38,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3837 states to 3837 states and 11432 transitions. [2021-04-15 02:41:38,473 INFO L78 Accepts]: Start accepts. Automaton has 3837 states and 11432 transitions. Word has length 22 [2021-04-15 02:41:38,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:41:38,473 INFO L480 AbstractCegarLoop]: Abstraction has 3837 states and 11432 transitions. [2021-04-15 02:41:38,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:38,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3837 states and 11432 transitions. [2021-04-15 02:41:38,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:41:38,477 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:41:38,477 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:41:38,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71248,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:38,677 INFO L428 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:41:38,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:41:38,677 INFO L82 PathProgramCache]: Analyzing trace with hash -888472465, now seen corresponding path program 471 times [2021-04-15 02:41:38,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:41:38,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340055235] [2021-04-15 02:41:38,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:41:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:41:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:38,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340055235] [2021-04-15 02:41:38,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962893402] [2021-04-15 02:41:38,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:38,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:41:38,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:41:38,940 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:41:38,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:41:39,816 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:41:39,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:41:39,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:41:40,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:41:40,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:41:40,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:41:40,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:41:40,452 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:40,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:41:40,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 02:41:40,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815233331] [2021-04-15 02:41:40,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 02:41:40,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:41:40,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 02:41:40,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:41:40,453 INFO L87 Difference]: Start difference. First operand 3837 states and 11432 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:41,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:41:41,822 INFO L93 Difference]: Finished difference Result 3926 states and 11589 transitions. [2021-04-15 02:41:41,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:41:41,823 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:41:41,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:41:41,828 INFO L225 Difference]: With dead ends: 3926 [2021-04-15 02:41:41,828 INFO L226 Difference]: Without dead ends: 3892 [2021-04-15 02:41:41,828 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1033.8ms TimeCoverageRelationStatistics Valid=129, Invalid=1431, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 02:41:41,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3892 states. [2021-04-15 02:41:41,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3892 to 3837. [2021-04-15 02:41:41,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3837 states, 3836 states have (on average 2.9770594369134513) internal successors, (11420), 3836 states have internal predecessors, (11420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:41,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3837 states to 3837 states and 11420 transitions. [2021-04-15 02:41:41,868 INFO L78 Accepts]: Start accepts. Automaton has 3837 states and 11420 transitions. Word has length 22 [2021-04-15 02:41:41,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:41:41,868 INFO L480 AbstractCegarLoop]: Abstraction has 3837 states and 11420 transitions. [2021-04-15 02:41:41,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:41,869 INFO L276 IsEmpty]: Start isEmpty. Operand 3837 states and 11420 transitions. [2021-04-15 02:41:41,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:41:41,872 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:41:41,872 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:41:42,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71642 [2021-04-15 02:41:42,072 INFO L428 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:41:42,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:41:42,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1530645197, now seen corresponding path program 472 times [2021-04-15 02:41:42,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:41:42,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416011450] [2021-04-15 02:41:42,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:41:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:41:42,290 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:42,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416011450] [2021-04-15 02:41:42,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817507123] [2021-04-15 02:41:42,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:42,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:41:42,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:41:42,309 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:41:42,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:41:43,034 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:41:43,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:41:43,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:41:44,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:41:45,396 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:41:45,396 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:41:45,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:41:47,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:41:47,710 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:41:47,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:41:47,712 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:41:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:47,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:41:47,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 02:41:47,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314535685] [2021-04-15 02:41:47,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 02:41:47,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:41:47,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 02:41:47,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:41:47,774 INFO L87 Difference]: Start difference. First operand 3837 states and 11420 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:50,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:41:50,708 INFO L93 Difference]: Finished difference Result 5195 states and 15297 transitions. [2021-04-15 02:41:50,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 02:41:50,709 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:41:50,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:41:50,714 INFO L225 Difference]: With dead ends: 5195 [2021-04-15 02:41:50,715 INFO L226 Difference]: Without dead ends: 5185 [2021-04-15 02:41:50,715 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 2592.2ms TimeCoverageRelationStatistics Valid=452, Invalid=3454, Unknown=0, NotChecked=0, Total=3906 [2021-04-15 02:41:50,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5185 states. [2021-04-15 02:41:50,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5185 to 3835. [2021-04-15 02:41:50,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 2.9770474700052163) internal successors, (11414), 3834 states have internal predecessors, (11414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:50,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 11414 transitions. [2021-04-15 02:41:50,758 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 11414 transitions. Word has length 22 [2021-04-15 02:41:50,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:41:50,758 INFO L480 AbstractCegarLoop]: Abstraction has 3835 states and 11414 transitions. [2021-04-15 02:41:50,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:50,758 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 11414 transitions. [2021-04-15 02:41:50,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:41:50,761 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:41:50,761 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:41:50,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71817,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:50,961 INFO L428 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:41:50,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:41:50,962 INFO L82 PathProgramCache]: Analyzing trace with hash -826179089, now seen corresponding path program 473 times [2021-04-15 02:41:50,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:41:50,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737461550] [2021-04-15 02:41:50,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:41:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:41:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:41:51,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737461550] [2021-04-15 02:41:51,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989987039] [2021-04-15 02:41:51,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:51,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:41:51,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:41:51,161 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:41:51,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:41:51,824 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:41:51,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:41:51,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:41:52,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:41:53,270 WARN L205 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:41:53,271 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:41:53,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:41:55,762 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:41:55,810 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:41:55,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:41:55,812 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:41:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:55,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:41:55,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:41:55,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056912058] [2021-04-15 02:41:55,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:41:55,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:41:55,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:41:55,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:41:55,916 INFO L87 Difference]: Start difference. First operand 3835 states and 11414 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:59,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:41:59,980 INFO L93 Difference]: Finished difference Result 4678 states and 13584 transitions. [2021-04-15 02:41:59,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-04-15 02:41:59,982 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:41:59,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:41:59,987 INFO L225 Difference]: With dead ends: 4678 [2021-04-15 02:41:59,987 INFO L226 Difference]: Without dead ends: 4651 [2021-04-15 02:41:59,987 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 2937.9ms TimeCoverageRelationStatistics Valid=505, Invalid=4465, Unknown=0, NotChecked=0, Total=4970 [2021-04-15 02:41:59,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4651 states. [2021-04-15 02:42:00,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 3854. [2021-04-15 02:42:00,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3854 states, 3853 states have (on average 2.9774201920581365) internal successors, (11472), 3853 states have internal predecessors, (11472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:00,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3854 states to 3854 states and 11472 transitions. [2021-04-15 02:42:00,027 INFO L78 Accepts]: Start accepts. Automaton has 3854 states and 11472 transitions. Word has length 22 [2021-04-15 02:42:00,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:42:00,027 INFO L480 AbstractCegarLoop]: Abstraction has 3854 states and 11472 transitions. [2021-04-15 02:42:00,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:00,027 INFO L276 IsEmpty]: Start isEmpty. Operand 3854 states and 11472 transitions. [2021-04-15 02:42:00,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:42:00,030 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:42:00,030 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:42:00,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72823 [2021-04-15 02:42:00,231 INFO L428 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:42:00,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:42:00,231 INFO L82 PathProgramCache]: Analyzing trace with hash 267912499, now seen corresponding path program 474 times [2021-04-15 02:42:00,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:42:00,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155572236] [2021-04-15 02:42:00,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:42:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:42:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:42:00,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155572236] [2021-04-15 02:42:00,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329732065] [2021-04-15 02:42:00,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:42:00,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:42:00,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:42:00,457 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:42:00,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:42:01,258 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:42:01,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:42:01,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:42:02,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:42:02,981 WARN L205 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:42:02,982 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:42:02,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:42:04,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:42:04,472 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:42:04,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:42:04,473 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:42:04,577 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:42:04,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:42:04,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:42:04,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593672204] [2021-04-15 02:42:04,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:42:04,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:42:04,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:42:04,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:42:04,578 INFO L87 Difference]: Start difference. First operand 3854 states and 11472 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:09,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:42:09,534 INFO L93 Difference]: Finished difference Result 4897 states and 14197 transitions. [2021-04-15 02:42:09,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-04-15 02:42:09,535 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:42:09,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:42:09,540 INFO L225 Difference]: With dead ends: 4897 [2021-04-15 02:42:09,540 INFO L226 Difference]: Without dead ends: 4858 [2021-04-15 02:42:09,541 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1883 ImplicationChecksByTransitivity, 3721.9ms TimeCoverageRelationStatistics Valid=656, Invalid=5506, Unknown=0, NotChecked=0, Total=6162 [2021-04-15 02:42:09,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4858 states. [2021-04-15 02:42:09,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4858 to 3873. [2021-04-15 02:42:09,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3873 states, 3872 states have (on average 2.977789256198347) internal successors, (11530), 3872 states have internal predecessors, (11530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:09,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3873 states to 3873 states and 11530 transitions. [2021-04-15 02:42:09,582 INFO L78 Accepts]: Start accepts. Automaton has 3873 states and 11530 transitions. Word has length 22 [2021-04-15 02:42:09,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:42:09,582 INFO L480 AbstractCegarLoop]: Abstraction has 3873 states and 11530 transitions. [2021-04-15 02:42:09,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:09,582 INFO L276 IsEmpty]: Start isEmpty. Operand 3873 states and 11530 transitions. [2021-04-15 02:42:09,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:42:09,585 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:42:09,585 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:42:09,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73508,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:42:09,786 INFO L428 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:42:09,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:42:09,786 INFO L82 PathProgramCache]: Analyzing trace with hash -174986641, now seen corresponding path program 475 times [2021-04-15 02:42:09,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:42:09,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374092357] [2021-04-15 02:42:09,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:42:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:42:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:42:10,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374092357] [2021-04-15 02:42:10,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164462751] [2021-04-15 02:42:10,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:42:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:42:10,213 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:42:10,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:42:11,555 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:42:11,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:42:11,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:42:15,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:42:16,058 WARN L205 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:42:16,058 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:42:16,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:42:17,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:42:17,689 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:42:17,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:42:17,691 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:42:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:42:17,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:42:17,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:42:17,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055556820] [2021-04-15 02:42:17,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:42:17,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:42:17,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:42:17,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:42:17,741 INFO L87 Difference]: Start difference. First operand 3873 states and 11530 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:21,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:42:21,441 INFO L93 Difference]: Finished difference Result 4322 states and 12624 transitions. [2021-04-15 02:42:21,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 02:42:21,443 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:42:21,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:42:21,449 INFO L225 Difference]: With dead ends: 4322 [2021-04-15 02:42:21,449 INFO L226 Difference]: Without dead ends: 4307 [2021-04-15 02:42:21,449 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 3351.6ms TimeCoverageRelationStatistics Valid=468, Invalid=3314, Unknown=0, NotChecked=0, Total=3782 [2021-04-15 02:42:21,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4307 states. [2021-04-15 02:42:21,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4307 to 3890. [2021-04-15 02:42:21,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3890 states, 3889 states have (on average 2.977114939573155) internal successors, (11578), 3889 states have internal predecessors, (11578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:21,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3890 states to 3890 states and 11578 transitions. [2021-04-15 02:42:21,500 INFO L78 Accepts]: Start accepts. Automaton has 3890 states and 11578 transitions. Word has length 22 [2021-04-15 02:42:21,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:42:21,500 INFO L480 AbstractCegarLoop]: Abstraction has 3890 states and 11578 transitions. [2021-04-15 02:42:21,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:21,500 INFO L276 IsEmpty]: Start isEmpty. Operand 3890 states and 11578 transitions. [2021-04-15 02:42:21,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:42:21,504 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:42:21,504 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:42:21,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74106 [2021-04-15 02:42:21,705 INFO L428 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:42:21,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:42:21,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1019958093, now seen corresponding path program 476 times [2021-04-15 02:42:21,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:42:21,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148916722] [2021-04-15 02:42:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:42:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:42:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:42:22,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148916722] [2021-04-15 02:42:22,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028311261] [2021-04-15 02:42:22,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:42:22,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:42:22,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:42:22,162 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:42:22,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:42:23,424 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:42:23,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:42:23,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:42:24,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:42:24,857 WARN L205 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:42:24,858 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:42:24,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:42:26,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:42:26,353 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:42:26,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:42:26,355 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:42:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:42:26,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:42:26,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 02:42:26,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275267109] [2021-04-15 02:42:26,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 02:42:26,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:42:26,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 02:42:26,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:42:26,458 INFO L87 Difference]: Start difference. First operand 3890 states and 11578 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:29,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:42:29,594 INFO L93 Difference]: Finished difference Result 4444 states and 12980 transitions. [2021-04-15 02:42:29,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 02:42:29,596 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:42:29,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:42:29,602 INFO L225 Difference]: With dead ends: 4444 [2021-04-15 02:42:29,602 INFO L226 Difference]: Without dead ends: 4429 [2021-04-15 02:42:29,602 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 3141.1ms TimeCoverageRelationStatistics Valid=426, Invalid=3114, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 02:42:29,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4429 states. [2021-04-15 02:42:29,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4429 to 3895. [2021-04-15 02:42:29,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3895 states, 3894 states have (on average 2.978428351309707) internal successors, (11598), 3894 states have internal predecessors, (11598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:29,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3895 states to 3895 states and 11598 transitions. [2021-04-15 02:42:29,653 INFO L78 Accepts]: Start accepts. Automaton has 3895 states and 11598 transitions. Word has length 22 [2021-04-15 02:42:29,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:42:29,653 INFO L480 AbstractCegarLoop]: Abstraction has 3895 states and 11598 transitions. [2021-04-15 02:42:29,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:29,653 INFO L276 IsEmpty]: Start isEmpty. Operand 3895 states and 11598 transitions. [2021-04-15 02:42:29,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:42:29,657 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:42:29,657 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:42:29,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75284,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:42:29,858 INFO L428 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:42:29,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:42:29,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1444269329, now seen corresponding path program 477 times [2021-04-15 02:42:29,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:42:29,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134154736] [2021-04-15 02:42:29,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:42:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:42:30,169 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:42:30,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134154736] [2021-04-15 02:42:30,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102132245] [2021-04-15 02:42:30,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:42:30,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:42:30,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:42:30,191 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:42:30,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:42:31,459 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:42:31,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:42:31,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:42:33,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:42:33,899 WARN L205 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:42:33,900 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:42:33,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:42:35,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:42:35,622 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:42:35,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:42:35,624 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:42:35,743 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:42:35,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:42:35,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 02:42:35,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572859561] [2021-04-15 02:42:35,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 02:42:35,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:42:35,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 02:42:35,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:42:35,744 INFO L87 Difference]: Start difference. First operand 3895 states and 11598 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:37,636 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-04-15 02:42:39,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:42:39,391 INFO L93 Difference]: Finished difference Result 4314 states and 12654 transitions. [2021-04-15 02:42:39,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 02:42:39,392 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:42:39,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:42:39,397 INFO L225 Difference]: With dead ends: 4314 [2021-04-15 02:42:39,397 INFO L226 Difference]: Without dead ends: 4304 [2021-04-15 02:42:39,398 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 3221.5ms TimeCoverageRelationStatistics Valid=399, Invalid=2907, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 02:42:39,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4304 states. [2021-04-15 02:42:39,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4304 to 3895. [2021-04-15 02:42:39,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3895 states, 3894 states have (on average 2.978428351309707) internal successors, (11598), 3894 states have internal predecessors, (11598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:39,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3895 states to 3895 states and 11598 transitions. [2021-04-15 02:42:39,447 INFO L78 Accepts]: Start accepts. Automaton has 3895 states and 11598 transitions. Word has length 22 [2021-04-15 02:42:39,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:42:39,447 INFO L480 AbstractCegarLoop]: Abstraction has 3895 states and 11598 transitions. [2021-04-15 02:42:39,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:39,447 INFO L276 IsEmpty]: Start isEmpty. Operand 3895 states and 11598 transitions. [2021-04-15 02:42:39,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:42:39,451 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:42:39,451 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:42:39,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75800 [2021-04-15 02:42:39,652 INFO L428 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:42:39,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:42:39,652 INFO L82 PathProgramCache]: Analyzing trace with hash -68267093, now seen corresponding path program 478 times [2021-04-15 02:42:39,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:42:39,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172734274] [2021-04-15 02:42:39,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:42:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:42:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:42:39,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172734274] [2021-04-15 02:42:39,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707197290] [2021-04-15 02:42:39,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:42:39,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:42:39,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:42:39,998 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:42:39,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:42:41,366 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:42:41,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:42:41,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:42:41,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:42:41,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:42:41,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:42:41,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:42:41,970 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:42:41,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:42:41,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:42:41,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430090994] [2021-04-15 02:42:41,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:42:41,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:42:41,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:42:41,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:42:41,970 INFO L87 Difference]: Start difference. First operand 3895 states and 11598 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:43,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:42:43,636 INFO L93 Difference]: Finished difference Result 3971 states and 11733 transitions. [2021-04-15 02:42:43,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:42:43,639 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:42:43,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:42:43,644 INFO L225 Difference]: With dead ends: 3971 [2021-04-15 02:42:43,644 INFO L226 Difference]: Without dead ends: 3943 [2021-04-15 02:42:43,645 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1476.9ms TimeCoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:42:43,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3943 states. [2021-04-15 02:42:43,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3943 to 3895. [2021-04-15 02:42:43,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3895 states, 3894 states have (on average 2.9758602978941964) internal successors, (11588), 3894 states have internal predecessors, (11588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:43,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3895 states to 3895 states and 11588 transitions. [2021-04-15 02:42:43,695 INFO L78 Accepts]: Start accepts. Automaton has 3895 states and 11588 transitions. Word has length 22 [2021-04-15 02:42:43,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:42:43,695 INFO L480 AbstractCegarLoop]: Abstraction has 3895 states and 11588 transitions. [2021-04-15 02:42:43,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:43,695 INFO L276 IsEmpty]: Start isEmpty. Operand 3895 states and 11588 transitions. [2021-04-15 02:42:43,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:42:43,698 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:42:43,698 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:42:43,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76650,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:42:43,899 INFO L428 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:42:43,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:42:43,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1363801801, now seen corresponding path program 479 times [2021-04-15 02:42:43,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:42:43,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993210348] [2021-04-15 02:42:43,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:42:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:42:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:42:44,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993210348] [2021-04-15 02:42:44,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003975788] [2021-04-15 02:42:44,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:42:44,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:42:44,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:42:44,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:42:44,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:42:45,397 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:42:45,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:42:45,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:42:46,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:42:46,602 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:42:46,602 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:42:46,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:42:51,303 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:42:51,330 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:42:51,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:42:51,331 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:42:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:42:51,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:42:51,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:42:51,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665321397] [2021-04-15 02:42:51,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:42:51,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:42:51,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:42:51,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:42:51,422 INFO L87 Difference]: Start difference. First operand 3895 states and 11588 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:55,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:42:55,849 INFO L93 Difference]: Finished difference Result 5005 states and 14576 transitions. [2021-04-15 02:42:55,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-04-15 02:42:55,852 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:42:55,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:42:55,858 INFO L225 Difference]: With dead ends: 5005 [2021-04-15 02:42:55,858 INFO L226 Difference]: Without dead ends: 4985 [2021-04-15 02:42:55,859 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 3570.4ms TimeCoverageRelationStatistics Valid=623, Invalid=4489, Unknown=0, NotChecked=0, Total=5112 [2021-04-15 02:42:55,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4985 states. [2021-04-15 02:42:55,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4985 to 4083. [2021-04-15 02:42:55,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4083 states, 4082 states have (on average 2.976972072513474) internal successors, (12152), 4082 states have internal predecessors, (12152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:55,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4083 states to 4083 states and 12152 transitions. [2021-04-15 02:42:55,915 INFO L78 Accepts]: Start accepts. Automaton has 4083 states and 12152 transitions. Word has length 22 [2021-04-15 02:42:55,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:42:55,915 INFO L480 AbstractCegarLoop]: Abstraction has 4083 states and 12152 transitions. [2021-04-15 02:42:55,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:55,915 INFO L276 IsEmpty]: Start isEmpty. Operand 4083 states and 12152 transitions. [2021-04-15 02:42:55,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:42:55,919 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:42:55,919 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:42:56,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76817 [2021-04-15 02:42:56,120 INFO L428 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:42:56,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:42:56,120 INFO L82 PathProgramCache]: Analyzing trace with hash 518830349, now seen corresponding path program 480 times [2021-04-15 02:42:56,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:42:56,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571462753] [2021-04-15 02:42:56,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:42:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:42:56,523 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:42:56,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571462753] [2021-04-15 02:42:56,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68381052] [2021-04-15 02:42:56,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:42:56,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:42:56,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:42:56,544 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:42:56,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:42:57,565 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:42:57,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:42:57,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:42:59,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:42:59,851 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:42:59,852 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:42:59,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:43:01,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:43:01,220 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:43:01,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:43:01,221 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:43:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:43:01,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:43:01,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 02:43:01,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464748831] [2021-04-15 02:43:01,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 02:43:01,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:43:01,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 02:43:01,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:43:01,278 INFO L87 Difference]: Start difference. First operand 4083 states and 12152 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:43:04,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:43:04,299 INFO L93 Difference]: Finished difference Result 5156 states and 15134 transitions. [2021-04-15 02:43:04,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 02:43:04,301 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:43:04,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:43:04,307 INFO L225 Difference]: With dead ends: 5156 [2021-04-15 02:43:04,307 INFO L226 Difference]: Without dead ends: 5141 [2021-04-15 02:43:04,307 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 3064.0ms TimeCoverageRelationStatistics Valid=496, Invalid=3536, Unknown=0, NotChecked=0, Total=4032 [2021-04-15 02:43:04,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5141 states. [2021-04-15 02:43:04,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5141 to 4045. [2021-04-15 02:43:04,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4045 states, 4044 states have (on average 2.9772502472799207) internal successors, (12040), 4044 states have internal predecessors, (12040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:43:04,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4045 states to 4045 states and 12040 transitions. [2021-04-15 02:43:04,354 INFO L78 Accepts]: Start accepts. Automaton has 4045 states and 12040 transitions. Word has length 22 [2021-04-15 02:43:04,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:43:04,354 INFO L480 AbstractCegarLoop]: Abstraction has 4045 states and 12040 transitions. [2021-04-15 02:43:04,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:43:04,354 INFO L276 IsEmpty]: Start isEmpty. Operand 4045 states and 12040 transitions. [2021-04-15 02:43:04,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:43:04,357 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:43:04,357 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:43:04,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77845,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:43:04,558 INFO L428 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:43:04,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:43:04,558 INFO L82 PathProgramCache]: Analyzing trace with hash 94519113, now seen corresponding path program 481 times [2021-04-15 02:43:04,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:43:04,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354130759] [2021-04-15 02:43:04,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:43:04,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:43:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:43:04,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354130759] [2021-04-15 02:43:04,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662640522] [2021-04-15 02:43:04,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:43:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:43:04,920 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:43:04,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:43:05,996 INFO L244 Elim1Store]: Index analysis took 106 ms [2021-04-15 02:43:06,330 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:43:06,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:43:06,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:43:08,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:43:09,126 WARN L205 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-04-15 02:43:09,128 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-04-15 02:43:09,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-04-15 02:43:10,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:43:10,800 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:43:10,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:43:10,802 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-04-15 02:43:10,890 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:43:10,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:43:10,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 02:43:10,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266178684] [2021-04-15 02:43:10,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 02:43:10,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:43:10,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 02:43:10,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:43:10,891 INFO L87 Difference]: Start difference. First operand 4045 states and 12040 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:43:14,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:43:14,373 INFO L93 Difference]: Finished difference Result 4502 states and 13222 transitions. [2021-04-15 02:43:14,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:43:14,376 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:43:14,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:43:14,382 INFO L225 Difference]: With dead ends: 4502 [2021-04-15 02:43:14,382 INFO L226 Difference]: Without dead ends: 4492 [2021-04-15 02:43:14,383 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 3239.7ms TimeCoverageRelationStatistics Valid=411, Invalid=2895, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 02:43:14,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4492 states. [2021-04-15 02:43:14,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4492 to 4046. [2021-04-15 02:43:14,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4046 states, 4045 states have (on average 2.97725587144623) internal successors, (12043), 4045 states have internal predecessors, (12043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:43:14,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4046 states to 4046 states and 12043 transitions. [2021-04-15 02:43:14,465 INFO L78 Accepts]: Start accepts. Automaton has 4046 states and 12043 transitions. Word has length 22 [2021-04-15 02:43:14,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:43:14,465 INFO L480 AbstractCegarLoop]: Abstraction has 4046 states and 12043 transitions. [2021-04-15 02:43:14,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:43:14,465 INFO L276 IsEmpty]: Start isEmpty. Operand 4046 states and 12043 transitions. [2021-04-15 02:43:14,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:43:14,469 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:43:14,469 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:43:14,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78615 [2021-04-15 02:43:14,669 INFO L428 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:43:14,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:43:14,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1981471505, now seen corresponding path program 482 times [2021-04-15 02:43:14,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:43:14,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256501156] [2021-04-15 02:43:14,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:43:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:43:14,907 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:43:14,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256501156] [2021-04-15 02:43:14,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741262361] [2021-04-15 02:43:14,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:43:14,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:43:14,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:43:14,926 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:43:14,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:43:16,117 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:43:16,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:43:16,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:43:17,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:43:17,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:43:17,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:43:17,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:43:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:43:17,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:43:17,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:43:17,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882637382] [2021-04-15 02:43:17,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:43:17,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:43:17,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:43:17,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:43:17,484 INFO L87 Difference]: Start difference. First operand 4046 states and 12043 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-04-15 02:43:17,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:43:18,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79434,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:43:18,028 WARN L545 AbstractCegarLoop]: Verification canceled [2021-04-15 02:43:18,032 WARN L224 ceAbstractionStarter]: Timeout [2021-04-15 02:43:18,032 INFO L202 PluginConnector]: Adding new model unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 02:43:18 BasicIcfg [2021-04-15 02:43:18,032 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 02:43:18,032 INFO L168 Benchmark]: Toolchain (without parser) took 891551.61 ms. Allocated memory was 255.9 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 236.5 MB in the beginning and 736.2 MB in the end (delta: -499.7 MB). Peak memory consumption was 994.0 MB. Max. memory is 16.0 GB. [2021-04-15 02:43:18,033 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.4 MB in the end (delta: 181.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 02:43:18,033 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.55 ms. Allocated memory is still 255.9 MB. Free memory was 236.3 MB in the beginning and 234.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 02:43:18,033 INFO L168 Benchmark]: Boogie Preprocessor took 14.43 ms. Allocated memory is still 255.9 MB. Free memory was 234.9 MB in the beginning and 234.0 MB in the end (delta: 854.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 02:43:18,033 INFO L168 Benchmark]: RCFGBuilder took 208.00 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 236.3 MB in the end (delta: -2.3 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.0 GB. [2021-04-15 02:43:18,033 INFO L168 Benchmark]: TraceAbstraction took 891299.38 ms. Allocated memory was 255.9 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 235.6 MB in the beginning and 736.2 MB in the end (delta: -500.6 MB). Peak memory consumption was 991.1 MB. Max. memory is 16.0 GB. [2021-04-15 02:43:18,033 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.4 MB in the end (delta: 181.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.55 ms. Allocated memory is still 255.9 MB. Free memory was 236.3 MB in the beginning and 234.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.43 ms. Allocated memory is still 255.9 MB. Free memory was 234.9 MB in the beginning and 234.0 MB in the end (delta: 854.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 208.00 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 236.3 MB in the end (delta: -2.3 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 891299.38 ms. Allocated memory was 255.9 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 235.6 MB in the beginning and 736.2 MB in the end (delta: -500.6 MB). Peak memory consumption was 991.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 57). Cancelled while BasicCegarLoop was constructing difference of abstraction (4046states) and FLOYD_HOARE automaton (currently 10 states, 29 states before enhancement),while ReachableStatesComputation was computing reachable states (16 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 891217.4ms, OverallIterations: 490, TraceHistogramMax: 8, EmptinessCheckTime: 684.7ms, AutomataDifference: 287161.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 30.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10758 SDtfs, 24912 SDslu, 98363 SDs, 0 SdLazy, 219733 SolverSat, 19103 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 84772.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19644 GetRequests, 6479 SyntacticMatches, 122 SemanticMatches, 13043 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110560 ImplicationChecksByTransitivity, 241900.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5602occurred in iteration=314, InterpolantAutomatonStates: 10938, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 9229.8ms AutomataMinimizationTime, 489 MinimizatonAttempts, 111582 StatesRemovedByMinimization, 487 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1257.9ms SsaConstructionTime, 4299.6ms SatisfiabilityAnalysisTime, 483936.1ms InterpolantComputationTime, 18629 NumberOfCodeBlocks, 18629 NumberOfCodeBlocksAsserted, 1937 NumberOfCheckSat, 17653 ConstructedInterpolants, 0 QuantifiedInterpolants, 179044 SizeOfPredicates, 778 NumberOfNonLiveVariables, 37231 ConjunctsInSsa, 13133 ConjunctsInUnsatCore, 976 InterpolantComputations, 4 PerfectInterpolantSequences, 4654/29006 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown