/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-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 02:19:56,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 02:19:56,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 02:19:56,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-04-15 02:19:56,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-04-15 02:19:56,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-04-15 02:19:56,631 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-04-15 02:19:56,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-04-15 02:19:56,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-04-15 02:19:56,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-04-15 02:19:56,644 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-04-15 02:19:56,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-04-15 02:19:56,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-15 02:19:56,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-15 02:19:56,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-15 02:19:56,650 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-15 02:19:56,652 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-15 02:19:56,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-15 02:19:56,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-15 02:19:56,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-15 02:19:56,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-15 02:19:56,666 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-15 02:19:56,667 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-15 02:19:56,668 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-15 02:19:56,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-04-15 02:19:56,675 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-04-15 02:19:56,675 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-04-15 02:19:56,677 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-04-15 02:19:56,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-04-15 02:19:56,678 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-04-15 02:19:56,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-04-15 02:19:56,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-04-15 02:19:56,680 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-04-15 02:19:56,681 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-04-15 02:19:56,682 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-04-15 02:19:56,682 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-04-15 02:19:56,683 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-04-15 02:19:56,683 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-04-15 02:19:56,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-15 02:19:56,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-15 02:19:56,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-15 02:19:56,688 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 02:19:56,728 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 02:19:56,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 02:19:56,728 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 02:19:56,729 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 02:19:56,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 02:19:56,732 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 02:19:56,732 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 02:19:56,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 02:19:56,732 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 02:19:56,733 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 02:19:56,733 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 02:19:56,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 02:19:56,734 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 02:19:56,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 02:19:56,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 02:19:56,734 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 02:19:56,734 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 02:19:56,734 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 02:19:56,735 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 02:19:56,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 02:19:56,735 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 02:19:56,735 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 02:19:56,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 02:19:56,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 02:19:56,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 02:19:56,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 02:19:56,736 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 02:19:56,736 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 02:19:56,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 02:19:56,737 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 02:19:56,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 02:19:56,737 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 02:19:57,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 02:19:57,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 02:19:57,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 02:19:57,089 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 02:19:57,090 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 02:19:57,091 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-3.wvr.bpl [2021-04-15 02:19:57,091 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-3.wvr.bpl' [2021-04-15 02:19:57,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 02:19:57,120 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 02:19:57,122 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 02:19:57,122 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 02:19:57,122 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 02:19:57,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:19:57" (1/1) ... [2021-04-15 02:19:57,141 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:19:57" (1/1) ... [2021-04-15 02:19:57,147 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 02:19:57,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 02:19:57,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 02:19:57,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 02:19:57,156 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:19:57" (1/1) ... [2021-04-15 02:19:57,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:19:57" (1/1) ... [2021-04-15 02:19:57,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:19:57" (1/1) ... [2021-04-15 02:19:57,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:19:57" (1/1) ... [2021-04-15 02:19:57,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:19:57" (1/1) ... [2021-04-15 02:19:57,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:19:57" (1/1) ... [2021-04-15 02:19:57,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:19:57" (1/1) ... [2021-04-15 02:19:57,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 02:19:57,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 02:19:57,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 02:19:57,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 02:19:57,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:19:57" (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 02:19:57,241 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 02:19:57,242 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 02:19:57,242 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 02:19:57,242 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 02:19:57,242 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 02:19:57,242 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 02:19:57,242 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 02:19:57,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 02:19:57,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 02:19:57,243 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 02:19:57,517 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 02:19:57,517 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-04-15 02:19:57,518 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-04-15 02:19:57,518 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-04-15 02:19:57,519 INFO L202 PluginConnector]: Adding new model unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 02:19:57 BoogieIcfgContainer [2021-04-15 02:19:57,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 02:19:57,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 02:19:57,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 02:19:57,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 02:19:57,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:19:57" (1/2) ... [2021-04-15 02:19:57,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72946331 and model type unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 02:19:57, skipping insertion in model container [2021-04-15 02:19:57,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 02:19:57" (2/2) ... [2021-04-15 02:19:57,526 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.bpl [2021-04-15 02:19:57,530 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 02:19:57,530 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 02:19:57,533 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 02:19:57,534 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 02:19:57,557 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-04-15 02:19:57,574 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-04-15 02:19:57,609 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 02:19:57,609 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 02:19:57,610 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 02:19:57,610 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 02:19:57,610 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 02:19:57,610 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 02:19:57,610 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 02:19:57,610 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 02:19:57,618 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-04-15 02:19:57,627 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 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 02:19:57,629 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 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 02:19:57,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-04-15 02:19:57,633 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:57,634 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:57,634 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:57,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:57,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1034851945, now seen corresponding path program 1 times [2021-04-15 02:19:57,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:57,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701993276] [2021-04-15 02:19:57,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:57,798 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 02:19:57,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701993276] [2021-04-15 02:19:57,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:19:57,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-04-15 02:19:57,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554165244] [2021-04-15 02:19:57,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 02:19:57,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:57,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 02:19:57,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 02:19:57,819 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:57,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:57,849 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-04-15 02:19:57,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 02:19:57,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-04-15 02:19:57,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:57,857 INFO L225 Difference]: With dead ends: 22 [2021-04-15 02:19:57,857 INFO L226 Difference]: Without dead ends: 19 [2021-04-15 02:19:57,859 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 02:19:57,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-04-15 02:19:57,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-04-15 02:19:57,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 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 02:19:57,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-04-15 02:19:57,888 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-04-15 02:19:57,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:57,889 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-04-15 02:19:57,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:57,889 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-04-15 02:19:57,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-04-15 02:19:57,890 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:57,890 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:57,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 02:19:57,891 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:57,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:57,894 INFO L82 PathProgramCache]: Analyzing trace with hash -619637623, now seen corresponding path program 1 times [2021-04-15 02:19:57,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:57,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278132034] [2021-04-15 02:19:57,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:57,972 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 02:19:57,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278132034] [2021-04-15 02:19:57,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953784595] [2021-04-15 02:19:57,973 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 02:19:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:58,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-04-15 02:19:58,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:58,118 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 02:19:58,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:58,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-04-15 02:19:58,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108949374] [2021-04-15 02:19:58,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:19:58,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:58,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:19:58,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:19:58,123 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:58,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:58,175 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-04-15 02:19:58,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 02:19:58,177 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have 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 02:19:58,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:58,179 INFO L225 Difference]: With dead ends: 28 [2021-04-15 02:19:58,179 INFO L226 Difference]: Without dead ends: 28 [2021-04-15 02:19:58,180 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:19:58,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-04-15 02:19:58,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-04-15 02:19:58,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 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 02:19:58,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-04-15 02:19:58,192 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-04-15 02:19:58,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:58,192 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-04-15 02:19:58,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:58,193 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-04-15 02:19:58,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-04-15 02:19:58,194 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:58,194 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:58,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-04-15 02:19:58,413 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:58,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:58,414 INFO L82 PathProgramCache]: Analyzing trace with hash 2038710898, now seen corresponding path program 1 times [2021-04-15 02:19:58,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:58,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577963773] [2021-04-15 02:19:58,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:58,452 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 02:19:58,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577963773] [2021-04-15 02:19:58,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:19:58,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 02:19:58,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849280433] [2021-04-15 02:19:58,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 02:19:58,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:58,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 02:19:58,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:19:58,454 INFO L87 Difference]: Start difference. First operand 19 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 02:19:58,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:58,479 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-04-15 02:19:58,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:19:58,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 02:19:58,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:58,481 INFO L225 Difference]: With dead ends: 22 [2021-04-15 02:19:58,481 INFO L226 Difference]: Without dead ends: 18 [2021-04-15 02:19:58,481 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:19:58,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-04-15 02:19:58,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-04-15 02:19:58,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:58,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-04-15 02:19:58,499 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-04-15 02:19:58,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:58,500 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-04-15 02:19:58,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 02:19:58,500 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-04-15 02:19:58,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-04-15 02:19:58,500 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:58,500 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:58,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 02:19:58,501 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:58,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:58,501 INFO L82 PathProgramCache]: Analyzing trace with hash 298365290, now seen corresponding path program 2 times [2021-04-15 02:19:58,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:58,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833392840] [2021-04-15 02:19:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:58,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:58,548 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 02:19:58,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833392840] [2021-04-15 02:19:58,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:19:58,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 02:19:58,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629919224] [2021-04-15 02:19:58,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 02:19:58,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:58,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 02:19:58,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:19:58,552 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 02:19:58,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:58,574 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-04-15 02:19:58,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 02:19:58,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 02:19:58,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:58,578 INFO L225 Difference]: With dead ends: 20 [2021-04-15 02:19:58,578 INFO L226 Difference]: Without dead ends: 20 [2021-04-15 02:19:58,578 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:19:58,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-04-15 02:19:58,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-04-15 02:19:58,586 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 02:19:58,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-04-15 02:19:58,587 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-04-15 02:19:58,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:58,587 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-04-15 02:19:58,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 02:19:58,588 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-04-15 02:19:58,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-15 02:19:58,588 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:58,588 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:58,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-15 02:19:58,588 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:58,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:58,589 INFO L82 PathProgramCache]: Analyzing trace with hash -2005825454, now seen corresponding path program 1 times [2021-04-15 02:19:58,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:58,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505811287] [2021-04-15 02:19:58,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:58,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:58,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505811287] [2021-04-15 02:19:58,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391052654] [2021-04-15 02:19:58,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:19:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:58,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 02:19:58,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:58,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:58,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-04-15 02:19:58,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611163438] [2021-04-15 02:19:58,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 02:19:58,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:58,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 02:19:58,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:19:58,743 INFO L87 Difference]: Start difference. First operand 20 states and 35 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 02:19:58,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:58,801 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-04-15 02:19:58,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 02:19:58,809 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 02:19:58,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:58,809 INFO L225 Difference]: With dead ends: 24 [2021-04-15 02:19:58,810 INFO L226 Difference]: Without dead ends: 24 [2021-04-15 02:19:58,810 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:19:58,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-04-15 02:19:58,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-04-15 02:19:58,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:58,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-04-15 02:19:58,813 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-04-15 02:19:58,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:58,813 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-04-15 02:19:58,813 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 02:19:58,813 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-04-15 02:19:58,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-15 02:19:58,814 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:58,814 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:59,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:59,033 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:59,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:59,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1462566514, now seen corresponding path program 2 times [2021-04-15 02:19:59,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:59,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818308423] [2021-04-15 02:19:59,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:59,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818308423] [2021-04-15 02:19:59,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424531619] [2021-04-15 02:19:59,066 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 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 02:19:59,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:19:59,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:59,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 02:19:59,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:59,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:59,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-04-15 02:19:59,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444946419] [2021-04-15 02:19:59,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:19:59,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:59,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:19:59,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:19:59,135 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 02:19:59,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:59,160 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-04-15 02:19:59,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:19:59,160 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 02:19:59,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:59,161 INFO L225 Difference]: With dead ends: 28 [2021-04-15 02:19:59,161 INFO L226 Difference]: Without dead ends: 28 [2021-04-15 02:19:59,161 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:19:59,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-04-15 02:19:59,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-04-15 02:19:59,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:59,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2021-04-15 02:19:59,165 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 12 [2021-04-15 02:19:59,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:59,165 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2021-04-15 02:19:59,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 02:19:59,166 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2021-04-15 02:19:59,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:19:59,166 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:59,166 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:59,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:59,377 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:59,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:59,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1608535122, now seen corresponding path program 3 times [2021-04-15 02:19:59,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:59,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453263367] [2021-04-15 02:19:59,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:59,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:59,421 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 02:19:59,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453263367] [2021-04-15 02:19:59,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360808309] [2021-04-15 02:19:59,422 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 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 02:19:59,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:19:59,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:59,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:19:59,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:59,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:19:59,620 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 02:19:59,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:19:59,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:19:59,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:19:59,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-04-15 02:19:59,676 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 02:19:59,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:59,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-04-15 02:19:59,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974492921] [2021-04-15 02:19:59,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:19:59,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:59,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:19:59,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:19:59,679 INFO L87 Difference]: Start difference. First operand 28 states and 51 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 02:19:59,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:59,739 INFO L93 Difference]: Finished difference Result 67 states and 119 transitions. [2021-04-15 02:19:59,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:19:59,741 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 13 [2021-04-15 02:19:59,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:59,743 INFO L225 Difference]: With dead ends: 67 [2021-04-15 02:19:59,743 INFO L226 Difference]: Without dead ends: 64 [2021-04-15 02:19:59,744 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:19:59,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-04-15 02:19:59,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 39. [2021-04-15 02:19:59,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:59,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 82 transitions. [2021-04-15 02:19:59,749 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 82 transitions. Word has length 13 [2021-04-15 02:19:59,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:59,749 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 82 transitions. [2021-04-15 02:19:59,749 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 02:19:59,749 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 82 transitions. [2021-04-15 02:19:59,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:19:59,750 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:59,750 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:59,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:59,976 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:59,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:59,976 INFO L82 PathProgramCache]: Analyzing trace with hash -942907630, now seen corresponding path program 4 times [2021-04-15 02:19:59,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:59,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021007501] [2021-04-15 02:19:59,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:00,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:00,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021007501] [2021-04-15 02:20:00,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468345314] [2021-04-15 02:20:00,022 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:00,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:00,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:00,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:00,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:00,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:00,148 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 02:20:00,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:20:00,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:00,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:20:00,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-04-15 02:20:00,197 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 02:20:00,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:00,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-04-15 02:20:00,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291143345] [2021-04-15 02:20:00,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:20:00,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:00,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:20:00,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:20:00,200 INFO L87 Difference]: Start difference. First operand 39 states and 82 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 02:20:00,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:00,250 INFO L93 Difference]: Finished difference Result 75 states and 144 transitions. [2021-04-15 02:20:00,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:20:00,251 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 13 [2021-04-15 02:20:00,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:00,252 INFO L225 Difference]: With dead ends: 75 [2021-04-15 02:20:00,252 INFO L226 Difference]: Without dead ends: 72 [2021-04-15 02:20:00,252 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:20:00,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-04-15 02:20:00,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 45. [2021-04-15 02:20:00,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.340909090909091) internal successors, (103), 44 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:00,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 103 transitions. [2021-04-15 02:20:00,270 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 103 transitions. Word has length 13 [2021-04-15 02:20:00,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:00,270 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 103 transitions. [2021-04-15 02:20:00,271 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 02:20:00,271 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 103 transitions. [2021-04-15 02:20:00,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:20:00,273 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:00,274 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:00,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-04-15 02:20:00,489 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:00,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:00,489 INFO L82 PathProgramCache]: Analyzing trace with hash -317115318, now seen corresponding path program 5 times [2021-04-15 02:20:00,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:00,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164640078] [2021-04-15 02:20:00,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:00,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:00,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164640078] [2021-04-15 02:20:00,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783575249] [2021-04-15 02:20:00,529 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 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 02:20:00,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:20:00,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:00,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:00,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:00,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:00,660 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 02:20:00,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:20:00,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:00,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:20:00,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-04-15 02:20:00,686 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 02:20:00,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:00,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-04-15 02:20:00,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899104768] [2021-04-15 02:20:00,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:20:00,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:00,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:20:00,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:20:00,688 INFO L87 Difference]: Start difference. First operand 45 states and 103 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 02:20:00,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:00,751 INFO L93 Difference]: Finished difference Result 83 states and 169 transitions. [2021-04-15 02:20:00,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:20:00,751 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 13 [2021-04-15 02:20:00,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:00,752 INFO L225 Difference]: With dead ends: 83 [2021-04-15 02:20:00,753 INFO L226 Difference]: Without dead ends: 80 [2021-04-15 02:20:00,753 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:20:00,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-04-15 02:20:00,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2021-04-15 02:20:00,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:00,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2021-04-15 02:20:00,769 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 13 [2021-04-15 02:20:00,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:00,769 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2021-04-15 02:20:00,770 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 02:20:00,770 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2021-04-15 02:20:00,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:20:00,770 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:00,770 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:00,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:00,993 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:00,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:00,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1902577170, now seen corresponding path program 6 times [2021-04-15 02:20:00,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:00,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483922730] [2021-04-15 02:20:00,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:01,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483922730] [2021-04-15 02:20:01,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560545421] [2021-04-15 02:20:01,041 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 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 02:20:01,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:20:01,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:01,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:20:01,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:01,193 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:01,194 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 02:20:01,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:20:01,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:01,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:20:01,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-04-15 02:20:01,225 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 02:20:01,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:01,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-04-15 02:20:01,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835126558] [2021-04-15 02:20:01,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:20:01,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:01,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:20:01,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:20:01,227 INFO L87 Difference]: Start difference. First operand 52 states and 127 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 02:20:01,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:01,292 INFO L93 Difference]: Finished difference Result 92 states and 197 transitions. [2021-04-15 02:20:01,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:20:01,292 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 13 [2021-04-15 02:20:01,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:01,294 INFO L225 Difference]: With dead ends: 92 [2021-04-15 02:20:01,294 INFO L226 Difference]: Without dead ends: 89 [2021-04-15 02:20:01,295 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:20:01,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-04-15 02:20:01,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 61. [2021-04-15 02:20:01,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5833333333333335) internal successors, (155), 60 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:01,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 155 transitions. [2021-04-15 02:20:01,305 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 155 transitions. Word has length 13 [2021-04-15 02:20:01,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:01,305 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 155 transitions. [2021-04-15 02:20:01,305 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 02:20:01,306 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 155 transitions. [2021-04-15 02:20:01,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:20:01,306 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:01,306 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:01,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-04-15 02:20:01,521 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:01,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:01,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1838594674, now seen corresponding path program 7 times [2021-04-15 02:20:01,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:01,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290958849] [2021-04-15 02:20:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:01,578 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 02:20:01,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290958849] [2021-04-15 02:20:01,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676003272] [2021-04-15 02:20:01,578 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 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 02:20:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:01,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:20:01,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:01,690 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 02:20:01,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:01,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-04-15 02:20:01,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105288569] [2021-04-15 02:20:01,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:20:01,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:01,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:20:01,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:20:01,692 INFO L87 Difference]: Start difference. First operand 61 states and 155 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 02:20:01,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:01,780 INFO L93 Difference]: Finished difference Result 114 states and 226 transitions. [2021-04-15 02:20:01,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:20:01,781 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 02:20:01,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:01,781 INFO L225 Difference]: With dead ends: 114 [2021-04-15 02:20:01,782 INFO L226 Difference]: Without dead ends: 114 [2021-04-15 02:20:01,782 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:01,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-04-15 02:20:01,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 62. [2021-04-15 02:20:01,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.6065573770491803) internal successors, (159), 61 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:01,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 159 transitions. [2021-04-15 02:20:01,786 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 159 transitions. Word has length 14 [2021-04-15 02:20:01,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:01,787 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 159 transitions. [2021-04-15 02:20:01,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 02:20:01,787 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 159 transitions. [2021-04-15 02:20:01,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:20:01,787 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:01,788 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:02,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-04-15 02:20:02,003 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:02,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:02,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1651947095, now seen corresponding path program 8 times [2021-04-15 02:20:02,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:02,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980941922] [2021-04-15 02:20:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:02,047 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 02:20:02,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980941922] [2021-04-15 02:20:02,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866741731] [2021-04-15 02:20:02,048 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 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 02:20:02,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:02,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:02,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:20:02,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:02,120 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 02:20:02,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:02,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-04-15 02:20:02,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109228131] [2021-04-15 02:20:02,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:20:02,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:02,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:20:02,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:20:02,122 INFO L87 Difference]: Start difference. First operand 62 states and 159 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 02:20:02,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:02,256 INFO L93 Difference]: Finished difference Result 121 states and 252 transitions. [2021-04-15 02:20:02,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:20:02,256 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 02:20:02,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:02,257 INFO L225 Difference]: With dead ends: 121 [2021-04-15 02:20:02,257 INFO L226 Difference]: Without dead ends: 116 [2021-04-15 02:20:02,258 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:20:02,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-04-15 02:20:02,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2021-04-15 02:20:02,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.5945945945945947) internal successors, (192), 74 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:02,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 192 transitions. [2021-04-15 02:20:02,268 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 192 transitions. Word has length 14 [2021-04-15 02:20:02,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:02,269 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 192 transitions. [2021-04-15 02:20:02,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 02:20:02,269 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 192 transitions. [2021-04-15 02:20:02,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:20:02,271 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:02,271 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:02,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:02,481 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:02,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:02,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1032606612, now seen corresponding path program 9 times [2021-04-15 02:20:02,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:02,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242491247] [2021-04-15 02:20:02,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:02,543 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 02:20:02,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242491247] [2021-04-15 02:20:02,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499810387] [2021-04-15 02:20:02,544 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 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 02:20:02,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:20:02,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:02,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:02,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:02,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:02,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:02,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-04-15 02:20:02,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765501212] [2021-04-15 02:20:02,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:02,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:02,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:02,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:02,643 INFO L87 Difference]: Start difference. First operand 75 states and 192 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 02:20:02,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:02,932 INFO L93 Difference]: Finished difference Result 137 states and 314 transitions. [2021-04-15 02:20:02,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:20:02,933 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 14 [2021-04-15 02:20:02,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:02,934 INFO L225 Difference]: With dead ends: 137 [2021-04-15 02:20:02,935 INFO L226 Difference]: Without dead ends: 135 [2021-04-15 02:20:02,935 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 201.5ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:20:02,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-04-15 02:20:02,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2021-04-15 02:20:02,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.6116504854368934) internal successors, (269), 103 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:02,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 269 transitions. [2021-04-15 02:20:02,948 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 269 transitions. Word has length 14 [2021-04-15 02:20:02,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:02,948 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 269 transitions. [2021-04-15 02:20:02,948 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 02:20:02,948 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 269 transitions. [2021-04-15 02:20:02,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:20:02,949 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:02,949 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:03,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:03,158 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:03,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:03,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1949662965, now seen corresponding path program 10 times [2021-04-15 02:20:03,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:03,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427650403] [2021-04-15 02:20:03,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:03,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:03,203 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 02:20:03,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427650403] [2021-04-15 02:20:03,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174535843] [2021-04-15 02:20:03,204 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 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 02:20:03,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:03,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:03,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:20:03,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:03,266 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 02:20:03,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:03,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-04-15 02:20:03,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811778139] [2021-04-15 02:20:03,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:20:03,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:03,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:20:03,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:20:03,267 INFO L87 Difference]: Start difference. First operand 104 states and 269 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 02:20:03,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:03,310 INFO L93 Difference]: Finished difference Result 162 states and 349 transitions. [2021-04-15 02:20:03,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:20:03,310 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 02:20:03,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:03,311 INFO L225 Difference]: With dead ends: 162 [2021-04-15 02:20:03,311 INFO L226 Difference]: Without dead ends: 162 [2021-04-15 02:20:03,311 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:20:03,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-04-15 02:20:03,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 105. [2021-04-15 02:20:03,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.6153846153846154) internal successors, (272), 104 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:03,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 272 transitions. [2021-04-15 02:20:03,316 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 272 transitions. Word has length 14 [2021-04-15 02:20:03,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:03,316 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 272 transitions. [2021-04-15 02:20:03,316 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 02:20:03,316 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 272 transitions. [2021-04-15 02:20:03,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:20:03,317 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:03,317 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:03,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-04-15 02:20:03,539 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:03,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:03,539 INFO L82 PathProgramCache]: Analyzing trace with hash 857706217, now seen corresponding path program 11 times [2021-04-15 02:20:03,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:03,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922097599] [2021-04-15 02:20:03,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:03,589 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 02:20:03,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922097599] [2021-04-15 02:20:03,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092727312] [2021-04-15 02:20:03,589 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:03,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:20:03,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:03,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:20:03,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:03,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:03,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:03,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-04-15 02:20:03,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532151448] [2021-04-15 02:20:03,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:20:03,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:03,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:20:03,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:20:03,654 INFO L87 Difference]: Start difference. First operand 105 states and 272 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 02:20:03,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:03,732 INFO L93 Difference]: Finished difference Result 170 states and 369 transitions. [2021-04-15 02:20:03,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:20:03,733 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 02:20:03,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:03,735 INFO L225 Difference]: With dead ends: 170 [2021-04-15 02:20:03,736 INFO L226 Difference]: Without dead ends: 168 [2021-04-15 02:20:03,739 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:03,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-04-15 02:20:03,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 112. [2021-04-15 02:20:03,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.6576576576576576) internal successors, (295), 111 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:03,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 295 transitions. [2021-04-15 02:20:03,748 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 295 transitions. Word has length 14 [2021-04-15 02:20:03,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:03,748 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 295 transitions. [2021-04-15 02:20:03,748 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 02:20:03,748 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 295 transitions. [2021-04-15 02:20:03,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:20:03,749 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:03,749 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:03,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-04-15 02:20:03,965 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:03,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:03,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1719512019, now seen corresponding path program 12 times [2021-04-15 02:20:03,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:03,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080666805] [2021-04-15 02:20:03,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:03,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:04,031 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 02:20:04,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080666805] [2021-04-15 02:20:04,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204062246] [2021-04-15 02:20:04,032 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 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 02:20:04,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:20:04,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:04,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:20:04,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:04,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:04,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-04-15 02:20:04,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360933264] [2021-04-15 02:20:04,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:20:04,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:04,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:20:04,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:20:04,096 INFO L87 Difference]: Start difference. First operand 112 states and 295 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 02:20:04,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:04,156 INFO L93 Difference]: Finished difference Result 174 states and 379 transitions. [2021-04-15 02:20:04,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:20:04,156 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 02:20:04,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:04,157 INFO L225 Difference]: With dead ends: 174 [2021-04-15 02:20:04,157 INFO L226 Difference]: Without dead ends: 174 [2021-04-15 02:20:04,157 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:20:04,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-04-15 02:20:04,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 112. [2021-04-15 02:20:04,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.6576576576576576) internal successors, (295), 111 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:04,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 295 transitions. [2021-04-15 02:20:04,160 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 295 transitions. Word has length 14 [2021-04-15 02:20:04,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:04,160 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 295 transitions. [2021-04-15 02:20:04,160 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 02:20:04,160 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 295 transitions. [2021-04-15 02:20:04,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:20:04,160 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:04,160 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:04,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-04-15 02:20:04,370 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:04,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:04,370 INFO L82 PathProgramCache]: Analyzing trace with hash 846407943, now seen corresponding path program 13 times [2021-04-15 02:20:04,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:04,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099130702] [2021-04-15 02:20:04,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:04,417 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 02:20:04,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099130702] [2021-04-15 02:20:04,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109013924] [2021-04-15 02:20:04,418 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 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 02:20:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:04,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:20:04,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:04,494 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 02:20:04,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:04,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-04-15 02:20:04,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104115418] [2021-04-15 02:20:04,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:20:04,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:04,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:20:04,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:20:04,496 INFO L87 Difference]: Start difference. First operand 112 states and 295 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 02:20:04,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:04,570 INFO L93 Difference]: Finished difference Result 188 states and 405 transitions. [2021-04-15 02:20:04,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:20:04,571 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 02:20:04,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:04,574 INFO L225 Difference]: With dead ends: 188 [2021-04-15 02:20:04,574 INFO L226 Difference]: Without dead ends: 188 [2021-04-15 02:20:04,574 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:04,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-04-15 02:20:04,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 114. [2021-04-15 02:20:04,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.663716814159292) internal successors, (301), 113 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:04,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 301 transitions. [2021-04-15 02:20:04,579 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 301 transitions. Word has length 14 [2021-04-15 02:20:04,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:04,580 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 301 transitions. [2021-04-15 02:20:04,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 02:20:04,580 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 301 transitions. [2021-04-15 02:20:04,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:20:04,580 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:04,580 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:04,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:04,803 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:04,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:04,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1217568591, now seen corresponding path program 14 times [2021-04-15 02:20:04,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:04,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18821759] [2021-04-15 02:20:04,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:04,835 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 02:20:04,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18821759] [2021-04-15 02:20:04,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820016584] [2021-04-15 02:20:04,836 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 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 02:20:04,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:04,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:04,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:20:04,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:04,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:04,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:04,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-04-15 02:20:04,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120623968] [2021-04-15 02:20:04,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:20:04,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:04,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:20:04,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:20:04,906 INFO L87 Difference]: Start difference. First operand 114 states and 301 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 02:20:04,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:04,973 INFO L93 Difference]: Finished difference Result 182 states and 405 transitions. [2021-04-15 02:20:04,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:20:04,973 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 02:20:04,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:04,974 INFO L225 Difference]: With dead ends: 182 [2021-04-15 02:20:04,974 INFO L226 Difference]: Without dead ends: 180 [2021-04-15 02:20:04,974 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:04,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-04-15 02:20:04,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 124. [2021-04-15 02:20:04,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.707317073170732) internal successors, (333), 123 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:04,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 333 transitions. [2021-04-15 02:20:04,979 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 333 transitions. Word has length 14 [2021-04-15 02:20:04,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:04,980 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 333 transitions. [2021-04-15 02:20:04,980 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 02:20:04,980 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 333 transitions. [2021-04-15 02:20:04,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:20:04,981 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:04,981 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:05,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-04-15 02:20:05,197 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:05,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:05,197 INFO L82 PathProgramCache]: Analyzing trace with hash 500180469, now seen corresponding path program 15 times [2021-04-15 02:20:05,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:05,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75051268] [2021-04-15 02:20:05,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:05,232 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 02:20:05,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75051268] [2021-04-15 02:20:05,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773640018] [2021-04-15 02:20:05,232 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 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 02:20:05,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:20:05,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:05,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:20:05,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:05,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:05,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-04-15 02:20:05,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876888878] [2021-04-15 02:20:05,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:20:05,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:05,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:20:05,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:20:05,301 INFO L87 Difference]: Start difference. First operand 124 states and 333 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 02:20:05,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:05,337 INFO L93 Difference]: Finished difference Result 185 states and 412 transitions. [2021-04-15 02:20:05,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:20:05,338 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 02:20:05,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:05,339 INFO L225 Difference]: With dead ends: 185 [2021-04-15 02:20:05,339 INFO L226 Difference]: Without dead ends: 185 [2021-04-15 02:20:05,339 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:20:05,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-04-15 02:20:05,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 124. [2021-04-15 02:20:05,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.707317073170732) internal successors, (333), 123 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:05,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 333 transitions. [2021-04-15 02:20:05,344 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 333 transitions. Word has length 14 [2021-04-15 02:20:05,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:05,344 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 333 transitions. [2021-04-15 02:20:05,344 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 02:20:05,344 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 333 transitions. [2021-04-15 02:20:05,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:20:05,345 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:05,345 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:05,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:05,569 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:05,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:05,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1228866865, now seen corresponding path program 16 times [2021-04-15 02:20:05,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:05,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538867621] [2021-04-15 02:20:05,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:05,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:05,609 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 02:20:05,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538867621] [2021-04-15 02:20:05,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252273086] [2021-04-15 02:20:05,610 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:05,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:05,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:05,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:20:05,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:05,700 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 02:20:05,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:05,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-04-15 02:20:05,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014891286] [2021-04-15 02:20:05,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:20:05,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:05,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:20:05,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:20:05,702 INFO L87 Difference]: Start difference. First operand 124 states and 333 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 02:20:05,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:05,778 INFO L93 Difference]: Finished difference Result 194 states and 429 transitions. [2021-04-15 02:20:05,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:20:05,779 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 02:20:05,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:05,780 INFO L225 Difference]: With dead ends: 194 [2021-04-15 02:20:05,780 INFO L226 Difference]: Without dead ends: 194 [2021-04-15 02:20:05,780 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:05,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-04-15 02:20:05,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 124. [2021-04-15 02:20:05,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.707317073170732) internal successors, (333), 123 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:05,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 333 transitions. [2021-04-15 02:20:05,785 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 333 transitions. Word has length 14 [2021-04-15 02:20:05,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:05,786 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 333 transitions. [2021-04-15 02:20:05,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 02:20:05,786 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 333 transitions. [2021-04-15 02:20:05,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:20:05,789 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:05,789 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:06,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-04-15 02:20:06,011 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:06,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:06,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1005240629, now seen corresponding path program 17 times [2021-04-15 02:20:06,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:06,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481912583] [2021-04-15 02:20:06,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:06,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:06,058 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 02:20:06,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481912583] [2021-04-15 02:20:06,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382374012] [2021-04-15 02:20:06,059 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 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 02:20:06,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:20:06,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:06,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:20:06,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:06,130 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 02:20:06,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:06,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-04-15 02:20:06,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83378293] [2021-04-15 02:20:06,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:20:06,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:06,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:20:06,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:20:06,132 INFO L87 Difference]: Start difference. First operand 124 states and 333 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 02:20:06,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:06,239 INFO L93 Difference]: Finished difference Result 201 states and 462 transitions. [2021-04-15 02:20:06,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:20:06,239 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 02:20:06,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:06,241 INFO L225 Difference]: With dead ends: 201 [2021-04-15 02:20:06,241 INFO L226 Difference]: Without dead ends: 201 [2021-04-15 02:20:06,241 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:06,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-04-15 02:20:06,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 132. [2021-04-15 02:20:06,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.7404580152671754) internal successors, (359), 131 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:06,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 359 transitions. [2021-04-15 02:20:06,247 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 359 transitions. Word has length 14 [2021-04-15 02:20:06,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:06,247 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 359 transitions. [2021-04-15 02:20:06,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 02:20:06,247 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 359 transitions. [2021-04-15 02:20:06,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:20:06,248 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:06,248 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:06,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-04-15 02:20:06,465 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:06,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:06,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1126578199, now seen corresponding path program 18 times [2021-04-15 02:20:06,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:06,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471245595] [2021-04-15 02:20:06,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:06,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:06,515 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 02:20:06,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471245595] [2021-04-15 02:20:06,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833200508] [2021-04-15 02:20:06,516 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 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 02:20:06,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:20:06,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:06,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:20:06,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:06,615 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 02:20:06,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:06,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-04-15 02:20:06,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566463159] [2021-04-15 02:20:06,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:20:06,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:06,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:20:06,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:20:06,616 INFO L87 Difference]: Start difference. First operand 132 states and 359 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 02:20:06,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:06,719 INFO L93 Difference]: Finished difference Result 208 states and 487 transitions. [2021-04-15 02:20:06,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:20:06,719 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 14 [2021-04-15 02:20:06,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:06,721 INFO L225 Difference]: With dead ends: 208 [2021-04-15 02:20:06,721 INFO L226 Difference]: Without dead ends: 206 [2021-04-15 02:20:06,722 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:06,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-04-15 02:20:06,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 151. [2021-04-15 02:20:06,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.8) internal successors, (420), 150 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:06,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 420 transitions. [2021-04-15 02:20:06,728 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 420 transitions. Word has length 14 [2021-04-15 02:20:06,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:06,728 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 420 transitions. [2021-04-15 02:20:06,728 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 02:20:06,728 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 420 transitions. [2021-04-15 02:20:06,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:20:06,729 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:06,729 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:06,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:06,945 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:06,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:06,945 INFO L82 PathProgramCache]: Analyzing trace with hash 591170861, now seen corresponding path program 19 times [2021-04-15 02:20:06,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:06,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665514748] [2021-04-15 02:20:06,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:06,992 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 02:20:06,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665514748] [2021-04-15 02:20:06,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100854589] [2021-04-15 02:20:06,992 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 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 02:20:07,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:07,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:20:07,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:07,078 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 02:20:07,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:07,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-04-15 02:20:07,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14940818] [2021-04-15 02:20:07,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:20:07,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:07,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:20:07,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:20:07,079 INFO L87 Difference]: Start difference. First operand 151 states and 420 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 02:20:07,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:07,158 INFO L93 Difference]: Finished difference Result 199 states and 469 transitions. [2021-04-15 02:20:07,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:20:07,158 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 14 [2021-04-15 02:20:07,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:07,159 INFO L225 Difference]: With dead ends: 199 [2021-04-15 02:20:07,159 INFO L226 Difference]: Without dead ends: 199 [2021-04-15 02:20:07,160 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:07,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-04-15 02:20:07,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 148. [2021-04-15 02:20:07,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.7687074829931975) internal successors, (407), 147 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:07,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 407 transitions. [2021-04-15 02:20:07,165 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 407 transitions. Word has length 14 [2021-04-15 02:20:07,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:07,165 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 407 transitions. [2021-04-15 02:20:07,165 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 02:20:07,165 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 407 transitions. [2021-04-15 02:20:07,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:20:07,166 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:07,166 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:07,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-04-15 02:20:07,381 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:07,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:07,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1137876473, now seen corresponding path program 20 times [2021-04-15 02:20:07,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:07,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89021343] [2021-04-15 02:20:07,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:07,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:07,426 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 02:20:07,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89021343] [2021-04-15 02:20:07,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415581881] [2021-04-15 02:20:07,426 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 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 02:20:07,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:07,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:07,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:20:07,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:07,515 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 02:20:07,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:07,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 02:20:07,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821449502] [2021-04-15 02:20:07,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:20:07,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:07,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:20:07,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:20:07,517 INFO L87 Difference]: Start difference. First operand 148 states and 407 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 02:20:07,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:07,623 INFO L93 Difference]: Finished difference Result 203 states and 476 transitions. [2021-04-15 02:20:07,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:20:07,623 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 14 [2021-04-15 02:20:07,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:07,624 INFO L225 Difference]: With dead ends: 203 [2021-04-15 02:20:07,624 INFO L226 Difference]: Without dead ends: 203 [2021-04-15 02:20:07,625 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:20:07,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-04-15 02:20:07,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 144. [2021-04-15 02:20:07,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.7482517482517483) internal successors, (393), 143 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:07,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 393 transitions. [2021-04-15 02:20:07,629 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 393 transitions. Word has length 14 [2021-04-15 02:20:07,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:07,629 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 393 transitions. [2021-04-15 02:20:07,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 02:20:07,630 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 393 transitions. [2021-04-15 02:20:07,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:20:07,630 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:07,630 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:07,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-04-15 02:20:07,852 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:07,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:07,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1096231021, now seen corresponding path program 21 times [2021-04-15 02:20:07,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:07,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969774611] [2021-04-15 02:20:07,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:07,911 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 02:20:07,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969774611] [2021-04-15 02:20:07,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380903619] [2021-04-15 02:20:07,911 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 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 02:20:07,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:20:07,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:07,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:20:07,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:07,983 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 02:20:07,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:07,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 02:20:07,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081345099] [2021-04-15 02:20:07,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:20:07,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:07,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:20:07,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:20:07,984 INFO L87 Difference]: Start difference. First operand 144 states and 393 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 02:20:08,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:08,082 INFO L93 Difference]: Finished difference Result 179 states and 442 transitions. [2021-04-15 02:20:08,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:20:08,089 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 14 [2021-04-15 02:20:08,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:08,090 INFO L225 Difference]: With dead ends: 179 [2021-04-15 02:20:08,090 INFO L226 Difference]: Without dead ends: 179 [2021-04-15 02:20:08,090 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:08,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-04-15 02:20:08,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2021-04-15 02:20:08,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.7357142857142858) internal successors, (383), 140 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:08,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 383 transitions. [2021-04-15 02:20:08,094 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 383 transitions. Word has length 14 [2021-04-15 02:20:08,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:08,095 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 383 transitions. [2021-04-15 02:20:08,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 02:20:08,095 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 383 transitions. [2021-04-15 02:20:08,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:20:08,095 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:08,095 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:08,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:08,313 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:08,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:08,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1634086599, now seen corresponding path program 22 times [2021-04-15 02:20:08,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:08,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787051960] [2021-04-15 02:20:08,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:08,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:08,357 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 02:20:08,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787051960] [2021-04-15 02:20:08,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120917892] [2021-04-15 02:20:08,357 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 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 02:20:08,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:08,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:08,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:20:08,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:08,465 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 02:20:08,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:08,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 02:20:08,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533860879] [2021-04-15 02:20:08,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:20:08,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:08,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:20:08,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:20:08,467 INFO L87 Difference]: Start difference. First operand 141 states and 383 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 02:20:08,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:08,633 INFO L93 Difference]: Finished difference Result 200 states and 499 transitions. [2021-04-15 02:20:08,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:20:08,633 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 14 [2021-04-15 02:20:08,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:08,634 INFO L225 Difference]: With dead ends: 200 [2021-04-15 02:20:08,634 INFO L226 Difference]: Without dead ends: 200 [2021-04-15 02:20:08,634 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:20:08,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-04-15 02:20:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 142. [2021-04-15 02:20:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.74468085106383) internal successors, (387), 141 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:08,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 387 transitions. [2021-04-15 02:20:08,638 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 387 transitions. Word has length 14 [2021-04-15 02:20:08,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:08,638 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 387 transitions. [2021-04-15 02:20:08,639 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 02:20:08,639 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 387 transitions. [2021-04-15 02:20:08,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:20:08,639 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:08,639 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:08,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-04-15 02:20:08,853 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:08,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:08,853 INFO L82 PathProgramCache]: Analyzing trace with hash 674548242, now seen corresponding path program 23 times [2021-04-15 02:20:08,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:08,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887085780] [2021-04-15 02:20:08,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:08,888 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 02:20:08,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887085780] [2021-04-15 02:20:08,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437612478] [2021-04-15 02:20:08,888 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:20:08,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:20:08,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:08,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:08,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:20:08,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:08,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-04-15 02:20:08,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40223635] [2021-04-15 02:20:08,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:20:08,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:08,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:20:08,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:20:08,984 INFO L87 Difference]: Start difference. First operand 142 states and 387 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 02:20:09,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:09,034 INFO L93 Difference]: Finished difference Result 197 states and 465 transitions. [2021-04-15 02:20:09,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:20:09,034 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 15 [2021-04-15 02:20:09,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:09,036 INFO L225 Difference]: With dead ends: 197 [2021-04-15 02:20:09,036 INFO L226 Difference]: Without dead ends: 197 [2021-04-15 02:20:09,036 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:20:09,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-04-15 02:20:09,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 146. [2021-04-15 02:20:09,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.7448275862068967) internal successors, (398), 145 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:09,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 398 transitions. [2021-04-15 02:20:09,040 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 398 transitions. Word has length 15 [2021-04-15 02:20:09,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:09,040 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 398 transitions. [2021-04-15 02:20:09,040 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 02:20:09,040 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 398 transitions. [2021-04-15 02:20:09,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:20:09,041 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:09,041 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:09,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:09,257 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:09,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:09,257 INFO L82 PathProgramCache]: Analyzing trace with hash -164351056, now seen corresponding path program 24 times [2021-04-15 02:20:09,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:09,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590176468] [2021-04-15 02:20:09,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:09,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:09,304 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 02:20:09,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590176468] [2021-04-15 02:20:09,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197397737] [2021-04-15 02:20:09,305 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 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 02:20:09,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:20:09,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:09,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:20:09,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:09,352 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:09,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:09,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-04-15 02:20:09,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41302188] [2021-04-15 02:20:09,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:20:09,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:09,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:20:09,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:20:09,353 INFO L87 Difference]: Start difference. First operand 146 states and 398 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 02:20:09,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:09,430 INFO L93 Difference]: Finished difference Result 194 states and 457 transitions. [2021-04-15 02:20:09,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:20:09,430 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 15 [2021-04-15 02:20:09,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:09,431 INFO L225 Difference]: With dead ends: 194 [2021-04-15 02:20:09,431 INFO L226 Difference]: Without dead ends: 192 [2021-04-15 02:20:09,431 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:09,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-04-15 02:20:09,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 146. [2021-04-15 02:20:09,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.731034482758621) internal successors, (396), 145 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:09,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 396 transitions. [2021-04-15 02:20:09,435 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 396 transitions. Word has length 15 [2021-04-15 02:20:09,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:09,435 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 396 transitions. [2021-04-15 02:20:09,435 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 02:20:09,435 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 396 transitions. [2021-04-15 02:20:09,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:20:09,437 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:09,437 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:09,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-04-15 02:20:09,657 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:09,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:09,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1325053940, now seen corresponding path program 25 times [2021-04-15 02:20:09,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:09,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766922295] [2021-04-15 02:20:09,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:09,701 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 02:20:09,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766922295] [2021-04-15 02:20:09,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395608312] [2021-04-15 02:20:09,702 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 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 02:20:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:09,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:20:09,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:09,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:09,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-04-15 02:20:09,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012609822] [2021-04-15 02:20:09,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:20:09,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:09,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:20:09,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:20:09,753 INFO L87 Difference]: Start difference. First operand 146 states and 396 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 02:20:09,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:09,841 INFO L93 Difference]: Finished difference Result 179 states and 439 transitions. [2021-04-15 02:20:09,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:20:09,841 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 15 [2021-04-15 02:20:09,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:09,842 INFO L225 Difference]: With dead ends: 179 [2021-04-15 02:20:09,842 INFO L226 Difference]: Without dead ends: 176 [2021-04-15 02:20:09,844 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:09,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-04-15 02:20:09,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 147. [2021-04-15 02:20:09,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.719178082191781) internal successors, (397), 146 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:09,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 397 transitions. [2021-04-15 02:20:09,848 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 397 transitions. Word has length 15 [2021-04-15 02:20:09,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:09,848 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 397 transitions. [2021-04-15 02:20:09,848 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 02:20:09,848 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 397 transitions. [2021-04-15 02:20:09,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:20:09,849 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:09,849 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:10,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-04-15 02:20:10,070 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:10,071 INFO L82 PathProgramCache]: Analyzing trace with hash 765538634, now seen corresponding path program 26 times [2021-04-15 02:20:10,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:10,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703122425] [2021-04-15 02:20:10,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:10,111 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 02:20:10,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703122425] [2021-04-15 02:20:10,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139218428] [2021-04-15 02:20:10,111 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:20:10,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:10,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:10,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:20:10,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:10,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:20:10,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:10,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-04-15 02:20:10,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511341060] [2021-04-15 02:20:10,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:20:10,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:10,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:20:10,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:20:10,175 INFO L87 Difference]: Start difference. First operand 147 states and 397 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 02:20:10,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:10,226 INFO L93 Difference]: Finished difference Result 220 states and 505 transitions. [2021-04-15 02:20:10,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:20:10,228 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 15 [2021-04-15 02:20:10,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:10,229 INFO L225 Difference]: With dead ends: 220 [2021-04-15 02:20:10,229 INFO L226 Difference]: Without dead ends: 220 [2021-04-15 02:20:10,230 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:20:10,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-04-15 02:20:10,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 151. [2021-04-15 02:20:10,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.7333333333333334) internal successors, (410), 150 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:10,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 410 transitions. [2021-04-15 02:20:10,234 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 410 transitions. Word has length 15 [2021-04-15 02:20:10,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:10,234 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 410 transitions. [2021-04-15 02:20:10,234 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 02:20:10,234 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 410 transitions. [2021-04-15 02:20:10,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:20:10,235 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:10,235 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:10,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-04-15 02:20:10,453 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:10,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:10,453 INFO L82 PathProgramCache]: Analyzing trace with hash -73360664, now seen corresponding path program 27 times [2021-04-15 02:20:10,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:10,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256403688] [2021-04-15 02:20:10,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:10,509 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 02:20:10,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256403688] [2021-04-15 02:20:10,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731592571] [2021-04-15 02:20:10,510 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:10,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:20:10,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:10,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:20:10,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:10,566 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 02:20:10,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:10,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:20:10,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555992391] [2021-04-15 02:20:10,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:20:10,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:10,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:20:10,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:20:10,567 INFO L87 Difference]: Start difference. First operand 151 states and 410 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 02:20:10,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:10,639 INFO L93 Difference]: Finished difference Result 207 states and 482 transitions. [2021-04-15 02:20:10,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:20:10,639 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 02:20:10,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:10,640 INFO L225 Difference]: With dead ends: 207 [2021-04-15 02:20:10,640 INFO L226 Difference]: Without dead ends: 205 [2021-04-15 02:20:10,641 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:10,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-04-15 02:20:10,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 151. [2021-04-15 02:20:10,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.72) internal successors, (408), 150 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:10,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 408 transitions. [2021-04-15 02:20:10,644 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 408 transitions. Word has length 15 [2021-04-15 02:20:10,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:10,645 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 408 transitions. [2021-04-15 02:20:10,645 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 02:20:10,645 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 408 transitions. [2021-04-15 02:20:10,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:20:10,645 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:10,645 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:10,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:10,857 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:10,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:10,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1416044332, now seen corresponding path program 28 times [2021-04-15 02:20:10,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:10,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842777273] [2021-04-15 02:20:10,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:10,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:10,899 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 02:20:10,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842777273] [2021-04-15 02:20:10,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926308328] [2021-04-15 02:20:10,900 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:10,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:10,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:10,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:20:10,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:10,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:10,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:10,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-04-15 02:20:10,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26665728] [2021-04-15 02:20:10,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:20:10,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:10,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:20:10,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:20:10,986 INFO L87 Difference]: Start difference. First operand 151 states and 408 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 02:20:11,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:11,073 INFO L93 Difference]: Finished difference Result 212 states and 487 transitions. [2021-04-15 02:20:11,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:20:11,073 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 15 [2021-04-15 02:20:11,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:11,074 INFO L225 Difference]: With dead ends: 212 [2021-04-15 02:20:11,074 INFO L226 Difference]: Without dead ends: 209 [2021-04-15 02:20:11,075 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:11,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-04-15 02:20:11,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 151. [2021-04-15 02:20:11,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.7133333333333334) internal successors, (407), 150 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:11,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 407 transitions. [2021-04-15 02:20:11,078 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 407 transitions. Word has length 15 [2021-04-15 02:20:11,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:11,079 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 407 transitions. [2021-04-15 02:20:11,079 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 02:20:11,079 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 407 transitions. [2021-04-15 02:20:11,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:20:11,079 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:11,079 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:11,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-04-15 02:20:11,280 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:11,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:11,280 INFO L82 PathProgramCache]: Analyzing trace with hash 342958952, now seen corresponding path program 29 times [2021-04-15 02:20:11,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:11,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469675926] [2021-04-15 02:20:11,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:11,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:11,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469675926] [2021-04-15 02:20:11,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092629083] [2021-04-15 02:20:11,329 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:20:11,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:20:11,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:11,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:20:11,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:11,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:11,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-04-15 02:20:11,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509217440] [2021-04-15 02:20:11,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:20:11,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:11,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:20:11,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:20:11,418 INFO L87 Difference]: Start difference. First operand 151 states and 407 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 02:20:11,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:11,493 INFO L93 Difference]: Finished difference Result 182 states and 465 transitions. [2021-04-15 02:20:11,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:20:11,493 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 15 [2021-04-15 02:20:11,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:11,494 INFO L225 Difference]: With dead ends: 182 [2021-04-15 02:20:11,494 INFO L226 Difference]: Without dead ends: 179 [2021-04-15 02:20:11,495 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:11,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-04-15 02:20:11,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 151. [2021-04-15 02:20:11,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.7066666666666666) internal successors, (406), 150 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:11,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 406 transitions. [2021-04-15 02:20:11,499 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 406 transitions. Word has length 15 [2021-04-15 02:20:11,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:11,499 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 406 transitions. [2021-04-15 02:20:11,499 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 02:20:11,499 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 406 transitions. [2021-04-15 02:20:11,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:20:11,499 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:11,499 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:11,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:11,723 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:11,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:11,724 INFO L82 PathProgramCache]: Analyzing trace with hash -708726510, now seen corresponding path program 30 times [2021-04-15 02:20:11,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:11,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010585502] [2021-04-15 02:20:11,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:11,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:11,766 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 02:20:11,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010585502] [2021-04-15 02:20:11,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102695968] [2021-04-15 02:20:11,767 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 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 02:20:11,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:20:11,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:11,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:20:11,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:11,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:11,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:11,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-04-15 02:20:11,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729713290] [2021-04-15 02:20:11,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:20:11,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:11,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:20:11,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:20:11,836 INFO L87 Difference]: Start difference. First operand 151 states and 406 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 02:20:11,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:11,894 INFO L93 Difference]: Finished difference Result 262 states and 620 transitions. [2021-04-15 02:20:11,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:20:11,894 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 15 [2021-04-15 02:20:11,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:11,895 INFO L225 Difference]: With dead ends: 262 [2021-04-15 02:20:11,895 INFO L226 Difference]: Without dead ends: 262 [2021-04-15 02:20:11,896 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:11,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-04-15 02:20:11,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 175. [2021-04-15 02:20:11,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.839080459770115) internal successors, (494), 174 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:11,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 494 transitions. [2021-04-15 02:20:11,900 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 494 transitions. Word has length 15 [2021-04-15 02:20:11,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:11,900 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 494 transitions. [2021-04-15 02:20:11,900 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 02:20:11,901 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 494 transitions. [2021-04-15 02:20:11,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:20:11,901 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:11,901 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:12,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-04-15 02:20:12,123 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:12,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:12,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1547625808, now seen corresponding path program 31 times [2021-04-15 02:20:12,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:12,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545293699] [2021-04-15 02:20:12,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:12,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:12,167 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 02:20:12,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545293699] [2021-04-15 02:20:12,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139520863] [2021-04-15 02:20:12,167 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 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 02:20:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:12,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:20:12,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:20:12,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:12,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2021-04-15 02:20:12,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778489768] [2021-04-15 02:20:12,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:20:12,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:12,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:20:12,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:20:12,236 INFO L87 Difference]: Start difference. First operand 175 states and 494 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 02:20:12,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:12,310 INFO L93 Difference]: Finished difference Result 242 states and 591 transitions. [2021-04-15 02:20:12,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:20:12,311 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 15 [2021-04-15 02:20:12,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:12,312 INFO L225 Difference]: With dead ends: 242 [2021-04-15 02:20:12,312 INFO L226 Difference]: Without dead ends: 240 [2021-04-15 02:20:12,312 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:12,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-04-15 02:20:12,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 175. [2021-04-15 02:20:12,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.8275862068965516) internal successors, (492), 174 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:12,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 492 transitions. [2021-04-15 02:20:12,320 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 492 transitions. Word has length 15 [2021-04-15 02:20:12,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:12,320 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 492 transitions. [2021-04-15 02:20:12,320 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 02:20:12,320 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 492 transitions. [2021-04-15 02:20:12,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:20:12,321 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:12,321 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:12,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-04-15 02:20:12,534 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:12,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:12,534 INFO L82 PathProgramCache]: Analyzing trace with hash -58220812, now seen corresponding path program 32 times [2021-04-15 02:20:12,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:12,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422024306] [2021-04-15 02:20:12,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:12,578 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 02:20:12,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422024306] [2021-04-15 02:20:12,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985539320] [2021-04-15 02:20:12,579 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 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 02:20:12,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:12,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:12,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:20:12,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:12,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:12,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-04-15 02:20:12,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946117404] [2021-04-15 02:20:12,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:20:12,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:12,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:20:12,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:20:12,641 INFO L87 Difference]: Start difference. First operand 175 states and 492 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 02:20:12,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:12,726 INFO L93 Difference]: Finished difference Result 247 states and 596 transitions. [2021-04-15 02:20:12,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:20:12,726 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 15 [2021-04-15 02:20:12,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:12,727 INFO L225 Difference]: With dead ends: 247 [2021-04-15 02:20:12,727 INFO L226 Difference]: Without dead ends: 244 [2021-04-15 02:20:12,728 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:20:12,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-04-15 02:20:12,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 179. [2021-04-15 02:20:12,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.842696629213483) internal successors, (506), 178 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:12,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 506 transitions. [2021-04-15 02:20:12,732 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 506 transitions. Word has length 15 [2021-04-15 02:20:12,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:12,733 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 506 transitions. [2021-04-15 02:20:12,733 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 02:20:12,733 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 506 transitions. [2021-04-15 02:20:12,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:20:12,733 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:12,733 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:12,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-04-15 02:20:12,945 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:12,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:12,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1131306192, now seen corresponding path program 33 times [2021-04-15 02:20:12,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:12,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074217516] [2021-04-15 02:20:12,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:12,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:12,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:12,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074217516] [2021-04-15 02:20:12,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186292261] [2021-04-15 02:20:12,998 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 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 02:20:13,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:20:13,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:13,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:20:13,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:13,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:13,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-04-15 02:20:13,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429093825] [2021-04-15 02:20:13,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:20:13,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:13,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:20:13,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:20:13,078 INFO L87 Difference]: Start difference. First operand 179 states and 506 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 02:20:13,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:13,162 INFO L93 Difference]: Finished difference Result 219 states and 577 transitions. [2021-04-15 02:20:13,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:20:13,163 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 15 [2021-04-15 02:20:13,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:13,164 INFO L225 Difference]: With dead ends: 219 [2021-04-15 02:20:13,164 INFO L226 Difference]: Without dead ends: 216 [2021-04-15 02:20:13,164 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:20:13,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-04-15 02:20:13,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 179. [2021-04-15 02:20:13,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.837078651685393) internal successors, (505), 178 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:13,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 505 transitions. [2021-04-15 02:20:13,169 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 505 transitions. Word has length 15 [2021-04-15 02:20:13,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:13,169 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 505 transitions. [2021-04-15 02:20:13,169 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 02:20:13,169 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 505 transitions. [2021-04-15 02:20:13,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:20:13,169 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:13,170 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:13,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-04-15 02:20:13,377 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:13,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:13,377 INFO L82 PathProgramCache]: Analyzing trace with hash -37214604, now seen corresponding path program 34 times [2021-04-15 02:20:13,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:13,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594916998] [2021-04-15 02:20:13,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:13,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594916998] [2021-04-15 02:20:13,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517047918] [2021-04-15 02:20:13,429 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 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 02:20:13,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:13,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:13,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:20:13,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:13,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:13,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-04-15 02:20:13,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356044633] [2021-04-15 02:20:13,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:20:13,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:13,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:20:13,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:13,503 INFO L87 Difference]: Start difference. First operand 179 states and 505 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 02:20:13,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:13,601 INFO L93 Difference]: Finished difference Result 212 states and 567 transitions. [2021-04-15 02:20:13,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:20:13,601 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 15 [2021-04-15 02:20:13,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:13,602 INFO L225 Difference]: With dead ends: 212 [2021-04-15 02:20:13,602 INFO L226 Difference]: Without dead ends: 208 [2021-04-15 02:20:13,602 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:13,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-04-15 02:20:13,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 179. [2021-04-15 02:20:13,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.831460674157303) internal successors, (504), 178 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:13,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 504 transitions. [2021-04-15 02:20:13,605 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 504 transitions. Word has length 15 [2021-04-15 02:20:13,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:13,605 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 504 transitions. [2021-04-15 02:20:13,605 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 02:20:13,605 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 504 transitions. [2021-04-15 02:20:13,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:20:13,606 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:13,606 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:13,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-04-15 02:20:13,828 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:13,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1066138199, now seen corresponding path program 35 times [2021-04-15 02:20:13,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:13,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289735193] [2021-04-15 02:20:13,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:13,935 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:20:13,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289735193] [2021-04-15 02:20:13,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461738754] [2021-04-15 02:20:13,936 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:20:13,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:20:13,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:13,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:20:13,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:20:14,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:14,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 02:20:14,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871333135] [2021-04-15 02:20:14,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:14,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:14,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:14,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:14,039 INFO L87 Difference]: Start difference. First operand 179 states and 504 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 02:20:14,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:14,145 INFO L93 Difference]: Finished difference Result 452 states and 1210 transitions. [2021-04-15 02:20:14,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:20:14,145 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 16 [2021-04-15 02:20:14,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:14,147 INFO L225 Difference]: With dead ends: 452 [2021-04-15 02:20:14,147 INFO L226 Difference]: Without dead ends: 448 [2021-04-15 02:20:14,147 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 143.9ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:14,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-04-15 02:20:14,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 236. [2021-04-15 02:20:14,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.748936170212766) internal successors, (646), 235 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:14,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 646 transitions. [2021-04-15 02:20:14,155 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 646 transitions. Word has length 16 [2021-04-15 02:20:14,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:14,155 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 646 transitions. [2021-04-15 02:20:14,155 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 02:20:14,155 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 646 transitions. [2021-04-15 02:20:14,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:20:14,156 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:14,156 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:14,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-04-15 02:20:14,369 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:14,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:14,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2129828983, now seen corresponding path program 36 times [2021-04-15 02:20:14,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:14,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874537146] [2021-04-15 02:20:14,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:14,410 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:14,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874537146] [2021-04-15 02:20:14,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503345542] [2021-04-15 02:20:14,410 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 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 02:20:14,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:20:14,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:14,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 02:20:14,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:14,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:14,626 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 02:20:14,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:20:14,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:14,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:20:14,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:20:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:14,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:14,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-04-15 02:20:14,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369889393] [2021-04-15 02:20:14,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:20:14,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:14,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:20:14,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:14,838 INFO L87 Difference]: Start difference. First operand 236 states and 646 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:20:14,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:14,943 INFO L93 Difference]: Finished difference Result 318 states and 823 transitions. [2021-04-15 02:20:14,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:20:14,943 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:20:14,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:14,945 INFO L225 Difference]: With dead ends: 318 [2021-04-15 02:20:14,945 INFO L226 Difference]: Without dead ends: 315 [2021-04-15 02:20:14,945 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:14,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-04-15 02:20:14,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 284. [2021-04-15 02:20:14,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.7420494699646643) internal successors, (776), 283 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:14,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 776 transitions. [2021-04-15 02:20:14,951 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 776 transitions. Word has length 17 [2021-04-15 02:20:14,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:14,951 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 776 transitions. [2021-04-15 02:20:14,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:20:14,951 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 776 transitions. [2021-04-15 02:20:14,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:20:14,952 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:14,952 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:15,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-04-15 02:20:15,165 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:15,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:15,165 INFO L82 PathProgramCache]: Analyzing trace with hash 368526055, now seen corresponding path program 37 times [2021-04-15 02:20:15,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:15,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031949277] [2021-04-15 02:20:15,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:15,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031949277] [2021-04-15 02:20:15,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062932972] [2021-04-15 02:20:15,212 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 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 02:20:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:15,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 02:20:15,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:15,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:15,399 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 02:20:15,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:20:15,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:15,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:20:15,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:20:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:15,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:15,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-04-15 02:20:15,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263744448] [2021-04-15 02:20:15,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:20:15,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:15,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:20:15,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:15,517 INFO L87 Difference]: Start difference. First operand 284 states and 776 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 02:20:15,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:15,662 INFO L93 Difference]: Finished difference Result 363 states and 957 transitions. [2021-04-15 02:20:15,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:20:15,663 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 02:20:15,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:15,664 INFO L225 Difference]: With dead ends: 363 [2021-04-15 02:20:15,664 INFO L226 Difference]: Without dead ends: 359 [2021-04-15 02:20:15,664 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:15,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-04-15 02:20:15,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 326. [2021-04-15 02:20:15,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.766153846153846) internal successors, (899), 325 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 02:20:15,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 899 transitions. [2021-04-15 02:20:15,671 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 899 transitions. Word has length 17 [2021-04-15 02:20:15,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:15,672 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 899 transitions. [2021-04-15 02:20:15,672 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 02:20:15,672 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 899 transitions. [2021-04-15 02:20:15,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:20:15,673 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:15,673 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:15,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:15,889 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:15,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:15,889 INFO L82 PathProgramCache]: Analyzing trace with hash 527358741, now seen corresponding path program 38 times [2021-04-15 02:20:15,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:15,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884765363] [2021-04-15 02:20:15,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:15,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884765363] [2021-04-15 02:20:15,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918717961] [2021-04-15 02:20:15,951 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 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 02:20:15,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:15,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:15,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 02:20:15,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:16,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:16,180 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 02:20:16,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:20:16,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:16,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:20:16,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:20:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:16,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:16,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-04-15 02:20:16,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681126271] [2021-04-15 02:20:16,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:20:16,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:16,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:20:16,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:16,392 INFO L87 Difference]: Start difference. First operand 326 states and 899 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 02:20:16,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:16,513 INFO L93 Difference]: Finished difference Result 412 states and 1100 transitions. [2021-04-15 02:20:16,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:20:16,513 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 02:20:16,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:16,515 INFO L225 Difference]: With dead ends: 412 [2021-04-15 02:20:16,515 INFO L226 Difference]: Without dead ends: 408 [2021-04-15 02:20:16,515 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:16,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-04-15 02:20:16,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 370. [2021-04-15 02:20:16,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.8048780487804876) internal successors, (1035), 369 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:16,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1035 transitions. [2021-04-15 02:20:16,524 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1035 transitions. Word has length 17 [2021-04-15 02:20:16,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:16,524 INFO L480 AbstractCegarLoop]: Abstraction has 370 states and 1035 transitions. [2021-04-15 02:20:16,524 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 02:20:16,524 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1035 transitions. [2021-04-15 02:20:16,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:20:16,525 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:16,525 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:16,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-04-15 02:20:16,746 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:16,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:16,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1156204711, now seen corresponding path program 39 times [2021-04-15 02:20:16,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:16,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111013487] [2021-04-15 02:20:16,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:20:16,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111013487] [2021-04-15 02:20:16,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544948500] [2021-04-15 02:20:16,786 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 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 02:20:16,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:20:16,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:16,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 02:20:16,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:16,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:16,962 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 02:20:17,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:20:17,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:17,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:20:17,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:20:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:17,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:17,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-04-15 02:20:17,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034923098] [2021-04-15 02:20:17,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:20:17,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:17,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:20:17,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:17,129 INFO L87 Difference]: Start difference. First operand 370 states and 1035 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 02:20:17,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:17,261 INFO L93 Difference]: Finished difference Result 474 states and 1277 transitions. [2021-04-15 02:20:17,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:20:17,262 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 02:20:17,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:17,264 INFO L225 Difference]: With dead ends: 474 [2021-04-15 02:20:17,264 INFO L226 Difference]: Without dead ends: 470 [2021-04-15 02:20:17,264 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:17,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-04-15 02:20:17,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 421. [2021-04-15 02:20:17,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.85) internal successors, (1197), 420 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:17,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1197 transitions. [2021-04-15 02:20:17,273 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1197 transitions. Word has length 17 [2021-04-15 02:20:17,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:17,275 INFO L480 AbstractCegarLoop]: Abstraction has 421 states and 1197 transitions. [2021-04-15 02:20:17,275 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 02:20:17,275 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1197 transitions. [2021-04-15 02:20:17,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:20:17,276 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:17,276 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:17,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:17,497 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:17,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:17,498 INFO L82 PathProgramCache]: Analyzing trace with hash -824406699, now seen corresponding path program 40 times [2021-04-15 02:20:17,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:17,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752815930] [2021-04-15 02:20:17,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:17,547 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:17,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752815930] [2021-04-15 02:20:17,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731193217] [2021-04-15 02:20:17,547 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 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 02:20:17,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:17,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:17,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 02:20:17,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:17,780 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:17,781 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 02:20:17,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:20:17,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:17,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:20:17,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:20:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:17,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:17,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-04-15 02:20:17,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868140601] [2021-04-15 02:20:17,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:20:17,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:17,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:20:17,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:17,919 INFO L87 Difference]: Start difference. First operand 421 states and 1197 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 02:20:18,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:18,085 INFO L93 Difference]: Finished difference Result 501 states and 1382 transitions. [2021-04-15 02:20:18,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:20:18,086 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 02:20:18,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:18,088 INFO L225 Difference]: With dead ends: 501 [2021-04-15 02:20:18,088 INFO L226 Difference]: Without dead ends: 498 [2021-04-15 02:20:18,088 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 133.6ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:18,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-04-15 02:20:18,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 462. [2021-04-15 02:20:18,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.8720173535791758) internal successors, (1324), 461 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:18,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1324 transitions. [2021-04-15 02:20:18,111 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1324 transitions. Word has length 17 [2021-04-15 02:20:18,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:18,111 INFO L480 AbstractCegarLoop]: Abstraction has 462 states and 1324 transitions. [2021-04-15 02:20:18,111 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 02:20:18,111 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1324 transitions. [2021-04-15 02:20:18,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:20:18,112 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:18,112 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:18,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:18,333 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:18,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:18,333 INFO L82 PathProgramCache]: Analyzing trace with hash -2093818265, now seen corresponding path program 41 times [2021-04-15 02:20:18,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:18,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703824696] [2021-04-15 02:20:18,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:18,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703824696] [2021-04-15 02:20:18,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358887723] [2021-04-15 02:20:18,373 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 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 02:20:18,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:20:18,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:18,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 02:20:18,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:18,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:18,563 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 02:20:18,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:20:18,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:18,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:20:18,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:20:18,760 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:18,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:18,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-04-15 02:20:18,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728676132] [2021-04-15 02:20:18,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:20:18,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:18,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:20:18,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:18,761 INFO L87 Difference]: Start difference. First operand 462 states and 1324 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 02:20:18,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:18,902 INFO L93 Difference]: Finished difference Result 537 states and 1487 transitions. [2021-04-15 02:20:18,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:20:18,903 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 02:20:18,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:18,905 INFO L225 Difference]: With dead ends: 537 [2021-04-15 02:20:18,905 INFO L226 Difference]: Without dead ends: 534 [2021-04-15 02:20:18,905 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:18,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-04-15 02:20:18,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 497. [2021-04-15 02:20:18,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.8891129032258065) internal successors, (1433), 496 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:18,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1433 transitions. [2021-04-15 02:20:18,916 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1433 transitions. Word has length 17 [2021-04-15 02:20:18,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:18,916 INFO L480 AbstractCegarLoop]: Abstraction has 497 states and 1433 transitions. [2021-04-15 02:20:18,916 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 02:20:18,916 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1433 transitions. [2021-04-15 02:20:18,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:20:18,918 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:18,918 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:19,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-04-15 02:20:19,141 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:19,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:19,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1504096149, now seen corresponding path program 42 times [2021-04-15 02:20:19,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:19,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314801462] [2021-04-15 02:20:19,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:19,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314801462] [2021-04-15 02:20:19,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740940743] [2021-04-15 02:20:19,194 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:20:19,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:20:19,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:19,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 02:20:19,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:19,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:19,402 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 02:20:19,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:20:19,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:20:19,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:20:19,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:20:19,561 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:19,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:19,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-04-15 02:20:19,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241785886] [2021-04-15 02:20:19,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:20:19,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:19,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:20:19,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:19,563 INFO L87 Difference]: Start difference. First operand 497 states and 1433 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 02:20:19,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:19,704 INFO L93 Difference]: Finished difference Result 574 states and 1592 transitions. [2021-04-15 02:20:19,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:20:19,704 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 02:20:19,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:19,707 INFO L225 Difference]: With dead ends: 574 [2021-04-15 02:20:19,707 INFO L226 Difference]: Without dead ends: 571 [2021-04-15 02:20:19,707 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:19,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-04-15 02:20:19,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 529. [2021-04-15 02:20:19,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 2.9015151515151514) internal successors, (1532), 528 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1532 transitions. [2021-04-15 02:20:19,718 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1532 transitions. Word has length 17 [2021-04-15 02:20:19,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:19,718 INFO L480 AbstractCegarLoop]: Abstraction has 529 states and 1532 transitions. [2021-04-15 02:20:19,719 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 02:20:19,719 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1532 transitions. [2021-04-15 02:20:19,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:19,720 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:19,720 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:19,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:19,933 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:19,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:19,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1577117358, now seen corresponding path program 43 times [2021-04-15 02:20:19,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:19,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105699530] [2021-04-15 02:20:19,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:19,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105699530] [2021-04-15 02:20:19,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306072295] [2021-04-15 02:20:19,992 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 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 02:20:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:20,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:20,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:20,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:20,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:20:20,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786345071] [2021-04-15 02:20:20,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:20,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:20,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:20,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:20,057 INFO L87 Difference]: Start difference. First operand 529 states and 1532 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 02:20:20,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:20,245 INFO L93 Difference]: Finished difference Result 696 states and 1799 transitions. [2021-04-15 02:20:20,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:20:20,245 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 18 [2021-04-15 02:20:20,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:20,247 INFO L225 Difference]: With dead ends: 696 [2021-04-15 02:20:20,247 INFO L226 Difference]: Without dead ends: 689 [2021-04-15 02:20:20,247 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 151.4ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:20:20,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-04-15 02:20:20,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 549. [2021-04-15 02:20:20,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.906934306569343) internal successors, (1593), 548 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:20,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1593 transitions. [2021-04-15 02:20:20,260 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1593 transitions. Word has length 18 [2021-04-15 02:20:20,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:20,260 INFO L480 AbstractCegarLoop]: Abstraction has 549 states and 1593 transitions. [2021-04-15 02:20:20,260 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 02:20:20,260 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1593 transitions. [2021-04-15 02:20:20,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:20,261 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:20,262 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:20,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-04-15 02:20:20,477 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:20,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:20,477 INFO L82 PathProgramCache]: Analyzing trace with hash 121393866, now seen corresponding path program 44 times [2021-04-15 02:20:20,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:20,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055473460] [2021-04-15 02:20:20,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:20,530 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:20,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055473460] [2021-04-15 02:20:20,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093025301] [2021-04-15 02:20:20,530 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 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 02:20:20,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:20,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:20,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:20,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:20,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:20,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:20:20,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842134203] [2021-04-15 02:20:20,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:20:20,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:20,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:20:20,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:20:20,591 INFO L87 Difference]: Start difference. First operand 549 states and 1593 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 02:20:20,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:20,641 INFO L93 Difference]: Finished difference Result 706 states and 1828 transitions. [2021-04-15 02:20:20,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:20:20,641 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 02:20:20,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:20,644 INFO L225 Difference]: With dead ends: 706 [2021-04-15 02:20:20,644 INFO L226 Difference]: Without dead ends: 706 [2021-04-15 02:20:20,645 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:20,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-04-15 02:20:20,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 525. [2021-04-15 02:20:20,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.8874045801526718) internal successors, (1513), 524 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:20,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1513 transitions. [2021-04-15 02:20:20,657 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1513 transitions. Word has length 18 [2021-04-15 02:20:20,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:20,658 INFO L480 AbstractCegarLoop]: Abstraction has 525 states and 1513 transitions. [2021-04-15 02:20:20,658 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 02:20:20,658 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1513 transitions. [2021-04-15 02:20:20,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:20,659 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:20,659 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:20,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-04-15 02:20:20,875 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:20,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:20,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1437522508, now seen corresponding path program 45 times [2021-04-15 02:20:20,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:20,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442069819] [2021-04-15 02:20:20,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:20,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442069819] [2021-04-15 02:20:20,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957071952] [2021-04-15 02:20:20,927 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 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 02:20:20,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:20:20,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:20,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:20,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:21,004 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:21,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:21,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:20:21,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557548022] [2021-04-15 02:20:21,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:20:21,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:21,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:20:21,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:20:21,005 INFO L87 Difference]: Start difference. First operand 525 states and 1513 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 02:20:21,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:21,122 INFO L93 Difference]: Finished difference Result 683 states and 1762 transitions. [2021-04-15 02:20:21,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:20:21,123 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 02:20:21,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:21,125 INFO L225 Difference]: With dead ends: 683 [2021-04-15 02:20:21,125 INFO L226 Difference]: Without dead ends: 681 [2021-04-15 02:20:21,126 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:20:21,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-04-15 02:20:21,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 547. [2021-04-15 02:20:21,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.8956043956043955) internal successors, (1581), 546 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:21,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1581 transitions. [2021-04-15 02:20:21,138 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1581 transitions. Word has length 18 [2021-04-15 02:20:21,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:21,139 INFO L480 AbstractCegarLoop]: Abstraction has 547 states and 1581 transitions. [2021-04-15 02:20:21,139 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 02:20:21,139 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1581 transitions. [2021-04-15 02:20:21,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:21,140 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:21,140 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:21,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-04-15 02:20:21,353 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:21,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:21,353 INFO L82 PathProgramCache]: Analyzing trace with hash 280226552, now seen corresponding path program 46 times [2021-04-15 02:20:21,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:21,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42729730] [2021-04-15 02:20:21,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:21,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42729730] [2021-04-15 02:20:21,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347506348] [2021-04-15 02:20:21,407 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 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 02:20:21,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:21,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:21,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:21,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:21,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:21,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:20:21,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796139919] [2021-04-15 02:20:21,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:20:21,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:21,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:20:21,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:20:21,474 INFO L87 Difference]: Start difference. First operand 547 states and 1581 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 02:20:21,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:21,531 INFO L93 Difference]: Finished difference Result 721 states and 1842 transitions. [2021-04-15 02:20:21,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:20:21,531 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 02:20:21,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:21,534 INFO L225 Difference]: With dead ends: 721 [2021-04-15 02:20:21,534 INFO L226 Difference]: Without dead ends: 721 [2021-04-15 02:20:21,534 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:21,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-04-15 02:20:21,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 548. [2021-04-15 02:20:21,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 2.895795246800731) internal successors, (1584), 547 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:21,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1584 transitions. [2021-04-15 02:20:21,549 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1584 transitions. Word has length 18 [2021-04-15 02:20:21,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:21,549 INFO L480 AbstractCegarLoop]: Abstraction has 548 states and 1584 transitions. [2021-04-15 02:20:21,549 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 02:20:21,549 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1584 transitions. [2021-04-15 02:20:21,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:21,551 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:21,551 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:21,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:21,774 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:21,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:21,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1448820782, now seen corresponding path program 47 times [2021-04-15 02:20:21,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:21,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51886377] [2021-04-15 02:20:21,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:21,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:21,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51886377] [2021-04-15 02:20:21,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125276952] [2021-04-15 02:20:21,830 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:21,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:20:21,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:21,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:21,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:21,903 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:21,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:21,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:20:21,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867428186] [2021-04-15 02:20:21,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:20:21,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:21,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:20:21,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:21,905 INFO L87 Difference]: Start difference. First operand 548 states and 1584 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 02:20:21,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:21,987 INFO L93 Difference]: Finished difference Result 777 states and 1974 transitions. [2021-04-15 02:20:21,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:20:21,988 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 02:20:21,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:21,991 INFO L225 Difference]: With dead ends: 777 [2021-04-15 02:20:21,991 INFO L226 Difference]: Without dead ends: 777 [2021-04-15 02:20:21,992 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:21,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-04-15 02:20:22,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 523. [2021-04-15 02:20:22,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.875478927203065) internal successors, (1501), 522 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:22,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1501 transitions. [2021-04-15 02:20:22,006 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1501 transitions. Word has length 18 [2021-04-15 02:20:22,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:22,006 INFO L480 AbstractCegarLoop]: Abstraction has 523 states and 1501 transitions. [2021-04-15 02:20:22,006 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 02:20:22,007 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1501 transitions. [2021-04-15 02:20:22,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:22,008 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:22,008 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:22,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:22,222 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:22,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:22,223 INFO L82 PathProgramCache]: Analyzing trace with hash -808676538, now seen corresponding path program 48 times [2021-04-15 02:20:22,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:22,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85773458] [2021-04-15 02:20:22,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:22,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85773458] [2021-04-15 02:20:22,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337290458] [2021-04-15 02:20:22,279 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 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 02:20:22,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:20:22,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:22,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:22,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:22,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:22,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:20:22,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647930087] [2021-04-15 02:20:22,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:20:22,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:22,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:20:22,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:20:22,345 INFO L87 Difference]: Start difference. First operand 523 states and 1501 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 02:20:22,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:22,473 INFO L93 Difference]: Finished difference Result 678 states and 1749 transitions. [2021-04-15 02:20:22,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:20:22,474 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 02:20:22,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:22,476 INFO L225 Difference]: With dead ends: 678 [2021-04-15 02:20:22,476 INFO L226 Difference]: Without dead ends: 676 [2021-04-15 02:20:22,477 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:20:22,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-04-15 02:20:22,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 547. [2021-04-15 02:20:22,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.880952380952381) internal successors, (1573), 546 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:22,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1573 transitions. [2021-04-15 02:20:22,489 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1573 transitions. Word has length 18 [2021-04-15 02:20:22,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:22,490 INFO L480 AbstractCegarLoop]: Abstraction has 547 states and 1573 transitions. [2021-04-15 02:20:22,490 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 02:20:22,490 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1573 transitions. [2021-04-15 02:20:22,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:22,491 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:22,491 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:22,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:22,714 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:22,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:22,714 INFO L82 PathProgramCache]: Analyzing trace with hash 909072522, now seen corresponding path program 49 times [2021-04-15 02:20:22,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:22,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825436525] [2021-04-15 02:20:22,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:22,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825436525] [2021-04-15 02:20:22,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067178331] [2021-04-15 02:20:22,762 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 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 02:20:22,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:22,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:22,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:22,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:22,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:20:22,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758454460] [2021-04-15 02:20:22,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:20:22,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:22,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:20:22,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:20:22,833 INFO L87 Difference]: Start difference. First operand 547 states and 1573 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 02:20:22,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:22,894 INFO L93 Difference]: Finished difference Result 708 states and 1807 transitions. [2021-04-15 02:20:22,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:20:22,895 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 02:20:22,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:22,898 INFO L225 Difference]: With dead ends: 708 [2021-04-15 02:20:22,898 INFO L226 Difference]: Without dead ends: 708 [2021-04-15 02:20:22,898 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:22,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-04-15 02:20:22,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 547. [2021-04-15 02:20:22,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.880952380952381) internal successors, (1573), 546 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:22,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1573 transitions. [2021-04-15 02:20:22,916 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1573 transitions. Word has length 18 [2021-04-15 02:20:22,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:22,916 INFO L480 AbstractCegarLoop]: Abstraction has 547 states and 1573 transitions. [2021-04-15 02:20:22,916 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 02:20:22,916 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1573 transitions. [2021-04-15 02:20:22,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:22,918 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:22,918 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:23,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:23,140 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:23,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:23,140 INFO L82 PathProgramCache]: Analyzing trace with hash -819974812, now seen corresponding path program 50 times [2021-04-15 02:20:23,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:23,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440009877] [2021-04-15 02:20:23,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:23,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440009877] [2021-04-15 02:20:23,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711372500] [2021-04-15 02:20:23,198 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 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 02:20:23,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:23,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:23,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:23,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:23,272 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:23,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:23,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:20:23,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480565963] [2021-04-15 02:20:23,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:20:23,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:23,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:20:23,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:23,273 INFO L87 Difference]: Start difference. First operand 547 states and 1573 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 02:20:23,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:23,356 INFO L93 Difference]: Finished difference Result 767 states and 1938 transitions. [2021-04-15 02:20:23,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:20:23,356 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 02:20:23,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:23,359 INFO L225 Difference]: With dead ends: 767 [2021-04-15 02:20:23,360 INFO L226 Difference]: Without dead ends: 767 [2021-04-15 02:20:23,360 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:23,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-04-15 02:20:23,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 520. [2021-04-15 02:20:23,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 2.859344894026975) internal successors, (1484), 519 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:23,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1484 transitions. [2021-04-15 02:20:23,371 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1484 transitions. Word has length 18 [2021-04-15 02:20:23,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:23,371 INFO L480 AbstractCegarLoop]: Abstraction has 520 states and 1484 transitions. [2021-04-15 02:20:23,371 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 02:20:23,371 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1484 transitions. [2021-04-15 02:20:23,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:23,372 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:23,372 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:23,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-04-15 02:20:23,593 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:23,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:23,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1414132682, now seen corresponding path program 51 times [2021-04-15 02:20:23,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:23,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520045854] [2021-04-15 02:20:23,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:23,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520045854] [2021-04-15 02:20:23,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139766526] [2021-04-15 02:20:23,641 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 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 02:20:23,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:20:23,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:23,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:23,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:23,703 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:23,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:23,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:20:23,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226105562] [2021-04-15 02:20:23,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:20:23,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:23,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:20:23,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:23,704 INFO L87 Difference]: Start difference. First operand 520 states and 1484 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 02:20:23,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:23,811 INFO L93 Difference]: Finished difference Result 976 states and 2581 transitions. [2021-04-15 02:20:23,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:20:23,811 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 02:20:23,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:23,814 INFO L225 Difference]: With dead ends: 976 [2021-04-15 02:20:23,814 INFO L226 Difference]: Without dead ends: 976 [2021-04-15 02:20:23,814 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:20:23,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-04-15 02:20:23,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 701. [2021-04-15 02:20:23,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 2.9371428571428573) internal successors, (2056), 700 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:23,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 2056 transitions. [2021-04-15 02:20:23,828 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 2056 transitions. Word has length 18 [2021-04-15 02:20:23,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:23,828 INFO L480 AbstractCegarLoop]: Abstraction has 701 states and 2056 transitions. [2021-04-15 02:20:23,828 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 02:20:23,828 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 2056 transitions. [2021-04-15 02:20:23,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:23,830 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:23,830 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:24,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-04-15 02:20:24,052 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:24,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:24,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1505679348, now seen corresponding path program 52 times [2021-04-15 02:20:24,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:24,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764050338] [2021-04-15 02:20:24,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:24,101 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:24,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764050338] [2021-04-15 02:20:24,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671015191] [2021-04-15 02:20:24,102 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 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 02:20:24,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:24,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:24,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:24,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:24,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:24,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:20:24,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394588453] [2021-04-15 02:20:24,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:20:24,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:24,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:20:24,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:20:24,162 INFO L87 Difference]: Start difference. First operand 701 states and 2056 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 02:20:24,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:24,259 INFO L93 Difference]: Finished difference Result 888 states and 2419 transitions. [2021-04-15 02:20:24,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:20:24,260 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 02:20:24,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:24,267 INFO L225 Difference]: With dead ends: 888 [2021-04-15 02:20:24,267 INFO L226 Difference]: Without dead ends: 886 [2021-04-15 02:20:24,267 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:20:24,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-04-15 02:20:24,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 764. [2021-04-15 02:20:24,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 2.9436435124508518) internal successors, (2246), 763 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:24,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2246 transitions. [2021-04-15 02:20:24,282 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2246 transitions. Word has length 18 [2021-04-15 02:20:24,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:24,282 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2246 transitions. [2021-04-15 02:20:24,283 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 02:20:24,283 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2246 transitions. [2021-04-15 02:20:24,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:24,284 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:24,284 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:24,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-04-15 02:20:24,506 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:24,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:24,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1071538888, now seen corresponding path program 53 times [2021-04-15 02:20:24,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:24,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810032891] [2021-04-15 02:20:24,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:24,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810032891] [2021-04-15 02:20:24,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156376752] [2021-04-15 02:20:24,553 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 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 02:20:24,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:20:24,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:24,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:24,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:24,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:24,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:20:24,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701594544] [2021-04-15 02:20:24,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:20:24,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:24,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:20:24,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:20:24,616 INFO L87 Difference]: Start difference. First operand 764 states and 2246 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 02:20:24,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:24,666 INFO L93 Difference]: Finished difference Result 882 states and 2384 transitions. [2021-04-15 02:20:24,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:20:24,666 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 02:20:24,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:24,681 INFO L225 Difference]: With dead ends: 882 [2021-04-15 02:20:24,681 INFO L226 Difference]: Without dead ends: 882 [2021-04-15 02:20:24,681 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:24,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-04-15 02:20:24,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 755. [2021-04-15 02:20:24,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 2.9323607427055705) internal successors, (2211), 754 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:24,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2211 transitions. [2021-04-15 02:20:24,708 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2211 transitions. Word has length 18 [2021-04-15 02:20:24,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:24,708 INFO L480 AbstractCegarLoop]: Abstraction has 755 states and 2211 transitions. [2021-04-15 02:20:24,708 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 02:20:24,709 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2211 transitions. [2021-04-15 02:20:24,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:24,710 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:24,710 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:24,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-04-15 02:20:24,925 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:24,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:24,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1494381074, now seen corresponding path program 54 times [2021-04-15 02:20:24,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:24,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157860715] [2021-04-15 02:20:24,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:24,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157860715] [2021-04-15 02:20:24,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769103677] [2021-04-15 02:20:24,982 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 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 02:20:25,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:20:25,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:25,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:25,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:25,061 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:25,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:25,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:20:25,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521662272] [2021-04-15 02:20:25,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:20:25,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:25,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:20:25,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:25,062 INFO L87 Difference]: Start difference. First operand 755 states and 2211 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 02:20:25,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:25,129 INFO L93 Difference]: Finished difference Result 936 states and 2510 transitions. [2021-04-15 02:20:25,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:20:25,130 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 02:20:25,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:25,133 INFO L225 Difference]: With dead ends: 936 [2021-04-15 02:20:25,133 INFO L226 Difference]: Without dead ends: 936 [2021-04-15 02:20:25,133 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:25,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-04-15 02:20:25,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 710. [2021-04-15 02:20:25,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 2.913963328631876) internal successors, (2066), 709 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:25,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2066 transitions. [2021-04-15 02:20:25,149 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2066 transitions. Word has length 18 [2021-04-15 02:20:25,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:25,149 INFO L480 AbstractCegarLoop]: Abstraction has 710 states and 2066 transitions. [2021-04-15 02:20:25,149 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 02:20:25,149 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2066 transitions. [2021-04-15 02:20:25,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:25,151 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:25,151 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:25,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:25,374 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:25,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:25,375 INFO L82 PathProgramCache]: Analyzing trace with hash -566478728, now seen corresponding path program 55 times [2021-04-15 02:20:25,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:25,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596902080] [2021-04-15 02:20:25,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:25,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596902080] [2021-04-15 02:20:25,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957059066] [2021-04-15 02:20:25,438 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:20:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:25,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:25,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:25,506 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:25,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:25,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:20:25,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873915397] [2021-04-15 02:20:25,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:20:25,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:25,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:20:25,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:25,508 INFO L87 Difference]: Start difference. First operand 710 states and 2066 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 02:20:25,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:25,601 INFO L93 Difference]: Finished difference Result 1110 states and 3081 transitions. [2021-04-15 02:20:25,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:20:25,602 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 02:20:25,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:25,604 INFO L225 Difference]: With dead ends: 1110 [2021-04-15 02:20:25,604 INFO L226 Difference]: Without dead ends: 1110 [2021-04-15 02:20:25,604 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:20:25,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-04-15 02:20:25,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 950. [2021-04-15 02:20:25,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 2.9736564805057957) internal successors, (2822), 949 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:25,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 2822 transitions. [2021-04-15 02:20:25,624 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 2822 transitions. Word has length 18 [2021-04-15 02:20:25,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:25,624 INFO L480 AbstractCegarLoop]: Abstraction has 950 states and 2822 transitions. [2021-04-15 02:20:25,624 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 02:20:25,624 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 2822 transitions. [2021-04-15 02:20:25,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:25,626 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:25,626 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:25,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-04-15 02:20:25,848 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:25,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:25,848 INFO L82 PathProgramCache]: Analyzing trace with hash -28623150, now seen corresponding path program 56 times [2021-04-15 02:20:25,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:25,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080301937] [2021-04-15 02:20:25,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:25,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080301937] [2021-04-15 02:20:25,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267603996] [2021-04-15 02:20:25,911 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:20:25,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:25,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:25,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:25,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:25,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:25,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:20:25,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158611916] [2021-04-15 02:20:25,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:20:25,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:25,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:20:25,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:25,991 INFO L87 Difference]: Start difference. First operand 950 states and 2822 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 02:20:26,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:26,145 INFO L93 Difference]: Finished difference Result 1384 states and 3920 transitions. [2021-04-15 02:20:26,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:20:26,145 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 02:20:26,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:26,148 INFO L225 Difference]: With dead ends: 1384 [2021-04-15 02:20:26,149 INFO L226 Difference]: Without dead ends: 1384 [2021-04-15 02:20:26,149 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 124.1ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:20:26,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-04-15 02:20:26,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1190. [2021-04-15 02:20:26,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 3.015138772077376) internal successors, (3585), 1189 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:26,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3585 transitions. [2021-04-15 02:20:26,174 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3585 transitions. Word has length 18 [2021-04-15 02:20:26,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:26,174 INFO L480 AbstractCegarLoop]: Abstraction has 1190 states and 3585 transitions. [2021-04-15 02:20:26,174 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 02:20:26,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3585 transitions. [2021-04-15 02:20:26,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:26,176 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:26,176 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:26,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable436,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:26,399 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:26,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:26,399 INFO L82 PathProgramCache]: Analyzing trace with hash -928129974, now seen corresponding path program 57 times [2021-04-15 02:20:26,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:26,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842436688] [2021-04-15 02:20:26,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:26,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842436688] [2021-04-15 02:20:26,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631926015] [2021-04-15 02:20:26,445 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 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 02:20:26,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:20:26,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:26,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:26,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:20:26,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:26,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:20:26,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833949371] [2021-04-15 02:20:26,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:20:26,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:26,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:20:26,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:20:26,505 INFO L87 Difference]: Start difference. First operand 1190 states and 3585 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 02:20:26,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:26,629 INFO L93 Difference]: Finished difference Result 1540 states and 4536 transitions. [2021-04-15 02:20:26,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:20:26,630 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 18 [2021-04-15 02:20:26,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:26,633 INFO L225 Difference]: With dead ends: 1540 [2021-04-15 02:20:26,633 INFO L226 Difference]: Without dead ends: 1536 [2021-04-15 02:20:26,633 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:20:26,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-04-15 02:20:26,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1457. [2021-04-15 02:20:26,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1456 states have (on average 3.0494505494505493) internal successors, (4440), 1456 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:26,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 4440 transitions. [2021-04-15 02:20:26,670 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 4440 transitions. Word has length 18 [2021-04-15 02:20:26,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:26,670 INFO L480 AbstractCegarLoop]: Abstraction has 1457 states and 4440 transitions. [2021-04-15 02:20:26,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 02:20:26,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 4440 transitions. [2021-04-15 02:20:26,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:26,672 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:26,673 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:26,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-04-15 02:20:26,887 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:26,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:26,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1482288330, now seen corresponding path program 58 times [2021-04-15 02:20:26,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:26,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131843426] [2021-04-15 02:20:26,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:26,931 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:26,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131843426] [2021-04-15 02:20:26,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661094414] [2021-04-15 02:20:26,932 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 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 02:20:26,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:26,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:26,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:26,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:26,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:26,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:20:26,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963607522] [2021-04-15 02:20:26,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:20:26,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:27,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:20:27,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:20:27,000 INFO L87 Difference]: Start difference. First operand 1457 states and 4440 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 02:20:27,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:27,101 INFO L93 Difference]: Finished difference Result 1886 states and 5530 transitions. [2021-04-15 02:20:27,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:20:27,101 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 18 [2021-04-15 02:20:27,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:27,106 INFO L225 Difference]: With dead ends: 1886 [2021-04-15 02:20:27,106 INFO L226 Difference]: Without dead ends: 1886 [2021-04-15 02:20:27,106 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:27,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2021-04-15 02:20:27,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1647. [2021-04-15 02:20:27,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.0674362089914946) internal successors, (5049), 1646 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:27,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5049 transitions. [2021-04-15 02:20:27,137 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5049 transitions. Word has length 18 [2021-04-15 02:20:27,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:27,137 INFO L480 AbstractCegarLoop]: Abstraction has 1647 states and 5049 transitions. [2021-04-15 02:20:27,137 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 02:20:27,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5049 transitions. [2021-04-15 02:20:27,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:27,139 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:27,139 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:27,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:27,362 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:27,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:27,362 INFO L82 PathProgramCache]: Analyzing trace with hash 975942064, now seen corresponding path program 59 times [2021-04-15 02:20:27,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:27,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775379095] [2021-04-15 02:20:27,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:27,416 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:27,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775379095] [2021-04-15 02:20:27,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450613652] [2021-04-15 02:20:27,417 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:20:27,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:20:27,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:27,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:27,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:27,477 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:27,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:27,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:20:27,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140691410] [2021-04-15 02:20:27,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:20:27,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:27,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:20:27,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:27,478 INFO L87 Difference]: Start difference. First operand 1647 states and 5049 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 02:20:27,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:27,583 INFO L93 Difference]: Finished difference Result 2131 states and 6281 transitions. [2021-04-15 02:20:27,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:20:27,583 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 02:20:27,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:27,587 INFO L225 Difference]: With dead ends: 2131 [2021-04-15 02:20:27,587 INFO L226 Difference]: Without dead ends: 2131 [2021-04-15 02:20:27,587 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:20:27,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-04-15 02:20:27,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1134. [2021-04-15 02:20:27,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 3.0123565754633717) internal successors, (3413), 1133 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:27,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 3413 transitions. [2021-04-15 02:20:27,609 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 3413 transitions. Word has length 18 [2021-04-15 02:20:27,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:27,609 INFO L480 AbstractCegarLoop]: Abstraction has 1134 states and 3413 transitions. [2021-04-15 02:20:27,609 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 02:20:27,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 3413 transitions. [2021-04-15 02:20:27,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:27,611 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:27,611 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:27,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable439 [2021-04-15 02:20:27,825 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:27,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:27,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1513797642, now seen corresponding path program 60 times [2021-04-15 02:20:27,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:27,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576176609] [2021-04-15 02:20:27,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:27,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576176609] [2021-04-15 02:20:27,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084289817] [2021-04-15 02:20:27,881 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 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 02:20:27,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:20:27,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:27,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:27,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:27,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:27,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:20:27,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407520992] [2021-04-15 02:20:27,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:20:27,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:27,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:20:27,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:27,943 INFO L87 Difference]: Start difference. First operand 1134 states and 3413 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 02:20:28,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:28,095 INFO L93 Difference]: Finished difference Result 1469 states and 4201 transitions. [2021-04-15 02:20:28,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:20:28,095 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 02:20:28,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:28,098 INFO L225 Difference]: With dead ends: 1469 [2021-04-15 02:20:28,098 INFO L226 Difference]: Without dead ends: 1469 [2021-04-15 02:20:28,099 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:20:28,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2021-04-15 02:20:28,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1145. [2021-04-15 02:20:28,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1144 states have (on average 3.015734265734266) internal successors, (3450), 1144 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:28,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 3450 transitions. [2021-04-15 02:20:28,121 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 3450 transitions. Word has length 18 [2021-04-15 02:20:28,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:28,121 INFO L480 AbstractCegarLoop]: Abstraction has 1145 states and 3450 transitions. [2021-04-15 02:20:28,121 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 02:20:28,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 3450 transitions. [2021-04-15 02:20:28,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:28,123 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:28,123 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:28,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:28,345 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:28,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:28,345 INFO L82 PathProgramCache]: Analyzing trace with hash 236267782, now seen corresponding path program 61 times [2021-04-15 02:20:28,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:28,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491401556] [2021-04-15 02:20:28,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:28,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491401556] [2021-04-15 02:20:28,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893625702] [2021-04-15 02:20:28,398 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:20:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:28,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:28,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:28,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:28,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:20:28,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032255808] [2021-04-15 02:20:28,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:20:28,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:28,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:20:28,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:20:28,472 INFO L87 Difference]: Start difference. First operand 1145 states and 3450 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 02:20:28,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:28,582 INFO L93 Difference]: Finished difference Result 1280 states and 3655 transitions. [2021-04-15 02:20:28,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:20:28,582 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 02:20:28,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:28,584 INFO L225 Difference]: With dead ends: 1280 [2021-04-15 02:20:28,584 INFO L226 Difference]: Without dead ends: 1276 [2021-04-15 02:20:28,584 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:20:28,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-04-15 02:20:28,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1116. [2021-04-15 02:20:28,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 3.0053811659192826) internal successors, (3351), 1115 states have internal predecessors, (3351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:28,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 3351 transitions. [2021-04-15 02:20:28,598 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 3351 transitions. Word has length 18 [2021-04-15 02:20:28,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:28,598 INFO L480 AbstractCegarLoop]: Abstraction has 1116 states and 3351 transitions. [2021-04-15 02:20:28,598 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 02:20:28,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 3351 transitions. [2021-04-15 02:20:28,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:28,600 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:28,600 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:28,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-04-15 02:20:28,805 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:28,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:28,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1954016842, now seen corresponding path program 62 times [2021-04-15 02:20:28,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:28,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457977018] [2021-04-15 02:20:28,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:28,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457977018] [2021-04-15 02:20:28,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979100160] [2021-04-15 02:20:28,850 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:28,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:28,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:28,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:28,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:28,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:28,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:20:28,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022285617] [2021-04-15 02:20:28,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:20:28,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:28,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:20:28,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:20:28,906 INFO L87 Difference]: Start difference. First operand 1116 states and 3351 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 02:20:28,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:28,960 INFO L93 Difference]: Finished difference Result 1248 states and 3538 transitions. [2021-04-15 02:20:28,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:20:28,961 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 02:20:28,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:28,966 INFO L225 Difference]: With dead ends: 1248 [2021-04-15 02:20:28,966 INFO L226 Difference]: Without dead ends: 1248 [2021-04-15 02:20:28,966 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:28,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-04-15 02:20:28,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1114. [2021-04-15 02:20:28,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 3.0017969451931714) internal successors, (3341), 1113 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:28,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 3341 transitions. [2021-04-15 02:20:28,983 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 3341 transitions. Word has length 18 [2021-04-15 02:20:28,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:28,983 INFO L480 AbstractCegarLoop]: Abstraction has 1114 states and 3341 transitions. [2021-04-15 02:20:28,983 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 02:20:28,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 3341 transitions. [2021-04-15 02:20:28,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:28,984 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:28,984 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:29,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable442,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:29,205 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:29,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:29,206 INFO L82 PathProgramCache]: Analyzing trace with hash 224969508, now seen corresponding path program 63 times [2021-04-15 02:20:29,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:29,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872040773] [2021-04-15 02:20:29,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:29,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872040773] [2021-04-15 02:20:29,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424035858] [2021-04-15 02:20:29,255 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 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 02:20:29,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:20:29,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:29,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:29,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:29,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:29,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:20:29,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053769871] [2021-04-15 02:20:29,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:20:29,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:29,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:20:29,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:29,340 INFO L87 Difference]: Start difference. First operand 1114 states and 3341 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 02:20:29,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:29,410 INFO L93 Difference]: Finished difference Result 1212 states and 3446 transitions. [2021-04-15 02:20:29,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:20:29,410 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 02:20:29,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:29,413 INFO L225 Difference]: With dead ends: 1212 [2021-04-15 02:20:29,413 INFO L226 Difference]: Without dead ends: 1212 [2021-04-15 02:20:29,413 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:29,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-04-15 02:20:29,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1096. [2021-04-15 02:20:29,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 2.992694063926941) internal successors, (3277), 1095 states have internal predecessors, (3277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3277 transitions. [2021-04-15 02:20:29,434 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3277 transitions. Word has length 18 [2021-04-15 02:20:29,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:29,434 INFO L480 AbstractCegarLoop]: Abstraction has 1096 states and 3277 transitions. [2021-04-15 02:20:29,434 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 02:20:29,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3277 transitions. [2021-04-15 02:20:29,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:29,436 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:29,436 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:29,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-04-15 02:20:29,658 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:29,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:29,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1835890294, now seen corresponding path program 64 times [2021-04-15 02:20:29,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:29,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974391616] [2021-04-15 02:20:29,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:29,725 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:29,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974391616] [2021-04-15 02:20:29,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926492500] [2021-04-15 02:20:29,726 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 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 02:20:29,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:29,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:29,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:29,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:29,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:29,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:20:29,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544869372] [2021-04-15 02:20:29,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:29,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:29,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:29,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:29,789 INFO L87 Difference]: Start difference. First operand 1096 states and 3277 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 02:20:29,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:29,901 INFO L93 Difference]: Finished difference Result 1269 states and 3581 transitions. [2021-04-15 02:20:29,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:20:29,902 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 18 [2021-04-15 02:20:29,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:29,905 INFO L225 Difference]: With dead ends: 1269 [2021-04-15 02:20:29,905 INFO L226 Difference]: Without dead ends: 1269 [2021-04-15 02:20:29,905 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:20:29,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-04-15 02:20:29,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1069. [2021-04-15 02:20:29,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 2.985955056179775) internal successors, (3189), 1068 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:29,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3189 transitions. [2021-04-15 02:20:29,922 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3189 transitions. Word has length 18 [2021-04-15 02:20:29,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:29,922 INFO L480 AbstractCegarLoop]: Abstraction has 1069 states and 3189 transitions. [2021-04-15 02:20:29,922 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 02:20:29,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3189 transitions. [2021-04-15 02:20:29,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:29,924 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:29,924 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:30,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-04-15 02:20:30,145 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:30,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:30,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1298034716, now seen corresponding path program 65 times [2021-04-15 02:20:30,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:30,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362691761] [2021-04-15 02:20:30,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:30,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:30,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362691761] [2021-04-15 02:20:30,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000188857] [2021-04-15 02:20:30,220 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:20:30,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:20:30,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:30,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:30,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:30,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:30,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:20:30,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549268601] [2021-04-15 02:20:30,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:30,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:30,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:30,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:30,294 INFO L87 Difference]: Start difference. First operand 1069 states and 3189 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 02:20:30,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:30,406 INFO L93 Difference]: Finished difference Result 1385 states and 3940 transitions. [2021-04-15 02:20:30,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:20:30,407 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 18 [2021-04-15 02:20:30,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:30,410 INFO L225 Difference]: With dead ends: 1385 [2021-04-15 02:20:30,410 INFO L226 Difference]: Without dead ends: 1385 [2021-04-15 02:20:30,410 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:20:30,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-04-15 02:20:30,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1117. [2021-04-15 02:20:30,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 2.9946236559139785) internal successors, (3342), 1116 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:30,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 3342 transitions. [2021-04-15 02:20:30,431 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 3342 transitions. Word has length 18 [2021-04-15 02:20:30,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:30,431 INFO L480 AbstractCegarLoop]: Abstraction has 1117 states and 3342 transitions. [2021-04-15 02:20:30,431 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 02:20:30,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 3342 transitions. [2021-04-15 02:20:30,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:30,433 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:30,433 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:30,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-04-15 02:20:30,656 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:30,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:30,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1804380982, now seen corresponding path program 66 times [2021-04-15 02:20:30,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:30,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800124429] [2021-04-15 02:20:30,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:30,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:30,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800124429] [2021-04-15 02:20:30,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468390822] [2021-04-15 02:20:30,719 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 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 02:20:30,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:20:30,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:30,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:30,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:30,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:30,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:20:30,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387666357] [2021-04-15 02:20:30,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:30,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:30,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:30,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:30,793 INFO L87 Difference]: Start difference. First operand 1117 states and 3342 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 02:20:30,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:30,991 INFO L93 Difference]: Finished difference Result 1491 states and 4244 transitions. [2021-04-15 02:20:30,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:20:30,992 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 18 [2021-04-15 02:20:30,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:30,993 INFO L225 Difference]: With dead ends: 1491 [2021-04-15 02:20:30,994 INFO L226 Difference]: Without dead ends: 1491 [2021-04-15 02:20:30,994 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:20:30,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2021-04-15 02:20:31,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1299. [2021-04-15 02:20:31,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.010785824345146) internal successors, (3908), 1298 states have internal predecessors, (3908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:31,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3908 transitions. [2021-04-15 02:20:31,015 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3908 transitions. Word has length 18 [2021-04-15 02:20:31,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:31,015 INFO L480 AbstractCegarLoop]: Abstraction has 1299 states and 3908 transitions. [2021-04-15 02:20:31,015 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 02:20:31,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3908 transitions. [2021-04-15 02:20:31,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:31,017 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:31,017 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:31,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:31,239 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:31,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:31,239 INFO L82 PathProgramCache]: Analyzing trace with hash -357725678, now seen corresponding path program 67 times [2021-04-15 02:20:31,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:31,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813316028] [2021-04-15 02:20:31,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:31,285 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:31,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813316028] [2021-04-15 02:20:31,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236826439] [2021-04-15 02:20:31,285 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 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 02:20:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:31,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:31,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:31,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:31,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:20:31,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077557059] [2021-04-15 02:20:31,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:20:31,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:31,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:20:31,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:20:31,345 INFO L87 Difference]: Start difference. First operand 1299 states and 3908 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 02:20:31,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:31,471 INFO L93 Difference]: Finished difference Result 1466 states and 4238 transitions. [2021-04-15 02:20:31,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:20:31,472 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 18 [2021-04-15 02:20:31,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:31,477 INFO L225 Difference]: With dead ends: 1466 [2021-04-15 02:20:31,478 INFO L226 Difference]: Without dead ends: 1462 [2021-04-15 02:20:31,478 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:20:31,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-04-15 02:20:31,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1236. [2021-04-15 02:20:31,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 3.0) internal successors, (3705), 1235 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 3705 transitions. [2021-04-15 02:20:31,498 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 3705 transitions. Word has length 18 [2021-04-15 02:20:31,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:31,498 INFO L480 AbstractCegarLoop]: Abstraction has 1236 states and 3705 transitions. [2021-04-15 02:20:31,498 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 02:20:31,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 3705 transitions. [2021-04-15 02:20:31,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:31,500 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:31,500 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:31,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-04-15 02:20:31,722 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:31,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:31,722 INFO L82 PathProgramCache]: Analyzing trace with hash 2084201938, now seen corresponding path program 68 times [2021-04-15 02:20:31,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:31,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438318686] [2021-04-15 02:20:31,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:31,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438318686] [2021-04-15 02:20:31,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509338490] [2021-04-15 02:20:31,777 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:20:31,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:31,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:31,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:31,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:31,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:31,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:20:31,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547389459] [2021-04-15 02:20:31,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:20:31,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:31,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:20:31,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:31,851 INFO L87 Difference]: Start difference. First operand 1236 states and 3705 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 02:20:31,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:31,987 INFO L93 Difference]: Finished difference Result 1717 states and 4942 transitions. [2021-04-15 02:20:31,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:20:31,988 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 02:20:31,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:31,990 INFO L225 Difference]: With dead ends: 1717 [2021-04-15 02:20:31,990 INFO L226 Difference]: Without dead ends: 1717 [2021-04-15 02:20:31,990 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:20:31,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2021-04-15 02:20:32,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1445. [2021-04-15 02:20:32,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 3.020083102493075) internal successors, (4361), 1444 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:32,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 4361 transitions. [2021-04-15 02:20:32,013 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 4361 transitions. Word has length 18 [2021-04-15 02:20:32,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:32,013 INFO L480 AbstractCegarLoop]: Abstraction has 1445 states and 4361 transitions. [2021-04-15 02:20:32,013 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 02:20:32,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 4361 transitions. [2021-04-15 02:20:32,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:32,015 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:32,015 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:32,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-04-15 02:20:32,230 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:32,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:32,230 INFO L82 PathProgramCache]: Analyzing trace with hash -727630420, now seen corresponding path program 69 times [2021-04-15 02:20:32,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:32,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247889473] [2021-04-15 02:20:32,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:32,287 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:32,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247889473] [2021-04-15 02:20:32,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392148684] [2021-04-15 02:20:32,287 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:32,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:20:32,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:32,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:32,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:32,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:32,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:20:32,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977480534] [2021-04-15 02:20:32,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:32,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:32,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:32,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:32,359 INFO L87 Difference]: Start difference. First operand 1445 states and 4361 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 02:20:32,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:32,471 INFO L93 Difference]: Finished difference Result 1815 states and 5279 transitions. [2021-04-15 02:20:32,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:20:32,471 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 18 [2021-04-15 02:20:32,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:32,473 INFO L225 Difference]: With dead ends: 1815 [2021-04-15 02:20:32,473 INFO L226 Difference]: Without dead ends: 1815 [2021-04-15 02:20:32,476 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:20:32,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-04-15 02:20:32,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1189. [2021-04-15 02:20:32,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 2.9974747474747474) internal successors, (3561), 1188 states have internal predecessors, (3561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:32,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3561 transitions. [2021-04-15 02:20:32,492 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3561 transitions. Word has length 18 [2021-04-15 02:20:32,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:32,492 INFO L480 AbstractCegarLoop]: Abstraction has 1189 states and 3561 transitions. [2021-04-15 02:20:32,492 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 02:20:32,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3561 transitions. [2021-04-15 02:20:32,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:32,494 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:32,494 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:32,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-04-15 02:20:32,694 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:32,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:32,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1233976686, now seen corresponding path program 70 times [2021-04-15 02:20:32,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:32,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015728301] [2021-04-15 02:20:32,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:32,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015728301] [2021-04-15 02:20:32,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237928389] [2021-04-15 02:20:32,752 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 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 02:20:32,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:32,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:32,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:32,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:32,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:32,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:20:32,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921317601] [2021-04-15 02:20:32,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:32,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:32,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:32,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:32,810 INFO L87 Difference]: Start difference. First operand 1189 states and 3561 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 02:20:32,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:32,989 INFO L93 Difference]: Finished difference Result 1539 states and 4366 transitions. [2021-04-15 02:20:32,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:20:32,990 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 18 [2021-04-15 02:20:32,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:32,991 INFO L225 Difference]: With dead ends: 1539 [2021-04-15 02:20:32,991 INFO L226 Difference]: Without dead ends: 1539 [2021-04-15 02:20:32,991 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 157.7ms TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:20:32,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-04-15 02:20:33,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1195. [2021-04-15 02:20:33,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1194 states have (on average 2.9983249581239533) internal successors, (3580), 1194 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:33,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 3580 transitions. [2021-04-15 02:20:33,008 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 3580 transitions. Word has length 18 [2021-04-15 02:20:33,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:33,009 INFO L480 AbstractCegarLoop]: Abstraction has 1195 states and 3580 transitions. [2021-04-15 02:20:33,009 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 02:20:33,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 3580 transitions. [2021-04-15 02:20:33,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:33,010 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:33,010 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:33,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:33,225 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:33,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:33,225 INFO L82 PathProgramCache]: Analyzing trace with hash -460785100, now seen corresponding path program 71 times [2021-04-15 02:20:33,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:33,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894685762] [2021-04-15 02:20:33,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:33,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:33,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894685762] [2021-04-15 02:20:33,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455702618] [2021-04-15 02:20:33,276 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:20:33,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:20:33,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:33,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:33,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:33,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:33,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:20:33,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403659140] [2021-04-15 02:20:33,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:20:33,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:33,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:20:33,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:20:33,351 INFO L87 Difference]: Start difference. First operand 1195 states and 3580 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 02:20:33,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:33,472 INFO L93 Difference]: Finished difference Result 1319 states and 3767 transitions. [2021-04-15 02:20:33,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:20:33,472 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 02:20:33,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:33,474 INFO L225 Difference]: With dead ends: 1319 [2021-04-15 02:20:33,474 INFO L226 Difference]: Without dead ends: 1315 [2021-04-15 02:20:33,474 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:20:33,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-04-15 02:20:33,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1219. [2021-04-15 02:20:33,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.0) internal successors, (3654), 1218 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:33,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 3654 transitions. [2021-04-15 02:20:33,488 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 3654 transitions. Word has length 18 [2021-04-15 02:20:33,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:33,488 INFO L480 AbstractCegarLoop]: Abstraction has 1219 states and 3654 transitions. [2021-04-15 02:20:33,488 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 02:20:33,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 3654 transitions. [2021-04-15 02:20:33,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:33,489 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:33,489 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:33,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:33,690 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:33,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:33,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1256963960, now seen corresponding path program 72 times [2021-04-15 02:20:33,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:33,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697881148] [2021-04-15 02:20:33,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:33,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:33,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697881148] [2021-04-15 02:20:33,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384279601] [2021-04-15 02:20:33,741 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 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 02:20:33,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:20:33,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:33,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:33,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:33,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:33,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:20:33,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711703897] [2021-04-15 02:20:33,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:20:33,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:33,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:20:33,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:20:33,811 INFO L87 Difference]: Start difference. First operand 1219 states and 3654 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 02:20:33,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:33,876 INFO L93 Difference]: Finished difference Result 1350 states and 3852 transitions. [2021-04-15 02:20:33,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:20:33,877 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 02:20:33,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:33,878 INFO L225 Difference]: With dead ends: 1350 [2021-04-15 02:20:33,878 INFO L226 Difference]: Without dead ends: 1350 [2021-04-15 02:20:33,878 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:33,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-04-15 02:20:33,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1220. [2021-04-15 02:20:33,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1219 states have (on average 3.0) internal successors, (3657), 1219 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:33,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 3657 transitions. [2021-04-15 02:20:33,892 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 3657 transitions. Word has length 18 [2021-04-15 02:20:33,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:33,892 INFO L480 AbstractCegarLoop]: Abstraction has 1220 states and 3657 transitions. [2021-04-15 02:20:33,892 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 02:20:33,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 3657 transitions. [2021-04-15 02:20:33,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:33,893 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:33,893 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:34,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:34,094 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:34,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:34,094 INFO L82 PathProgramCache]: Analyzing trace with hash -472083374, now seen corresponding path program 73 times [2021-04-15 02:20:34,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:34,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053482090] [2021-04-15 02:20:34,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:34,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053482090] [2021-04-15 02:20:34,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908534654] [2021-04-15 02:20:34,142 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 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 02:20:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:34,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:34,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:34,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:34,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:20:34,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379900166] [2021-04-15 02:20:34,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:20:34,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:34,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:20:34,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:34,211 INFO L87 Difference]: Start difference. First operand 1220 states and 3657 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 02:20:34,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:34,286 INFO L93 Difference]: Finished difference Result 1356 states and 3865 transitions. [2021-04-15 02:20:34,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:20:34,286 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 02:20:34,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:34,288 INFO L225 Difference]: With dead ends: 1356 [2021-04-15 02:20:34,288 INFO L226 Difference]: Without dead ends: 1356 [2021-04-15 02:20:34,288 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:20:34,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-04-15 02:20:34,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1215. [2021-04-15 02:20:34,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 2.9975288303130148) internal successors, (3639), 1214 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:34,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3639 transitions. [2021-04-15 02:20:34,302 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3639 transitions. Word has length 18 [2021-04-15 02:20:34,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:34,302 INFO L480 AbstractCegarLoop]: Abstraction has 1215 states and 3639 transitions. [2021-04-15 02:20:34,302 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 02:20:34,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3639 transitions. [2021-04-15 02:20:34,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:34,303 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:34,304 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:34,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-04-15 02:20:34,504 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:34,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:34,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1762024120, now seen corresponding path program 74 times [2021-04-15 02:20:34,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:34,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081399504] [2021-04-15 02:20:34,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:34,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:34,557 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:34,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081399504] [2021-04-15 02:20:34,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100246048] [2021-04-15 02:20:34,558 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:20:34,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:34,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:34,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:34,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:34,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:34,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:20:34,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112889172] [2021-04-15 02:20:34,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:20:34,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:34,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:20:34,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:34,628 INFO L87 Difference]: Start difference. First operand 1215 states and 3639 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 02:20:34,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:34,700 INFO L93 Difference]: Finished difference Result 1623 states and 4723 transitions. [2021-04-15 02:20:34,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:20:34,700 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 02:20:34,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:34,703 INFO L225 Difference]: With dead ends: 1623 [2021-04-15 02:20:34,703 INFO L226 Difference]: Without dead ends: 1623 [2021-04-15 02:20:34,703 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:34,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-04-15 02:20:34,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1529. [2021-04-15 02:20:34,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.017670157068063) internal successors, (4611), 1528 states have internal predecessors, (4611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:34,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4611 transitions. [2021-04-15 02:20:34,729 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4611 transitions. Word has length 18 [2021-04-15 02:20:34,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:34,729 INFO L480 AbstractCegarLoop]: Abstraction has 1529 states and 4611 transitions. [2021-04-15 02:20:34,729 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 02:20:34,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4611 transitions. [2021-04-15 02:20:34,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:34,732 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:34,732 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:34,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-04-15 02:20:34,956 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:34,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:34,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1995087598, now seen corresponding path program 75 times [2021-04-15 02:20:34,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:34,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558230443] [2021-04-15 02:20:34,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:35,021 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:35,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558230443] [2021-04-15 02:20:35,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996069204] [2021-04-15 02:20:35,021 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 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 02:20:35,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:20:35,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:35,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:35,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:35,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:35,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:20:35,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282367803] [2021-04-15 02:20:35,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:35,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:35,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:35,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:35,091 INFO L87 Difference]: Start difference. First operand 1529 states and 4611 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 02:20:35,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:35,210 INFO L93 Difference]: Finished difference Result 1693 states and 4893 transitions. [2021-04-15 02:20:35,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:20:35,211 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 18 [2021-04-15 02:20:35,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:35,212 INFO L225 Difference]: With dead ends: 1693 [2021-04-15 02:20:35,212 INFO L226 Difference]: Without dead ends: 1693 [2021-04-15 02:20:35,212 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:20:35,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2021-04-15 02:20:35,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1537. [2021-04-15 02:20:35,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 3.017578125) internal successors, (4635), 1536 states have internal predecessors, (4635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:35,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 4635 transitions. [2021-04-15 02:20:35,228 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 4635 transitions. Word has length 18 [2021-04-15 02:20:35,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:35,228 INFO L480 AbstractCegarLoop]: Abstraction has 1537 states and 4635 transitions. [2021-04-15 02:20:35,228 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 02:20:35,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 4635 transitions. [2021-04-15 02:20:35,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:35,229 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:35,230 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:35,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-04-15 02:20:35,430 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:35,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:35,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1793533432, now seen corresponding path program 76 times [2021-04-15 02:20:35,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:35,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246267942] [2021-04-15 02:20:35,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:35,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:35,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246267942] [2021-04-15 02:20:35,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448004899] [2021-04-15 02:20:35,490 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:20:35,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:35,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:35,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:35,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:35,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:35,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:20:35,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869981445] [2021-04-15 02:20:35,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:35,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:35,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:35,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:35,559 INFO L87 Difference]: Start difference. First operand 1537 states and 4635 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 02:20:35,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:35,712 INFO L93 Difference]: Finished difference Result 1777 states and 5185 transitions. [2021-04-15 02:20:35,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:20:35,713 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 18 [2021-04-15 02:20:35,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:35,715 INFO L225 Difference]: With dead ends: 1777 [2021-04-15 02:20:35,715 INFO L226 Difference]: Without dead ends: 1777 [2021-04-15 02:20:35,715 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:20:35,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-04-15 02:20:35,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1651. [2021-04-15 02:20:35,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.0187878787878786) internal successors, (4981), 1650 states have internal predecessors, (4981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:35,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 4981 transitions. [2021-04-15 02:20:35,740 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 4981 transitions. Word has length 18 [2021-04-15 02:20:35,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:35,740 INFO L480 AbstractCegarLoop]: Abstraction has 1651 states and 4981 transitions. [2021-04-15 02:20:35,740 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 02:20:35,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 4981 transitions. [2021-04-15 02:20:35,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:35,742 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:35,742 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:35,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-04-15 02:20:35,959 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:35,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:35,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1018298926, now seen corresponding path program 77 times [2021-04-15 02:20:35,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:35,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325613304] [2021-04-15 02:20:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:36,015 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:36,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325613304] [2021-04-15 02:20:36,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027398543] [2021-04-15 02:20:36,016 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 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 02:20:36,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:20:36,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:36,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:36,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:36,072 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:36,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:36,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:20:36,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540828969] [2021-04-15 02:20:36,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:36,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:36,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:36,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:36,073 INFO L87 Difference]: Start difference. First operand 1651 states and 4981 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 02:20:36,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:36,271 INFO L93 Difference]: Finished difference Result 1973 states and 5717 transitions. [2021-04-15 02:20:36,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:20:36,271 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 18 [2021-04-15 02:20:36,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:36,273 INFO L225 Difference]: With dead ends: 1973 [2021-04-15 02:20:36,273 INFO L226 Difference]: Without dead ends: 1973 [2021-04-15 02:20:36,273 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 177.6ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:20:36,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2021-04-15 02:20:36,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1718. [2021-04-15 02:20:36,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 3.018054746651136) internal successors, (5182), 1717 states have internal predecessors, (5182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:36,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 5182 transitions. [2021-04-15 02:20:36,310 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 5182 transitions. Word has length 18 [2021-04-15 02:20:36,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:36,310 INFO L480 AbstractCegarLoop]: Abstraction has 1718 states and 5182 transitions. [2021-04-15 02:20:36,310 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 02:20:36,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 5182 transitions. [2021-04-15 02:20:36,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:36,312 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:36,312 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:36,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-04-15 02:20:36,513 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:36,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:36,513 INFO L82 PathProgramCache]: Analyzing trace with hash 144938314, now seen corresponding path program 78 times [2021-04-15 02:20:36,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:36,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483225782] [2021-04-15 02:20:36,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:36,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483225782] [2021-04-15 02:20:36,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690989167] [2021-04-15 02:20:36,589 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 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 02:20:36,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:20:36,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:36,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:36,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:36,651 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:36,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:36,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-04-15 02:20:36,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830967573] [2021-04-15 02:20:36,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:36,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:36,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:36,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:36,652 INFO L87 Difference]: Start difference. First operand 1718 states and 5182 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 02:20:36,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:36,854 INFO L93 Difference]: Finished difference Result 1834 states and 5328 transitions. [2021-04-15 02:20:36,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:20:36,854 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 18 [2021-04-15 02:20:36,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:36,856 INFO L225 Difference]: With dead ends: 1834 [2021-04-15 02:20:36,856 INFO L226 Difference]: Without dead ends: 1830 [2021-04-15 02:20:36,856 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:20:36,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2021-04-15 02:20:36,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1663. [2021-04-15 02:20:36,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 3.0138387484957883) internal successors, (5009), 1662 states have internal predecessors, (5009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:36,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5009 transitions. [2021-04-15 02:20:36,875 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5009 transitions. Word has length 18 [2021-04-15 02:20:36,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:36,875 INFO L480 AbstractCegarLoop]: Abstraction has 1663 states and 5009 transitions. [2021-04-15 02:20:36,875 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 02:20:36,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5009 transitions. [2021-04-15 02:20:36,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:36,876 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:36,876 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:37,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:37,077 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:37,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:37,077 INFO L82 PathProgramCache]: Analyzing trace with hash -731312694, now seen corresponding path program 79 times [2021-04-15 02:20:37,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:37,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978802986] [2021-04-15 02:20:37,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:37,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978802986] [2021-04-15 02:20:37,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139905639] [2021-04-15 02:20:37,146 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 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 02:20:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:37,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:37,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:37,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:37,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-04-15 02:20:37,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191421453] [2021-04-15 02:20:37,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:37,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:37,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:37,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:37,223 INFO L87 Difference]: Start difference. First operand 1663 states and 5009 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 02:20:37,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:37,488 INFO L93 Difference]: Finished difference Result 2513 states and 7307 transitions. [2021-04-15 02:20:37,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:20:37,488 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 18 [2021-04-15 02:20:37,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:37,491 INFO L225 Difference]: With dead ends: 2513 [2021-04-15 02:20:37,491 INFO L226 Difference]: Without dead ends: 2513 [2021-04-15 02:20:37,491 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 235.7ms TimeCoverageRelationStatistics Valid=375, Invalid=747, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:20:37,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-04-15 02:20:37,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 1818. [2021-04-15 02:20:37,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.0181618051733627) internal successors, (5484), 1817 states have internal predecessors, (5484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:37,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 5484 transitions. [2021-04-15 02:20:37,518 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 5484 transitions. Word has length 18 [2021-04-15 02:20:37,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:37,518 INFO L480 AbstractCegarLoop]: Abstraction has 1818 states and 5484 transitions. [2021-04-15 02:20:37,518 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 02:20:37,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 5484 transitions. [2021-04-15 02:20:37,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:37,521 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:37,521 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:37,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-04-15 02:20:37,721 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:37,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:37,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1998769872, now seen corresponding path program 80 times [2021-04-15 02:20:37,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:37,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396491967] [2021-04-15 02:20:37,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:37,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396491967] [2021-04-15 02:20:37,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425101967] [2021-04-15 02:20:37,801 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 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 02:20:37,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:37,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:37,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:37,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:37,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:37,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-04-15 02:20:37,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708622566] [2021-04-15 02:20:37,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:37,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:37,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:37,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:37,874 INFO L87 Difference]: Start difference. First operand 1818 states and 5484 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 02:20:38,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:38,152 INFO L93 Difference]: Finished difference Result 2122 states and 6163 transitions. [2021-04-15 02:20:38,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:20:38,152 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 18 [2021-04-15 02:20:38,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:38,154 INFO L225 Difference]: With dead ends: 2122 [2021-04-15 02:20:38,154 INFO L226 Difference]: Without dead ends: 2122 [2021-04-15 02:20:38,155 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 250.0ms TimeCoverageRelationStatistics Valid=331, Invalid=661, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:20:38,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-04-15 02:20:38,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1809. [2021-04-15 02:20:38,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 3.019358407079646) internal successors, (5459), 1808 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 02:20:38,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 5459 transitions. [2021-04-15 02:20:38,178 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 5459 transitions. Word has length 18 [2021-04-15 02:20:38,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:38,178 INFO L480 AbstractCegarLoop]: Abstraction has 1809 states and 5459 transitions. [2021-04-15 02:20:38,178 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 02:20:38,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 5459 transitions. [2021-04-15 02:20:38,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:38,180 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:38,180 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:38,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:38,381 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:38,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:38,381 INFO L82 PathProgramCache]: Analyzing trace with hash -515634934, now seen corresponding path program 81 times [2021-04-15 02:20:38,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:38,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419548879] [2021-04-15 02:20:38,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:38,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419548879] [2021-04-15 02:20:38,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535891552] [2021-04-15 02:20:38,450 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 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 02:20:38,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:20:38,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:38,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:38,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:38,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:38,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-04-15 02:20:38,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691809247] [2021-04-15 02:20:38,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:38,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:38,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:38,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:38,524 INFO L87 Difference]: Start difference. First operand 1809 states and 5459 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 02:20:38,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:38,763 INFO L93 Difference]: Finished difference Result 2135 states and 6194 transitions. [2021-04-15 02:20:38,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:20:38,763 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 18 [2021-04-15 02:20:38,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:38,766 INFO L225 Difference]: With dead ends: 2135 [2021-04-15 02:20:38,766 INFO L226 Difference]: Without dead ends: 2135 [2021-04-15 02:20:38,766 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 219.8ms TimeCoverageRelationStatistics Valid=325, Invalid=667, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:20:38,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-04-15 02:20:38,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 1814. [2021-04-15 02:20:38,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.0193050193050195) internal successors, (5474), 1813 states have internal predecessors, (5474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:38,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5474 transitions. [2021-04-15 02:20:38,791 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5474 transitions. Word has length 18 [2021-04-15 02:20:38,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:38,791 INFO L480 AbstractCegarLoop]: Abstraction has 1814 states and 5474 transitions. [2021-04-15 02:20:38,791 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 02:20:38,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5474 transitions. [2021-04-15 02:20:38,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:38,794 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:38,794 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:38,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:38,996 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:38,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:38,996 INFO L82 PathProgramCache]: Analyzing trace with hash -594587962, now seen corresponding path program 82 times [2021-04-15 02:20:38,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:38,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913762232] [2021-04-15 02:20:38,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:39,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913762232] [2021-04-15 02:20:39,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408236883] [2021-04-15 02:20:39,071 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 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 02:20:39,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:39,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:39,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:39,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:39,137 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:39,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:39,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-04-15 02:20:39,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416381340] [2021-04-15 02:20:39,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:39,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:39,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:39,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:39,138 INFO L87 Difference]: Start difference. First operand 1814 states and 5474 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 02:20:39,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:39,276 INFO L93 Difference]: Finished difference Result 2025 states and 5942 transitions. [2021-04-15 02:20:39,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:20:39,276 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 18 [2021-04-15 02:20:39,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:39,279 INFO L225 Difference]: With dead ends: 2025 [2021-04-15 02:20:39,279 INFO L226 Difference]: Without dead ends: 2023 [2021-04-15 02:20:39,279 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:20:39,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2021-04-15 02:20:39,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 1929. [2021-04-15 02:20:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1928 states have (on average 3.0264522821576763) internal successors, (5835), 1928 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:39,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 5835 transitions. [2021-04-15 02:20:39,303 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 5835 transitions. Word has length 18 [2021-04-15 02:20:39,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:39,303 INFO L480 AbstractCegarLoop]: Abstraction has 1929 states and 5835 transitions. [2021-04-15 02:20:39,303 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 02:20:39,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 5835 transitions. [2021-04-15 02:20:39,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:39,305 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:39,305 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:39,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:39,506 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:39,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:39,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1123161098, now seen corresponding path program 83 times [2021-04-15 02:20:39,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:39,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729293930] [2021-04-15 02:20:39,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:39,574 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:39,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729293930] [2021-04-15 02:20:39,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682722949] [2021-04-15 02:20:39,575 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:20:39,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:20:39,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:39,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:39,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:39,647 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:39,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:39,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-04-15 02:20:39,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476707695] [2021-04-15 02:20:39,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:39,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:39,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:39,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:39,649 INFO L87 Difference]: Start difference. First operand 1929 states and 5835 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 02:20:39,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:39,772 INFO L93 Difference]: Finished difference Result 2077 states and 6079 transitions. [2021-04-15 02:20:39,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:20:39,772 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 18 [2021-04-15 02:20:39,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:39,774 INFO L225 Difference]: With dead ends: 2077 [2021-04-15 02:20:39,774 INFO L226 Difference]: Without dead ends: 2077 [2021-04-15 02:20:39,774 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:20:39,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2021-04-15 02:20:39,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1931. [2021-04-15 02:20:39,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 3.0264248704663212) internal successors, (5841), 1930 states have internal predecessors, (5841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:39,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5841 transitions. [2021-04-15 02:20:39,795 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5841 transitions. Word has length 18 [2021-04-15 02:20:39,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:39,795 INFO L480 AbstractCegarLoop]: Abstraction has 1931 states and 5841 transitions. [2021-04-15 02:20:39,795 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 02:20:39,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5841 transitions. [2021-04-15 02:20:39,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:39,797 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:39,797 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:39,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2021-04-15 02:20:39,997 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:39,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:39,997 INFO L82 PathProgramCache]: Analyzing trace with hash -605886236, now seen corresponding path program 84 times [2021-04-15 02:20:39,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:39,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329557478] [2021-04-15 02:20:39,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:40,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329557478] [2021-04-15 02:20:40,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966416640] [2021-04-15 02:20:40,054 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 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 02:20:40,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:20:40,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:40,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:40,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:40,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:40,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-04-15 02:20:40,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166986122] [2021-04-15 02:20:40,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:40,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:40,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:40,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:40,129 INFO L87 Difference]: Start difference. First operand 1931 states and 5841 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 02:20:40,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:40,289 INFO L93 Difference]: Finished difference Result 2122 states and 6197 transitions. [2021-04-15 02:20:40,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:20:40,289 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 18 [2021-04-15 02:20:40,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:40,292 INFO L225 Difference]: With dead ends: 2122 [2021-04-15 02:20:40,292 INFO L226 Difference]: Without dead ends: 2122 [2021-04-15 02:20:40,292 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:20:40,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-04-15 02:20:40,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1939. [2021-04-15 02:20:40,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 3.026315789473684) internal successors, (5865), 1938 states have internal predecessors, (5865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:40,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5865 transitions. [2021-04-15 02:20:40,324 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5865 transitions. Word has length 18 [2021-04-15 02:20:40,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:40,324 INFO L480 AbstractCegarLoop]: Abstraction has 1939 states and 5865 transitions. [2021-04-15 02:20:40,324 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 02:20:40,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5865 transitions. [2021-04-15 02:20:40,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:40,326 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:40,326 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:40,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-04-15 02:20:40,526 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:40,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:40,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1628221258, now seen corresponding path program 85 times [2021-04-15 02:20:40,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:40,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260065571] [2021-04-15 02:20:40,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:40,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260065571] [2021-04-15 02:20:40,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822481487] [2021-04-15 02:20:40,585 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 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 02:20:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:40,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:40,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:40,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:40,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-04-15 02:20:40,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586063236] [2021-04-15 02:20:40,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:40,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:40,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:40,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:40,651 INFO L87 Difference]: Start difference. First operand 1939 states and 5865 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 02:20:40,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:40,787 INFO L93 Difference]: Finished difference Result 2505 states and 7377 transitions. [2021-04-15 02:20:40,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:20:40,787 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 18 [2021-04-15 02:20:40,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:40,790 INFO L225 Difference]: With dead ends: 2505 [2021-04-15 02:20:40,790 INFO L226 Difference]: Without dead ends: 2505 [2021-04-15 02:20:40,790 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 136.9ms TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:20:40,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2021-04-15 02:20:40,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2323. [2021-04-15 02:20:40,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2323 states, 2322 states have (on average 3.0353143841515933) internal successors, (7048), 2322 states have internal predecessors, (7048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:40,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 7048 transitions. [2021-04-15 02:20:40,817 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 7048 transitions. Word has length 18 [2021-04-15 02:20:40,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:40,817 INFO L480 AbstractCegarLoop]: Abstraction has 2323 states and 7048 transitions. [2021-04-15 02:20:40,818 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 02:20:40,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 7048 transitions. [2021-04-15 02:20:40,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:40,820 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:40,820 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:41,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-04-15 02:20:41,020 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:41,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:41,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2128890460, now seen corresponding path program 86 times [2021-04-15 02:20:41,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:41,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993535714] [2021-04-15 02:20:41,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:41,081 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:41,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993535714] [2021-04-15 02:20:41,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944813566] [2021-04-15 02:20:41,081 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 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 02:20:41,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:41,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:41,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:41,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:41,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:41,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-04-15 02:20:41,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686406725] [2021-04-15 02:20:41,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:41,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:41,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:41,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:41,147 INFO L87 Difference]: Start difference. First operand 2323 states and 7048 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 02:20:41,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:41,290 INFO L93 Difference]: Finished difference Result 2489 states and 7427 transitions. [2021-04-15 02:20:41,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:20:41,290 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 18 [2021-04-15 02:20:41,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:41,292 INFO L225 Difference]: With dead ends: 2489 [2021-04-15 02:20:41,292 INFO L226 Difference]: Without dead ends: 2489 [2021-04-15 02:20:41,292 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 146.2ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:20:41,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2489 states. [2021-04-15 02:20:41,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2489 to 2409. [2021-04-15 02:20:41,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 3.034468438538206) internal successors, (7307), 2408 states have internal predecessors, (7307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:41,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 7307 transitions. [2021-04-15 02:20:41,318 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 7307 transitions. Word has length 18 [2021-04-15 02:20:41,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:41,318 INFO L480 AbstractCegarLoop]: Abstraction has 2409 states and 7307 transitions. [2021-04-15 02:20:41,318 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 02:20:41,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 7307 transitions. [2021-04-15 02:20:41,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:41,320 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:41,320 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:41,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-04-15 02:20:41,521 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:41,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:41,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1659730570, now seen corresponding path program 87 times [2021-04-15 02:20:41,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:41,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073425932] [2021-04-15 02:20:41,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:41,613 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:41,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073425932] [2021-04-15 02:20:41,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151785169] [2021-04-15 02:20:41,614 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 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 02:20:41,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:20:41,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:41,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:41,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:41,694 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:41,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:41,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-04-15 02:20:41,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756119045] [2021-04-15 02:20:41,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:20:41,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:41,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:20:41,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:41,695 INFO L87 Difference]: Start difference. First operand 2409 states and 7307 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 02:20:41,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:41,920 INFO L93 Difference]: Finished difference Result 2555 states and 7581 transitions. [2021-04-15 02:20:41,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:20:41,920 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 18 [2021-04-15 02:20:41,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:41,923 INFO L225 Difference]: With dead ends: 2555 [2021-04-15 02:20:41,924 INFO L226 Difference]: Without dead ends: 2555 [2021-04-15 02:20:41,924 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 246.5ms TimeCoverageRelationStatistics Valid=275, Invalid=595, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:20:41,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-04-15 02:20:41,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 2408. [2021-04-15 02:20:41,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 3.0344827586206895) internal successors, (7304), 2407 states have internal predecessors, (7304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:41,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 7304 transitions. [2021-04-15 02:20:41,952 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 7304 transitions. Word has length 18 [2021-04-15 02:20:41,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:41,952 INFO L480 AbstractCegarLoop]: Abstraction has 2408 states and 7304 transitions. [2021-04-15 02:20:41,952 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 02:20:41,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 7304 transitions. [2021-04-15 02:20:41,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:41,954 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:41,954 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:42,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:42,155 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:42,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:42,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1152101788, now seen corresponding path program 88 times [2021-04-15 02:20:42,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:42,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146407991] [2021-04-15 02:20:42,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:42,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146407991] [2021-04-15 02:20:42,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187874145] [2021-04-15 02:20:42,235 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 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 02:20:42,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:42,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:42,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:42,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:42,310 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:42,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:42,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-04-15 02:20:42,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005581139] [2021-04-15 02:20:42,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:20:42,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:42,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:20:42,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:42,311 INFO L87 Difference]: Start difference. First operand 2408 states and 7304 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 02:20:42,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:42,501 INFO L93 Difference]: Finished difference Result 2601 states and 7724 transitions. [2021-04-15 02:20:42,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:20:42,502 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 18 [2021-04-15 02:20:42,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:42,504 INFO L225 Difference]: With dead ends: 2601 [2021-04-15 02:20:42,504 INFO L226 Difference]: Without dead ends: 2601 [2021-04-15 02:20:42,504 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 201.1ms TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:20:42,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-04-15 02:20:42,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2436. [2021-04-15 02:20:42,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2436 states, 2435 states have (on average 3.0340862422997947) internal successors, (7388), 2435 states have internal predecessors, (7388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:42,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 7388 transitions. [2021-04-15 02:20:42,528 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 7388 transitions. Word has length 18 [2021-04-15 02:20:42,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:42,528 INFO L480 AbstractCegarLoop]: Abstraction has 2436 states and 7388 transitions. [2021-04-15 02:20:42,528 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 02:20:42,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 7388 transitions. [2021-04-15 02:20:42,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:20:42,530 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:42,530 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:42,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:42,731 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:42,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:42,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1875408330, now seen corresponding path program 89 times [2021-04-15 02:20:42,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:42,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537807749] [2021-04-15 02:20:42,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:42,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537807749] [2021-04-15 02:20:42,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150765982] [2021-04-15 02:20:42,819 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 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 02:20:42,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:20:42,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:42,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:42,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:42,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:42,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-04-15 02:20:42,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130776496] [2021-04-15 02:20:42,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:20:42,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:42,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:20:42,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:20:42,929 INFO L87 Difference]: Start difference. First operand 2436 states and 7388 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:20:43,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:43,238 INFO L93 Difference]: Finished difference Result 2926 states and 8621 transitions. [2021-04-15 02:20:43,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:20:43,239 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 18 [2021-04-15 02:20:43,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:43,242 INFO L225 Difference]: With dead ends: 2926 [2021-04-15 02:20:43,242 INFO L226 Difference]: Without dead ends: 2926 [2021-04-15 02:20:43,242 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 296.8ms TimeCoverageRelationStatistics Valid=393, Invalid=867, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 02:20:43,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-04-15 02:20:43,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2460. [2021-04-15 02:20:43,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 2459 states have (on average 3.0337535583570556) internal successors, (7460), 2459 states have internal predecessors, (7460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:43,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 7460 transitions. [2021-04-15 02:20:43,272 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 7460 transitions. Word has length 18 [2021-04-15 02:20:43,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:43,272 INFO L480 AbstractCegarLoop]: Abstraction has 2460 states and 7460 transitions. [2021-04-15 02:20:43,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:20:43,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 7460 transitions. [2021-04-15 02:20:43,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:43,274 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:43,274 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:43,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-04-15 02:20:43,475 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:43,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:43,475 INFO L82 PathProgramCache]: Analyzing trace with hash -892568151, now seen corresponding path program 90 times [2021-04-15 02:20:43,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:43,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522410808] [2021-04-15 02:20:43,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:43,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522410808] [2021-04-15 02:20:43,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005961435] [2021-04-15 02:20:43,563 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 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 02:20:43,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:20:43,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:43,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:43,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:20:43,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:43,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-04-15 02:20:43,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819185776] [2021-04-15 02:20:43,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:20:43,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:43,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:20:43,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:20:43,666 INFO L87 Difference]: Start difference. First operand 2460 states and 7460 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:43,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:43,833 INFO L93 Difference]: Finished difference Result 2653 states and 7746 transitions. [2021-04-15 02:20:43,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:20:43,834 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 02:20:43,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:43,836 INFO L225 Difference]: With dead ends: 2653 [2021-04-15 02:20:43,836 INFO L226 Difference]: Without dead ends: 2647 [2021-04-15 02:20:43,836 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:20:43,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2647 states. [2021-04-15 02:20:43,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2647 to 2452. [2021-04-15 02:20:43,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 3.025703794369645) internal successors, (7416), 2451 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:43,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 7416 transitions. [2021-04-15 02:20:43,860 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 7416 transitions. Word has length 20 [2021-04-15 02:20:43,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:43,860 INFO L480 AbstractCegarLoop]: Abstraction has 2452 states and 7416 transitions. [2021-04-15 02:20:43,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:43,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 7416 transitions. [2021-04-15 02:20:43,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:43,863 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:43,863 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:44,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:44,064 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:44,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:44,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1250996055, now seen corresponding path program 91 times [2021-04-15 02:20:44,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:44,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046657105] [2021-04-15 02:20:44,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:44,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:44,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046657105] [2021-04-15 02:20:44,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909274661] [2021-04-15 02:20:44,155 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:20:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:44,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:44,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:20:44,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:44,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-04-15 02:20:44,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311490225] [2021-04-15 02:20:44,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:44,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:44,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:44,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:44,219 INFO L87 Difference]: Start difference. First operand 2452 states and 7416 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 02:20:44,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:44,354 INFO L93 Difference]: Finished difference Result 2499 states and 7508 transitions. [2021-04-15 02:20:44,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:20:44,354 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 20 [2021-04-15 02:20:44,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:44,358 INFO L225 Difference]: With dead ends: 2499 [2021-04-15 02:20:44,359 INFO L226 Difference]: Without dead ends: 2498 [2021-04-15 02:20:44,359 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:20:44,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-04-15 02:20:44,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2452. [2021-04-15 02:20:44,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 3.0244798041615666) internal successors, (7413), 2451 states have internal predecessors, (7413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:44,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 7413 transitions. [2021-04-15 02:20:44,399 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 7413 transitions. Word has length 20 [2021-04-15 02:20:44,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:44,399 INFO L480 AbstractCegarLoop]: Abstraction has 2452 states and 7413 transitions. [2021-04-15 02:20:44,399 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 02:20:44,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 7413 transitions. [2021-04-15 02:20:44,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:44,405 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:44,405 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:44,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:44,626 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:44,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:44,626 INFO L82 PathProgramCache]: Analyzing trace with hash 412854133, now seen corresponding path program 92 times [2021-04-15 02:20:44,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:44,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109290307] [2021-04-15 02:20:44,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:20:44,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109290307] [2021-04-15 02:20:44,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106578647] [2021-04-15 02:20:44,682 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 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 02:20:44,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:44,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:44,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:44,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:20:44,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:44,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-04-15 02:20:44,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26416592] [2021-04-15 02:20:44,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:20:44,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:44,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:20:44,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:44,753 INFO L87 Difference]: Start difference. First operand 2452 states and 7413 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 02:20:44,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:44,861 INFO L93 Difference]: Finished difference Result 2670 states and 7781 transitions. [2021-04-15 02:20:44,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:20:44,861 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 20 [2021-04-15 02:20:44,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:44,866 INFO L225 Difference]: With dead ends: 2670 [2021-04-15 02:20:44,866 INFO L226 Difference]: Without dead ends: 2670 [2021-04-15 02:20:44,866 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:44,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2670 states. [2021-04-15 02:20:44,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2670 to 2472. [2021-04-15 02:20:44,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 3.0145690004046943) internal successors, (7449), 2471 states have internal predecessors, (7449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:44,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7449 transitions. [2021-04-15 02:20:44,912 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7449 transitions. Word has length 20 [2021-04-15 02:20:44,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:44,913 INFO L480 AbstractCegarLoop]: Abstraction has 2472 states and 7449 transitions. [2021-04-15 02:20:44,913 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 02:20:44,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7449 transitions. [2021-04-15 02:20:44,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:44,916 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:44,916 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:45,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:45,139 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:45,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:45,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1063359831, now seen corresponding path program 93 times [2021-04-15 02:20:45,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:45,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93218485] [2021-04-15 02:20:45,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:45,209 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:45,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93218485] [2021-04-15 02:20:45,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616876485] [2021-04-15 02:20:45,210 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 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 02:20:45,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:20:45,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:45,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:20:45,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:45,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:45,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:20:45,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303731383] [2021-04-15 02:20:45,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:45,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:45,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:45,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:45,281 INFO L87 Difference]: Start difference. First operand 2472 states and 7449 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 02:20:45,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:45,473 INFO L93 Difference]: Finished difference Result 2616 states and 7646 transitions. [2021-04-15 02:20:45,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:20:45,474 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 02:20:45,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:45,477 INFO L225 Difference]: With dead ends: 2616 [2021-04-15 02:20:45,478 INFO L226 Difference]: Without dead ends: 2608 [2021-04-15 02:20:45,478 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:20:45,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-04-15 02:20:45,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 2441. [2021-04-15 02:20:45,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2440 states have (on average 3.018032786885246) internal successors, (7364), 2440 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:45,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 7364 transitions. [2021-04-15 02:20:45,524 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 7364 transitions. Word has length 20 [2021-04-15 02:20:45,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:45,524 INFO L480 AbstractCegarLoop]: Abstraction has 2441 states and 7364 transitions. [2021-04-15 02:20:45,524 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 02:20:45,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 7364 transitions. [2021-04-15 02:20:45,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:45,527 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:45,527 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:45,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:45,741 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:45,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:45,741 INFO L82 PathProgramCache]: Analyzing trace with hash -9725549, now seen corresponding path program 94 times [2021-04-15 02:20:45,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:45,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19130541] [2021-04-15 02:20:45,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:45,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19130541] [2021-04-15 02:20:45,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933103156] [2021-04-15 02:20:45,824 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 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 02:20:45,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:45,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:45,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:45,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:45,892 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:20:45,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:45,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-04-15 02:20:45,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014511986] [2021-04-15 02:20:45,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:45,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:45,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:45,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:45,893 INFO L87 Difference]: Start difference. First operand 2441 states and 7364 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 02:20:46,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:46,057 INFO L93 Difference]: Finished difference Result 2536 states and 7516 transitions. [2021-04-15 02:20:46,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:20:46,058 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 20 [2021-04-15 02:20:46,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:46,061 INFO L225 Difference]: With dead ends: 2536 [2021-04-15 02:20:46,061 INFO L226 Difference]: Without dead ends: 2531 [2021-04-15 02:20:46,061 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 137.0ms TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:20:46,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2021-04-15 02:20:46,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 2441. [2021-04-15 02:20:46,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2440 states have (on average 3.015573770491803) internal successors, (7358), 2440 states have internal predecessors, (7358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:46,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 7358 transitions. [2021-04-15 02:20:46,089 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 7358 transitions. Word has length 20 [2021-04-15 02:20:46,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:46,089 INFO L480 AbstractCegarLoop]: Abstraction has 2441 states and 7358 transitions. [2021-04-15 02:20:46,089 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 02:20:46,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 7358 transitions. [2021-04-15 02:20:46,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:46,091 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:46,091 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:46,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-04-15 02:20:46,291 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:46,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:46,292 INFO L82 PathProgramCache]: Analyzing trace with hash -856557433, now seen corresponding path program 95 times [2021-04-15 02:20:46,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:46,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287283428] [2021-04-15 02:20:46,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:20:46,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287283428] [2021-04-15 02:20:46,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465481677] [2021-04-15 02:20:46,335 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 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 02:20:46,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:20:46,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:46,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:46,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:20:46,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:46,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-04-15 02:20:46,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861509171] [2021-04-15 02:20:46,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:20:46,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:46,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:20:46,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:46,414 INFO L87 Difference]: Start difference. First operand 2441 states and 7358 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 02:20:46,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:46,494 INFO L93 Difference]: Finished difference Result 2646 states and 7683 transitions. [2021-04-15 02:20:46,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:20:46,495 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 20 [2021-04-15 02:20:46,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:46,497 INFO L225 Difference]: With dead ends: 2646 [2021-04-15 02:20:46,497 INFO L226 Difference]: Without dead ends: 2644 [2021-04-15 02:20:46,497 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:20:46,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2021-04-15 02:20:46,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 2425. [2021-04-15 02:20:46,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 3.007838283828383) internal successors, (7291), 2424 states have internal predecessors, (7291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:46,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7291 transitions. [2021-04-15 02:20:46,523 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7291 transitions. Word has length 20 [2021-04-15 02:20:46,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:46,523 INFO L480 AbstractCegarLoop]: Abstraction has 2425 states and 7291 transitions. [2021-04-15 02:20:46,523 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 02:20:46,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7291 transitions. [2021-04-15 02:20:46,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:46,525 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:46,525 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:46,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-04-15 02:20:46,725 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:46,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:46,726 INFO L82 PathProgramCache]: Analyzing trace with hash -206051735, now seen corresponding path program 96 times [2021-04-15 02:20:46,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:46,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775222293] [2021-04-15 02:20:46,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:46,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775222293] [2021-04-15 02:20:46,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710418912] [2021-04-15 02:20:46,789 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:20:46,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:20:46,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:46,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:46,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:20:46,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:46,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-04-15 02:20:46,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547872423] [2021-04-15 02:20:46,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:46,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:46,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:46,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:46,866 INFO L87 Difference]: Start difference. First operand 2425 states and 7291 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 02:20:47,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:47,011 INFO L93 Difference]: Finished difference Result 2573 states and 7502 transitions. [2021-04-15 02:20:47,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:20:47,011 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 20 [2021-04-15 02:20:47,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:47,015 INFO L225 Difference]: With dead ends: 2573 [2021-04-15 02:20:47,015 INFO L226 Difference]: Without dead ends: 2568 [2021-04-15 02:20:47,015 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:20:47,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-04-15 02:20:47,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2418. [2021-04-15 02:20:47,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 3.00330988829127) internal successors, (7259), 2417 states have internal predecessors, (7259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:47,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7259 transitions. [2021-04-15 02:20:47,070 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7259 transitions. Word has length 20 [2021-04-15 02:20:47,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:47,071 INFO L480 AbstractCegarLoop]: Abstraction has 2418 states and 7259 transitions. [2021-04-15 02:20:47,071 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 02:20:47,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7259 transitions. [2021-04-15 02:20:47,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:47,073 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:47,073 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:47,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-04-15 02:20:47,296 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:47,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:47,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1279137115, now seen corresponding path program 97 times [2021-04-15 02:20:47,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:47,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693304640] [2021-04-15 02:20:47,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:47,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693304640] [2021-04-15 02:20:47,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874896685] [2021-04-15 02:20:47,357 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 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 02:20:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:47,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:47,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:47,413 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:20:47,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:47,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-04-15 02:20:47,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932712066] [2021-04-15 02:20:47,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:47,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:47,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:47,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:47,414 INFO L87 Difference]: Start difference. First operand 2418 states and 7259 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 02:20:47,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:47,543 INFO L93 Difference]: Finished difference Result 2568 states and 7475 transitions. [2021-04-15 02:20:47,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:20:47,544 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 20 [2021-04-15 02:20:47,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:47,546 INFO L225 Difference]: With dead ends: 2568 [2021-04-15 02:20:47,546 INFO L226 Difference]: Without dead ends: 2563 [2021-04-15 02:20:47,546 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:20:47,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-04-15 02:20:47,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 2418. [2021-04-15 02:20:47,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.9975175837815473) internal successors, (7245), 2417 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:47,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7245 transitions. [2021-04-15 02:20:47,577 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7245 transitions. Word has length 20 [2021-04-15 02:20:47,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:47,577 INFO L480 AbstractCegarLoop]: Abstraction has 2418 states and 7245 transitions. [2021-04-15 02:20:47,577 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 02:20:47,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7245 transitions. [2021-04-15 02:20:47,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:47,579 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:47,579 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:47,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable477,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:47,801 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:47,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:47,801 INFO L82 PathProgramCache]: Analyzing trace with hash -185045527, now seen corresponding path program 98 times [2021-04-15 02:20:47,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:47,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472039343] [2021-04-15 02:20:47,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:47,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472039343] [2021-04-15 02:20:47,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486168695] [2021-04-15 02:20:47,873 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 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 02:20:47,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:47,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:47,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:47,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:20:47,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:47,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-04-15 02:20:47,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179114478] [2021-04-15 02:20:47,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:47,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:47,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:47,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:47,930 INFO L87 Difference]: Start difference. First operand 2418 states and 7245 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 02:20:48,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:48,048 INFO L93 Difference]: Finished difference Result 2556 states and 7520 transitions. [2021-04-15 02:20:48,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:20:48,049 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 20 [2021-04-15 02:20:48,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:48,052 INFO L225 Difference]: With dead ends: 2556 [2021-04-15 02:20:48,052 INFO L226 Difference]: Without dead ends: 2553 [2021-04-15 02:20:48,052 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:20:48,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-04-15 02:20:48,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2418. [2021-04-15 02:20:48,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.99669011170873) internal successors, (7243), 2417 states have internal predecessors, (7243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:48,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7243 transitions. [2021-04-15 02:20:48,080 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7243 transitions. Word has length 20 [2021-04-15 02:20:48,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:48,080 INFO L480 AbstractCegarLoop]: Abstraction has 2418 states and 7243 transitions. [2021-04-15 02:20:48,080 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 02:20:48,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7243 transitions. [2021-04-15 02:20:48,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:48,082 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:48,082 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:48,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-04-15 02:20:48,282 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:48,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:48,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1553610315, now seen corresponding path program 99 times [2021-04-15 02:20:48,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:48,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508899246] [2021-04-15 02:20:48,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:20:48,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508899246] [2021-04-15 02:20:48,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141950282] [2021-04-15 02:20:48,328 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 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 02:20:48,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:20:48,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:48,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:20:48,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:20:48,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:48,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:20:48,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124597580] [2021-04-15 02:20:48,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:20:48,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:48,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:20:48,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:20:48,395 INFO L87 Difference]: Start difference. First operand 2418 states and 7243 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 02:20:48,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:48,454 INFO L93 Difference]: Finished difference Result 2583 states and 7523 transitions. [2021-04-15 02:20:48,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:20:48,455 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 20 [2021-04-15 02:20:48,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:48,458 INFO L225 Difference]: With dead ends: 2583 [2021-04-15 02:20:48,458 INFO L226 Difference]: Without dead ends: 2581 [2021-04-15 02:20:48,458 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:48,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2581 states. [2021-04-15 02:20:48,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2581 to 2419. [2021-04-15 02:20:48,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 2418 states have (on average 2.9971050454921424) internal successors, (7247), 2418 states have internal predecessors, (7247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:48,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 7247 transitions. [2021-04-15 02:20:48,486 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 7247 transitions. Word has length 20 [2021-04-15 02:20:48,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:48,486 INFO L480 AbstractCegarLoop]: Abstraction has 2419 states and 7247 transitions. [2021-04-15 02:20:48,486 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 02:20:48,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 7247 transitions. [2021-04-15 02:20:48,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:48,488 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:48,488 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:48,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:48,689 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:48,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:48,689 INFO L82 PathProgramCache]: Analyzing trace with hash 191844375, now seen corresponding path program 100 times [2021-04-15 02:20:48,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:48,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134319958] [2021-04-15 02:20:48,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:48,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134319958] [2021-04-15 02:20:48,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922253484] [2021-04-15 02:20:48,747 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 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 02:20:48,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:48,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:48,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:20:48,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:20:48,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:48,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-04-15 02:20:48,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384636084] [2021-04-15 02:20:48,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:20:48,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:48,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:20:48,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:48,804 INFO L87 Difference]: Start difference. First operand 2419 states and 7247 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 02:20:48,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:48,864 INFO L93 Difference]: Finished difference Result 2556 states and 7442 transitions. [2021-04-15 02:20:48,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:20:48,865 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 02:20:48,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:48,867 INFO L225 Difference]: With dead ends: 2556 [2021-04-15 02:20:48,867 INFO L226 Difference]: Without dead ends: 2556 [2021-04-15 02:20:48,867 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:48,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-04-15 02:20:48,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2398. [2021-04-15 02:20:48,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2397 states have (on average 2.994993742177722) internal successors, (7179), 2397 states have internal predecessors, (7179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:48,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 7179 transitions. [2021-04-15 02:20:48,900 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 7179 transitions. Word has length 20 [2021-04-15 02:20:48,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:48,901 INFO L480 AbstractCegarLoop]: Abstraction has 2398 states and 7179 transitions. [2021-04-15 02:20:48,901 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 02:20:48,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 7179 transitions. [2021-04-15 02:20:48,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:48,903 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:48,903 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:49,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable480 [2021-04-15 02:20:49,117 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:49,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:49,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1902457683, now seen corresponding path program 101 times [2021-04-15 02:20:49,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:49,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134037627] [2021-04-15 02:20:49,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:49,166 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:49,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134037627] [2021-04-15 02:20:49,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456155466] [2021-04-15 02:20:49,166 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 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 02:20:49,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:20:49,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:49,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:49,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:20:49,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:49,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-04-15 02:20:49,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051977364] [2021-04-15 02:20:49,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:49,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:49,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:49,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:49,225 INFO L87 Difference]: Start difference. First operand 2398 states and 7179 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 02:20:49,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:49,290 INFO L93 Difference]: Finished difference Result 2533 states and 7366 transitions. [2021-04-15 02:20:49,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:20:49,290 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 20 [2021-04-15 02:20:49,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:49,292 INFO L225 Difference]: With dead ends: 2533 [2021-04-15 02:20:49,292 INFO L226 Difference]: Without dead ends: 2533 [2021-04-15 02:20:49,293 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:20:49,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-04-15 02:20:49,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2394. [2021-04-15 02:20:49,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2394 states, 2393 states have (on average 2.990388633514417) internal successors, (7156), 2393 states have internal predecessors, (7156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:49,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 7156 transitions. [2021-04-15 02:20:49,315 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 7156 transitions. Word has length 20 [2021-04-15 02:20:49,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:49,315 INFO L480 AbstractCegarLoop]: Abstraction has 2394 states and 7156 transitions. [2021-04-15 02:20:49,315 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 02:20:49,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 7156 transitions. [2021-04-15 02:20:49,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:49,317 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:49,317 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:49,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:49,518 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:49,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:49,518 INFO L82 PathProgramCache]: Analyzing trace with hash -903104617, now seen corresponding path program 102 times [2021-04-15 02:20:49,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:49,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611038189] [2021-04-15 02:20:49,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:49,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611038189] [2021-04-15 02:20:49,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661052419] [2021-04-15 02:20:49,590 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 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 02:20:49,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:20:49,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:49,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:49,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:20:49,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:49,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-04-15 02:20:49,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3948547] [2021-04-15 02:20:49,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:49,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:49,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:49,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:49,662 INFO L87 Difference]: Start difference. First operand 2394 states and 7156 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 02:20:49,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:49,787 INFO L93 Difference]: Finished difference Result 2537 states and 7365 transitions. [2021-04-15 02:20:49,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:20:49,787 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 20 [2021-04-15 02:20:49,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:49,790 INFO L225 Difference]: With dead ends: 2537 [2021-04-15 02:20:49,790 INFO L226 Difference]: Without dead ends: 2534 [2021-04-15 02:20:49,791 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:20:49,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-04-15 02:20:49,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2390. [2021-04-15 02:20:49,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.9824194223524487) internal successors, (7125), 2389 states have internal predecessors, (7125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:49,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7125 transitions. [2021-04-15 02:20:49,816 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7125 transitions. Word has length 20 [2021-04-15 02:20:49,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:49,816 INFO L480 AbstractCegarLoop]: Abstraction has 2390 states and 7125 transitions. [2021-04-15 02:20:49,816 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 02:20:49,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7125 transitions. [2021-04-15 02:20:49,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:49,818 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:49,818 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:50,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:50,019 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:50,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:50,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1976189997, now seen corresponding path program 103 times [2021-04-15 02:20:50,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:50,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114929724] [2021-04-15 02:20:50,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:50,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114929724] [2021-04-15 02:20:50,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305512294] [2021-04-15 02:20:50,081 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 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 02:20:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:50,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:50,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:50,128 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:20:50,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:50,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-04-15 02:20:50,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283673255] [2021-04-15 02:20:50,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:50,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:50,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:50,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:50,129 INFO L87 Difference]: Start difference. First operand 2390 states and 7125 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 02:20:50,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:50,283 INFO L93 Difference]: Finished difference Result 2538 states and 7340 transitions. [2021-04-15 02:20:50,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:20:50,283 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 20 [2021-04-15 02:20:50,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:50,285 INFO L225 Difference]: With dead ends: 2538 [2021-04-15 02:20:50,286 INFO L226 Difference]: Without dead ends: 2533 [2021-04-15 02:20:50,286 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:20:50,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-04-15 02:20:50,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2390. [2021-04-15 02:20:50,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.973629133528673) internal successors, (7104), 2389 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:50,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7104 transitions. [2021-04-15 02:20:50,313 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7104 transitions. Word has length 20 [2021-04-15 02:20:50,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:50,313 INFO L480 AbstractCegarLoop]: Abstraction has 2390 states and 7104 transitions. [2021-04-15 02:20:50,313 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 02:20:50,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7104 transitions. [2021-04-15 02:20:50,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:50,315 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:50,315 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:50,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable483 [2021-04-15 02:20:50,529 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:50,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:50,529 INFO L82 PathProgramCache]: Analyzing trace with hash -882098409, now seen corresponding path program 104 times [2021-04-15 02:20:50,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:50,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368210748] [2021-04-15 02:20:50,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:50,613 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:50,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368210748] [2021-04-15 02:20:50,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754256838] [2021-04-15 02:20:50,613 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:20:50,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:50,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:50,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:50,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:20:50,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:50,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-04-15 02:20:50,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251657568] [2021-04-15 02:20:50,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:50,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:50,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:50,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:50,675 INFO L87 Difference]: Start difference. First operand 2390 states and 7104 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 02:20:50,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:50,808 INFO L93 Difference]: Finished difference Result 2545 states and 7407 transitions. [2021-04-15 02:20:50,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:20:50,808 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 20 [2021-04-15 02:20:50,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:50,811 INFO L225 Difference]: With dead ends: 2545 [2021-04-15 02:20:50,811 INFO L226 Difference]: Without dead ends: 2542 [2021-04-15 02:20:50,812 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:20:50,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-04-15 02:20:50,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 2390. [2021-04-15 02:20:50,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.9732105483465885) internal successors, (7103), 2389 states have internal predecessors, (7103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:50,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7103 transitions. [2021-04-15 02:20:50,841 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7103 transitions. Word has length 20 [2021-04-15 02:20:50,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:50,841 INFO L480 AbstractCegarLoop]: Abstraction has 2390 states and 7103 transitions. [2021-04-15 02:20:50,841 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 02:20:50,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7103 transitions. [2021-04-15 02:20:50,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:50,843 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:50,843 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:51,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:51,044 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:51,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:51,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1324997549, now seen corresponding path program 105 times [2021-04-15 02:20:51,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:51,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786084817] [2021-04-15 02:20:51,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:51,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786084817] [2021-04-15 02:20:51,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183625748] [2021-04-15 02:20:51,117 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 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 02:20:51,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:20:51,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:51,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:20:51,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:51,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:51,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:20:51,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888143413] [2021-04-15 02:20:51,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:51,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:51,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:51,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:51,187 INFO L87 Difference]: Start difference. First operand 2390 states and 7103 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 02:20:51,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:51,316 INFO L93 Difference]: Finished difference Result 2536 states and 7394 transitions. [2021-04-15 02:20:51,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:20:51,316 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 02:20:51,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:51,319 INFO L225 Difference]: With dead ends: 2536 [2021-04-15 02:20:51,319 INFO L226 Difference]: Without dead ends: 2532 [2021-04-15 02:20:51,320 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:20:51,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-04-15 02:20:51,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2390. [2021-04-15 02:20:51,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.972791963164504) internal successors, (7102), 2389 states have internal predecessors, (7102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:51,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7102 transitions. [2021-04-15 02:20:51,346 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7102 transitions. Word has length 20 [2021-04-15 02:20:51,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:51,346 INFO L480 AbstractCegarLoop]: Abstraction has 2390 states and 7102 transitions. [2021-04-15 02:20:51,346 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 02:20:51,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7102 transitions. [2021-04-15 02:20:51,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:51,348 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:51,348 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:51,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable485,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:51,549 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:51,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:51,549 INFO L82 PathProgramCache]: Analyzing trace with hash 774024681, now seen corresponding path program 106 times [2021-04-15 02:20:51,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:51,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068525105] [2021-04-15 02:20:51,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:51,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068525105] [2021-04-15 02:20:51,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290559834] [2021-04-15 02:20:51,601 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 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 02:20:51,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:51,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:51,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:20:51,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:20:51,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:51,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:20:51,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015252983] [2021-04-15 02:20:51,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:20:51,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:51,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:20:51,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:51,667 INFO L87 Difference]: Start difference. First operand 2390 states and 7102 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 02:20:51,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:51,778 INFO L93 Difference]: Finished difference Result 2507 states and 7304 transitions. [2021-04-15 02:20:51,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:20:51,779 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 20 [2021-04-15 02:20:51,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:51,781 INFO L225 Difference]: With dead ends: 2507 [2021-04-15 02:20:51,781 INFO L226 Difference]: Without dead ends: 2507 [2021-04-15 02:20:51,781 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:20:51,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-04-15 02:20:51,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2391. [2021-04-15 02:20:51,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.9728033472803346) internal successors, (7105), 2390 states have internal predecessors, (7105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:51,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 7105 transitions. [2021-04-15 02:20:51,807 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 7105 transitions. Word has length 20 [2021-04-15 02:20:51,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:51,807 INFO L480 AbstractCegarLoop]: Abstraction has 2391 states and 7105 transitions. [2021-04-15 02:20:51,807 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 02:20:51,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 7105 transitions. [2021-04-15 02:20:51,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:51,810 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:51,810 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:52,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-04-15 02:20:52,010 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:52,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:52,011 INFO L82 PathProgramCache]: Analyzing trace with hash 888022761, now seen corresponding path program 107 times [2021-04-15 02:20:52,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:52,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681192057] [2021-04-15 02:20:52,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:52,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681192057] [2021-04-15 02:20:52,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157451953] [2021-04-15 02:20:52,079 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 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 02:20:52,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:20:52,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:52,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:20:52,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:52,152 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:52,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:52,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:20:52,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580023560] [2021-04-15 02:20:52,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:52,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:52,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:52,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:52,153 INFO L87 Difference]: Start difference. First operand 2391 states and 7105 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 02:20:52,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:52,272 INFO L93 Difference]: Finished difference Result 2530 states and 7380 transitions. [2021-04-15 02:20:52,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:20:52,273 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 20 [2021-04-15 02:20:52,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:52,275 INFO L225 Difference]: With dead ends: 2530 [2021-04-15 02:20:52,275 INFO L226 Difference]: Without dead ends: 2527 [2021-04-15 02:20:52,275 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:20:52,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2021-04-15 02:20:52,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 2391. [2021-04-15 02:20:52,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.971548117154812) internal successors, (7102), 2390 states have internal predecessors, (7102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:52,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 7102 transitions. [2021-04-15 02:20:52,303 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 7102 transitions. Word has length 20 [2021-04-15 02:20:52,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:52,303 INFO L480 AbstractCegarLoop]: Abstraction has 2391 states and 7102 transitions. [2021-04-15 02:20:52,303 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 02:20:52,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 7102 transitions. [2021-04-15 02:20:52,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:52,305 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:52,306 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:52,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-04-15 02:20:52,527 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:52,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:52,528 INFO L82 PathProgramCache]: Analyzing trace with hash -379434417, now seen corresponding path program 108 times [2021-04-15 02:20:52,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:52,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422955205] [2021-04-15 02:20:52,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:52,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:52,589 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:52,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422955205] [2021-04-15 02:20:52,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124290438] [2021-04-15 02:20:52,589 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 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 02:20:52,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:20:52,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:52,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:52,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:20:52,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:52,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-04-15 02:20:52,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048362035] [2021-04-15 02:20:52,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:52,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:52,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:52,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:52,657 INFO L87 Difference]: Start difference. First operand 2391 states and 7102 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 02:20:52,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:52,780 INFO L93 Difference]: Finished difference Result 2601 states and 7491 transitions. [2021-04-15 02:20:52,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:20:52,780 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 20 [2021-04-15 02:20:52,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:52,783 INFO L225 Difference]: With dead ends: 2601 [2021-04-15 02:20:52,783 INFO L226 Difference]: Without dead ends: 2598 [2021-04-15 02:20:52,783 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:20:52,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-04-15 02:20:52,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 2391. [2021-04-15 02:20:52,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.9673640167364015) internal successors, (7092), 2390 states have internal predecessors, (7092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:52,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 7092 transitions. [2021-04-15 02:20:52,805 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 7092 transitions. Word has length 20 [2021-04-15 02:20:52,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:52,805 INFO L480 AbstractCegarLoop]: Abstraction has 2391 states and 7092 transitions. [2021-04-15 02:20:52,805 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 02:20:52,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 7092 transitions. [2021-04-15 02:20:52,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:52,806 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:52,806 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:53,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-04-15 02:20:53,007 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:53,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:53,007 INFO L82 PathProgramCache]: Analyzing trace with hash -822333557, now seen corresponding path program 109 times [2021-04-15 02:20:53,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:53,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549174887] [2021-04-15 02:20:53,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:53,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549174887] [2021-04-15 02:20:53,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793108291] [2021-04-15 02:20:53,085 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:20:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:53,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:53,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:20:53,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:53,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-04-15 02:20:53,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190941312] [2021-04-15 02:20:53,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:53,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:53,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:53,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:53,149 INFO L87 Difference]: Start difference. First operand 2391 states and 7092 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 02:20:53,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:53,283 INFO L93 Difference]: Finished difference Result 2612 states and 7532 transitions. [2021-04-15 02:20:53,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:20:53,283 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 20 [2021-04-15 02:20:53,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:53,286 INFO L225 Difference]: With dead ends: 2612 [2021-04-15 02:20:53,286 INFO L226 Difference]: Without dead ends: 2604 [2021-04-15 02:20:53,286 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:20:53,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-04-15 02:20:53,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2396. [2021-04-15 02:20:53,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2396 states, 2395 states have (on average 2.9649269311064717) internal successors, (7101), 2395 states have internal predecessors, (7101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:53,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 7101 transitions. [2021-04-15 02:20:53,318 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 7101 transitions. Word has length 20 [2021-04-15 02:20:53,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:53,318 INFO L480 AbstractCegarLoop]: Abstraction has 2396 states and 7101 transitions. [2021-04-15 02:20:53,318 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 02:20:53,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 7101 transitions. [2021-04-15 02:20:53,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:53,319 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:53,319 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:53,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:53,520 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:53,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:53,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1687413177, now seen corresponding path program 110 times [2021-04-15 02:20:53,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:53,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275685383] [2021-04-15 02:20:53,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:53,570 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:53,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275685383] [2021-04-15 02:20:53,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989560444] [2021-04-15 02:20:53,570 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 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 02:20:53,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:53,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:53,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:53,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:53,624 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:20:53,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:53,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-04-15 02:20:53,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800433917] [2021-04-15 02:20:53,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:20:53,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:53,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:20:53,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:20:53,625 INFO L87 Difference]: Start difference. First operand 2396 states and 7101 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 02:20:53,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:53,693 INFO L93 Difference]: Finished difference Result 2604 states and 7451 transitions. [2021-04-15 02:20:53,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:20:53,693 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 20 [2021-04-15 02:20:53,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:53,695 INFO L225 Difference]: With dead ends: 2604 [2021-04-15 02:20:53,695 INFO L226 Difference]: Without dead ends: 2604 [2021-04-15 02:20:53,695 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:53,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-04-15 02:20:53,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2417. [2021-04-15 02:20:53,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.9639900662251657) internal successors, (7161), 2416 states have internal predecessors, (7161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:53,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7161 transitions. [2021-04-15 02:20:53,718 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7161 transitions. Word has length 20 [2021-04-15 02:20:53,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:53,719 INFO L480 AbstractCegarLoop]: Abstraction has 2417 states and 7161 transitions. [2021-04-15 02:20:53,719 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 02:20:53,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7161 transitions. [2021-04-15 02:20:53,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:53,721 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:53,721 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:53,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-04-15 02:20:53,937 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:53,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:53,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1036907479, now seen corresponding path program 111 times [2021-04-15 02:20:53,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:53,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835376586] [2021-04-15 02:20:53,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:54,004 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:54,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835376586] [2021-04-15 02:20:54,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12645156] [2021-04-15 02:20:54,005 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 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 02:20:54,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:20:54,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:54,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:20:54,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:54,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:54,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:20:54,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710178826] [2021-04-15 02:20:54,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:54,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:54,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:54,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:54,064 INFO L87 Difference]: Start difference. First operand 2417 states and 7161 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 02:20:54,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:54,191 INFO L93 Difference]: Finished difference Result 2566 states and 7378 transitions. [2021-04-15 02:20:54,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:20:54,192 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 02:20:54,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:54,195 INFO L225 Difference]: With dead ends: 2566 [2021-04-15 02:20:54,195 INFO L226 Difference]: Without dead ends: 2563 [2021-04-15 02:20:54,195 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:20:54,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-04-15 02:20:54,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 2417. [2021-04-15 02:20:54,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.9598509933774833) internal successors, (7151), 2416 states have internal predecessors, (7151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:54,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7151 transitions. [2021-04-15 02:20:54,222 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7151 transitions. Word has length 20 [2021-04-15 02:20:54,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:54,223 INFO L480 AbstractCegarLoop]: Abstraction has 2417 states and 7151 transitions. [2021-04-15 02:20:54,223 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 02:20:54,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7151 transitions. [2021-04-15 02:20:54,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:54,225 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:54,225 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:54,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:54,425 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:54,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:54,426 INFO L82 PathProgramCache]: Analyzing trace with hash -2109992859, now seen corresponding path program 112 times [2021-04-15 02:20:54,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:54,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178008180] [2021-04-15 02:20:54,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:54,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178008180] [2021-04-15 02:20:54,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373713954] [2021-04-15 02:20:54,490 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 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 02:20:54,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:54,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:54,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:54,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:20:54,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:54,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-04-15 02:20:54,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198288202] [2021-04-15 02:20:54,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:54,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:54,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:54,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:54,553 INFO L87 Difference]: Start difference. First operand 2417 states and 7151 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 02:20:54,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:54,702 INFO L93 Difference]: Finished difference Result 2572 states and 7375 transitions. [2021-04-15 02:20:54,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:20:54,702 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 20 [2021-04-15 02:20:54,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:54,705 INFO L225 Difference]: With dead ends: 2572 [2021-04-15 02:20:54,705 INFO L226 Difference]: Without dead ends: 2567 [2021-04-15 02:20:54,706 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:20:54,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2021-04-15 02:20:54,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2417. [2021-04-15 02:20:54,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.9536423841059603) internal successors, (7136), 2416 states have internal predecessors, (7136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:54,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7136 transitions. [2021-04-15 02:20:54,734 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7136 transitions. Word has length 20 [2021-04-15 02:20:54,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:54,734 INFO L480 AbstractCegarLoop]: Abstraction has 2417 states and 7136 transitions. [2021-04-15 02:20:54,735 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 02:20:54,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7136 transitions. [2021-04-15 02:20:54,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:54,752 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:54,752 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:54,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:54,952 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:54,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:54,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1015901271, now seen corresponding path program 113 times [2021-04-15 02:20:54,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:54,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718900621] [2021-04-15 02:20:54,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:55,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718900621] [2021-04-15 02:20:55,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382990525] [2021-04-15 02:20:55,019 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 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 02:20:55,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:20:55,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:55,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:20:55,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:55,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:55,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:20:55,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075352663] [2021-04-15 02:20:55,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:20:55,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:55,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:20:55,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:55,082 INFO L87 Difference]: Start difference. First operand 2417 states and 7136 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 02:20:55,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:55,247 INFO L93 Difference]: Finished difference Result 2577 states and 7366 transitions. [2021-04-15 02:20:55,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:20:55,247 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 02:20:55,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:55,250 INFO L225 Difference]: With dead ends: 2577 [2021-04-15 02:20:55,250 INFO L226 Difference]: Without dead ends: 2571 [2021-04-15 02:20:55,250 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 125.6ms TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:20:55,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-04-15 02:20:55,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2418. [2021-04-15 02:20:55,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.945800579230451) internal successors, (7120), 2417 states have internal predecessors, (7120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:55,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7120 transitions. [2021-04-15 02:20:55,280 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7120 transitions. Word has length 20 [2021-04-15 02:20:55,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:55,280 INFO L480 AbstractCegarLoop]: Abstraction has 2418 states and 7120 transitions. [2021-04-15 02:20:55,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 02:20:55,280 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7120 transitions. [2021-04-15 02:20:55,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:55,282 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:55,282 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:55,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:55,495 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:55,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:55,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1458800411, now seen corresponding path program 114 times [2021-04-15 02:20:55,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:55,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101438258] [2021-04-15 02:20:55,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:55,565 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:55,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101438258] [2021-04-15 02:20:55,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120887089] [2021-04-15 02:20:55,565 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:55,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:20:55,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:55,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:55,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:20:55,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:55,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-04-15 02:20:55,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621176599] [2021-04-15 02:20:55,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:20:55,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:55,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:20:55,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:55,627 INFO L87 Difference]: Start difference. First operand 2418 states and 7120 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 02:20:55,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:55,797 INFO L93 Difference]: Finished difference Result 2689 states and 7651 transitions. [2021-04-15 02:20:55,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:20:55,798 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 20 [2021-04-15 02:20:55,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:55,800 INFO L225 Difference]: With dead ends: 2689 [2021-04-15 02:20:55,800 INFO L226 Difference]: Without dead ends: 2681 [2021-04-15 02:20:55,800 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 148.1ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:20:55,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2021-04-15 02:20:55,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 2420. [2021-04-15 02:20:55,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2420 states, 2419 states have (on average 2.9450186027284) internal successors, (7124), 2419 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:55,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 7124 transitions. [2021-04-15 02:20:55,823 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 7124 transitions. Word has length 20 [2021-04-15 02:20:55,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:55,824 INFO L480 AbstractCegarLoop]: Abstraction has 2420 states and 7124 transitions. [2021-04-15 02:20:55,824 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 02:20:55,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 7124 transitions. [2021-04-15 02:20:55,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:55,825 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:55,826 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:56,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:56,047 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:56,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:56,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1991195433, now seen corresponding path program 115 times [2021-04-15 02:20:56,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:56,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739012325] [2021-04-15 02:20:56,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:56,118 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:56,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739012325] [2021-04-15 02:20:56,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62053285] [2021-04-15 02:20:56,119 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 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 02:20:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:56,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:56,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:20:56,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:56,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-04-15 02:20:56,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439685935] [2021-04-15 02:20:56,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:20:56,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:56,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:20:56,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:56,174 INFO L87 Difference]: Start difference. First operand 2420 states and 7124 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 02:20:56,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:56,321 INFO L93 Difference]: Finished difference Result 2675 states and 7629 transitions. [2021-04-15 02:20:56,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:20:56,321 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 20 [2021-04-15 02:20:56,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:56,324 INFO L225 Difference]: With dead ends: 2675 [2021-04-15 02:20:56,324 INFO L226 Difference]: Without dead ends: 2660 [2021-04-15 02:20:56,324 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 139.5ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:20:56,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-04-15 02:20:56,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2425. [2021-04-15 02:20:56,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 2.942656765676568) internal successors, (7133), 2424 states have internal predecessors, (7133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:56,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7133 transitions. [2021-04-15 02:20:56,373 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7133 transitions. Word has length 20 [2021-04-15 02:20:56,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:56,373 INFO L480 AbstractCegarLoop]: Abstraction has 2425 states and 7133 transitions. [2021-04-15 02:20:56,373 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 02:20:56,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7133 transitions. [2021-04-15 02:20:56,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:56,376 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:56,376 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:56,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:56,598 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:56,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:56,599 INFO L82 PathProgramCache]: Analyzing trace with hash -823260751, now seen corresponding path program 116 times [2021-04-15 02:20:56,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:56,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195739898] [2021-04-15 02:20:56,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:56,651 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:56,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195739898] [2021-04-15 02:20:56,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972883694] [2021-04-15 02:20:56,651 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 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 02:20:56,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:56,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:56,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:20:56,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:56,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:56,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:20:56,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662368982] [2021-04-15 02:20:56,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:56,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:56,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:56,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:56,708 INFO L87 Difference]: Start difference. First operand 2425 states and 7133 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 02:20:56,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:56,802 INFO L93 Difference]: Finished difference Result 2669 states and 7579 transitions. [2021-04-15 02:20:56,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:20:56,802 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 20 [2021-04-15 02:20:56,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:56,805 INFO L225 Difference]: With dead ends: 2669 [2021-04-15 02:20:56,805 INFO L226 Difference]: Without dead ends: 2669 [2021-04-15 02:20:56,805 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:20:56,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2669 states. [2021-04-15 02:20:56,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2669 to 2472. [2021-04-15 02:20:56,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.9405099150141645) internal successors, (7266), 2471 states have internal predecessors, (7266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:56,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7266 transitions. [2021-04-15 02:20:56,829 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7266 transitions. Word has length 20 [2021-04-15 02:20:56,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:56,830 INFO L480 AbstractCegarLoop]: Abstraction has 2472 states and 7266 transitions. [2021-04-15 02:20:56,830 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 02:20:56,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7266 transitions. [2021-04-15 02:20:56,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:56,831 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:56,831 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:57,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-04-15 02:20:57,033 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:57,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:57,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1875348307, now seen corresponding path program 117 times [2021-04-15 02:20:57,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:57,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125415185] [2021-04-15 02:20:57,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:57,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125415185] [2021-04-15 02:20:57,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221057387] [2021-04-15 02:20:57,106 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:20:57,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:20:57,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:57,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:20:57,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:57,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:57,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:20:57,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693781848] [2021-04-15 02:20:57,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:57,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:57,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:57,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:57,178 INFO L87 Difference]: Start difference. First operand 2472 states and 7266 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 02:20:57,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:57,290 INFO L93 Difference]: Finished difference Result 2639 states and 7604 transitions. [2021-04-15 02:20:57,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:20:57,291 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 02:20:57,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:57,293 INFO L225 Difference]: With dead ends: 2639 [2021-04-15 02:20:57,293 INFO L226 Difference]: Without dead ends: 2635 [2021-04-15 02:20:57,293 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:20:57,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-04-15 02:20:57,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2472. [2021-04-15 02:20:57,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.9384864427357344) internal successors, (7261), 2471 states have internal predecessors, (7261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:57,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7261 transitions. [2021-04-15 02:20:57,319 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7261 transitions. Word has length 20 [2021-04-15 02:20:57,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:57,319 INFO L480 AbstractCegarLoop]: Abstraction has 2472 states and 7261 transitions. [2021-04-15 02:20:57,319 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 02:20:57,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7261 transitions. [2021-04-15 02:20:57,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:57,321 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:57,321 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:57,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-04-15 02:20:57,522 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:57,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:57,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1238881453, now seen corresponding path program 118 times [2021-04-15 02:20:57,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:57,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594748424] [2021-04-15 02:20:57,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:57,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594748424] [2021-04-15 02:20:57,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165049761] [2021-04-15 02:20:57,591 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 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 02:20:57,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:57,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:57,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:57,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:20:57,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:57,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-04-15 02:20:57,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527558606] [2021-04-15 02:20:57,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:20:57,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:57,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:20:57,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:57,666 INFO L87 Difference]: Start difference. First operand 2472 states and 7261 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 02:20:57,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:57,828 INFO L93 Difference]: Finished difference Result 2718 states and 7731 transitions. [2021-04-15 02:20:57,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:20:57,829 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 20 [2021-04-15 02:20:57,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:57,831 INFO L225 Difference]: With dead ends: 2718 [2021-04-15 02:20:57,831 INFO L226 Difference]: Without dead ends: 2714 [2021-04-15 02:20:57,831 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:20:57,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-04-15 02:20:57,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 2472. [2021-04-15 02:20:57,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.9348441926345608) internal successors, (7252), 2471 states have internal predecessors, (7252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:57,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7252 transitions. [2021-04-15 02:20:57,876 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7252 transitions. Word has length 20 [2021-04-15 02:20:57,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:57,876 INFO L480 AbstractCegarLoop]: Abstraction has 2472 states and 7252 transitions. [2021-04-15 02:20:57,876 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 02:20:57,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7252 transitions. [2021-04-15 02:20:57,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:57,878 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:57,878 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:58,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-04-15 02:20:58,078 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:58,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:58,079 INFO L82 PathProgramCache]: Analyzing trace with hash 393910001, now seen corresponding path program 119 times [2021-04-15 02:20:58,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:58,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630871604] [2021-04-15 02:20:58,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:58,149 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:58,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630871604] [2021-04-15 02:20:58,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340692817] [2021-04-15 02:20:58,149 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 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 02:20:58,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:20:58,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:58,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:58,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:20:58,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:58,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-04-15 02:20:58,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99121883] [2021-04-15 02:20:58,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:20:58,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:58,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:20:58,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:20:58,209 INFO L87 Difference]: Start difference. First operand 2472 states and 7252 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 02:20:58,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:58,351 INFO L93 Difference]: Finished difference Result 2775 states and 7866 transitions. [2021-04-15 02:20:58,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:20:58,351 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 20 [2021-04-15 02:20:58,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:58,354 INFO L225 Difference]: With dead ends: 2775 [2021-04-15 02:20:58,354 INFO L226 Difference]: Without dead ends: 2760 [2021-04-15 02:20:58,355 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:20:58,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-04-15 02:20:58,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2486. [2021-04-15 02:20:58,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 2.9287726358148896) internal successors, (7278), 2485 states have internal predecessors, (7278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:58,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 7278 transitions. [2021-04-15 02:20:58,383 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 7278 transitions. Word has length 20 [2021-04-15 02:20:58,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:58,383 INFO L480 AbstractCegarLoop]: Abstraction has 2486 states and 7278 transitions. [2021-04-15 02:20:58,383 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 02:20:58,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 7278 transitions. [2021-04-15 02:20:58,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:58,385 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:58,385 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:58,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-04-15 02:20:58,585 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:58,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:58,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1540334603, now seen corresponding path program 120 times [2021-04-15 02:20:58,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:58,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372249830] [2021-04-15 02:20:58,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:58,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372249830] [2021-04-15 02:20:58,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505805149] [2021-04-15 02:20:58,637 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 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 02:20:58,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:20:58,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:58,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:58,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:20:58,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:58,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-04-15 02:20:58,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106711497] [2021-04-15 02:20:58,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:58,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:58,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:58,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:58,711 INFO L87 Difference]: Start difference. First operand 2486 states and 7278 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 02:20:58,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:58,801 INFO L93 Difference]: Finished difference Result 2905 states and 8228 transitions. [2021-04-15 02:20:58,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:20:58,801 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 20 [2021-04-15 02:20:58,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:58,804 INFO L225 Difference]: With dead ends: 2905 [2021-04-15 02:20:58,804 INFO L226 Difference]: Without dead ends: 2905 [2021-04-15 02:20:58,805 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:20:58,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2021-04-15 02:20:58,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 2666. [2021-04-15 02:20:58,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.9448405253283303) internal successors, (7848), 2665 states have internal predecessors, (7848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:58,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 7848 transitions. [2021-04-15 02:20:58,835 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 7848 transitions. Word has length 20 [2021-04-15 02:20:58,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:58,835 INFO L480 AbstractCegarLoop]: Abstraction has 2666 states and 7848 transitions. [2021-04-15 02:20:58,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 02:20:58,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 7848 transitions. [2021-04-15 02:20:58,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:58,837 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:58,837 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:59,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable500 [2021-04-15 02:20:59,038 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:59,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:59,038 INFO L82 PathProgramCache]: Analyzing trace with hash -889828905, now seen corresponding path program 121 times [2021-04-15 02:20:59,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:59,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762565946] [2021-04-15 02:20:59,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:59,095 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:59,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762565946] [2021-04-15 02:20:59,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503407831] [2021-04-15 02:20:59,095 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 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 02:20:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:59,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:59,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:20:59,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:59,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-04-15 02:20:59,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402499384] [2021-04-15 02:20:59,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:20:59,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:59,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:20:59,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:20:59,153 INFO L87 Difference]: Start difference. First operand 2666 states and 7848 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 02:20:59,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:59,290 INFO L93 Difference]: Finished difference Result 2846 states and 8143 transitions. [2021-04-15 02:20:59,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:20:59,291 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 20 [2021-04-15 02:20:59,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:59,294 INFO L225 Difference]: With dead ends: 2846 [2021-04-15 02:20:59,294 INFO L226 Difference]: Without dead ends: 2845 [2021-04-15 02:20:59,294 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:20:59,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2845 states. [2021-04-15 02:20:59,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2845 to 2666. [2021-04-15 02:20:59,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.94296435272045) internal successors, (7843), 2665 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:59,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 7843 transitions. [2021-04-15 02:20:59,337 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 7843 transitions. Word has length 20 [2021-04-15 02:20:59,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:59,337 INFO L480 AbstractCegarLoop]: Abstraction has 2666 states and 7843 transitions. [2021-04-15 02:20:59,338 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 02:20:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 7843 transitions. [2021-04-15 02:20:59,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:59,340 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:59,340 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:59,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable501,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:59,540 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:59,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:59,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1962914285, now seen corresponding path program 122 times [2021-04-15 02:20:59,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:59,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504341625] [2021-04-15 02:20:59,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:59,607 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:59,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504341625] [2021-04-15 02:20:59,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253651557] [2021-04-15 02:20:59,608 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 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 02:20:59,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:59,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:59,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:59,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 29 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:20:59,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:59,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-04-15 02:20:59,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446294818] [2021-04-15 02:20:59,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:59,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:59,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:59,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:59,676 INFO L87 Difference]: Start difference. First operand 2666 states and 7843 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 02:20:59,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:59,853 INFO L93 Difference]: Finished difference Result 2854 states and 8145 transitions. [2021-04-15 02:20:59,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:20:59,854 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 20 [2021-04-15 02:20:59,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:59,857 INFO L225 Difference]: With dead ends: 2854 [2021-04-15 02:20:59,857 INFO L226 Difference]: Without dead ends: 2849 [2021-04-15 02:20:59,857 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 146.3ms TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:20:59,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2021-04-15 02:20:59,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2687. [2021-04-15 02:20:59,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 2.9389426656738644) internal successors, (7894), 2686 states have internal predecessors, (7894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:59,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 7894 transitions. [2021-04-15 02:20:59,894 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 7894 transitions. Word has length 20 [2021-04-15 02:20:59,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:59,894 INFO L480 AbstractCegarLoop]: Abstraction has 2687 states and 7894 transitions. [2021-04-15 02:20:59,894 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 02:20:59,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 7894 transitions. [2021-04-15 02:20:59,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:20:59,897 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:59,897 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:00,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-04-15 02:21:00,113 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:00,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:00,113 INFO L82 PathProgramCache]: Analyzing trace with hash -868822697, now seen corresponding path program 123 times [2021-04-15 02:21:00,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:00,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605457541] [2021-04-15 02:21:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:00,178 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:00,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605457541] [2021-04-15 02:21:00,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226012194] [2021-04-15 02:21:00,179 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 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 02:21:00,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:21:00,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:00,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:21:00,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:00,235 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:21:00,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:00,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-04-15 02:21:00,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888973801] [2021-04-15 02:21:00,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:21:00,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:00,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:21:00,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:21:00,236 INFO L87 Difference]: Start difference. First operand 2687 states and 7894 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 02:21:00,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:00,361 INFO L93 Difference]: Finished difference Result 3212 states and 8981 transitions. [2021-04-15 02:21:00,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:21:00,361 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 20 [2021-04-15 02:21:00,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:00,364 INFO L225 Difference]: With dead ends: 3212 [2021-04-15 02:21:00,365 INFO L226 Difference]: Without dead ends: 3209 [2021-04-15 02:21:00,365 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:21:00,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3209 states. [2021-04-15 02:21:00,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3209 to 2687. [2021-04-15 02:21:00,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 2.937453462397617) internal successors, (7890), 2686 states have internal predecessors, (7890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:00,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 7890 transitions. [2021-04-15 02:21:00,392 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 7890 transitions. Word has length 20 [2021-04-15 02:21:00,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:00,392 INFO L480 AbstractCegarLoop]: Abstraction has 2687 states and 7890 transitions. [2021-04-15 02:21:00,392 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 02:21:00,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 7890 transitions. [2021-04-15 02:21:00,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:21:00,394 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:00,394 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:00,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-04-15 02:21:00,596 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:00,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:00,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1311721837, now seen corresponding path program 124 times [2021-04-15 02:21:00,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:00,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432609236] [2021-04-15 02:21:00,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:00,663 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:00,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432609236] [2021-04-15 02:21:00,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182576214] [2021-04-15 02:21:00,663 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:00,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:21:00,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:00,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:21:00,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:21:00,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:00,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-04-15 02:21:00,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743386130] [2021-04-15 02:21:00,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:21:00,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:00,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:21:00,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:00,721 INFO L87 Difference]: Start difference. First operand 2687 states and 7890 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 02:21:00,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:00,851 INFO L93 Difference]: Finished difference Result 3217 states and 8981 transitions. [2021-04-15 02:21:00,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:21:00,851 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 20 [2021-04-15 02:21:00,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:00,855 INFO L225 Difference]: With dead ends: 3217 [2021-04-15 02:21:00,855 INFO L226 Difference]: Without dead ends: 3209 [2021-04-15 02:21:00,855 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:21:00,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3209 states. [2021-04-15 02:21:00,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3209 to 2709. [2021-04-15 02:21:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 2.9309453471196454) internal successors, (7937), 2708 states have internal predecessors, (7937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:00,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 7937 transitions. [2021-04-15 02:21:00,883 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 7937 transitions. Word has length 20 [2021-04-15 02:21:00,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:00,883 INFO L480 AbstractCegarLoop]: Abstraction has 2709 states and 7937 transitions. [2021-04-15 02:21:00,883 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 02:21:00,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 7937 transitions. [2021-04-15 02:21:00,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:21:00,885 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:00,885 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:01,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable504 [2021-04-15 02:21:01,089 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:01,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:01,089 INFO L82 PathProgramCache]: Analyzing trace with hash 2138274007, now seen corresponding path program 125 times [2021-04-15 02:21:01,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:01,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169111415] [2021-04-15 02:21:01,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:01,171 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:01,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169111415] [2021-04-15 02:21:01,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170366784] [2021-04-15 02:21:01,172 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 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 02:21:01,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:21:01,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:01,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:21:01,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:01,245 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:21:01,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:01,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-04-15 02:21:01,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494568878] [2021-04-15 02:21:01,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:21:01,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:01,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:21:01,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:01,246 INFO L87 Difference]: Start difference. First operand 2709 states and 7937 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 02:21:01,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:01,374 INFO L93 Difference]: Finished difference Result 3000 states and 8519 transitions. [2021-04-15 02:21:01,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:21:01,376 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 20 [2021-04-15 02:21:01,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:01,379 INFO L225 Difference]: With dead ends: 3000 [2021-04-15 02:21:01,379 INFO L226 Difference]: Without dead ends: 2995 [2021-04-15 02:21:01,379 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 123.4ms TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:21:01,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-04-15 02:21:01,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 2709. [2021-04-15 02:21:01,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 2.930576070901034) internal successors, (7936), 2708 states have internal predecessors, (7936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:01,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 7936 transitions. [2021-04-15 02:21:01,409 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 7936 transitions. Word has length 20 [2021-04-15 02:21:01,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:01,410 INFO L480 AbstractCegarLoop]: Abstraction has 2709 states and 7936 transitions. [2021-04-15 02:21:01,410 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 02:21:01,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 7936 transitions. [2021-04-15 02:21:01,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:21:01,412 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:01,412 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:01,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:01,612 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:01,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:01,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1713962771, now seen corresponding path program 126 times [2021-04-15 02:21:01,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:01,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244391560] [2021-04-15 02:21:01,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:01,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244391560] [2021-04-15 02:21:01,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453393881] [2021-04-15 02:21:01,690 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 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 02:21:01,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:21:01,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:01,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:21:01,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:01,752 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:21:01,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:01,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-04-15 02:21:01,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432312882] [2021-04-15 02:21:01,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:21:01,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:01,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:21:01,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:01,753 INFO L87 Difference]: Start difference. First operand 2709 states and 7936 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 02:21:01,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:01,889 INFO L93 Difference]: Finished difference Result 2966 states and 8462 transitions. [2021-04-15 02:21:01,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:21:01,889 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 20 [2021-04-15 02:21:01,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:01,891 INFO L225 Difference]: With dead ends: 2966 [2021-04-15 02:21:01,891 INFO L226 Difference]: Without dead ends: 2960 [2021-04-15 02:21:01,892 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 152.3ms TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:21:01,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2021-04-15 02:21:01,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2709. [2021-04-15 02:21:01,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 2.9302067946824226) internal successors, (7935), 2708 states have internal predecessors, (7935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:01,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 7935 transitions. [2021-04-15 02:21:01,917 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 7935 transitions. Word has length 20 [2021-04-15 02:21:01,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:01,917 INFO L480 AbstractCegarLoop]: Abstraction has 2709 states and 7935 transitions. [2021-04-15 02:21:01,917 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 02:21:01,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 7935 transitions. [2021-04-15 02:21:01,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:21:01,919 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:01,919 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:02,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2021-04-15 02:21:02,121 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:02,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:02,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1200498409, now seen corresponding path program 127 times [2021-04-15 02:21:02,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:02,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641810717] [2021-04-15 02:21:02,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:02,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:02,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641810717] [2021-04-15 02:21:02,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470896066] [2021-04-15 02:21:02,188 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 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 02:21:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:02,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:21:02,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:02,260 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:02,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:02,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-04-15 02:21:02,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464825897] [2021-04-15 02:21:02,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:21:02,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:02,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:21:02,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:02,261 INFO L87 Difference]: Start difference. First operand 2709 states and 7935 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 02:21:02,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:02,389 INFO L93 Difference]: Finished difference Result 2994 states and 8494 transitions. [2021-04-15 02:21:02,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:21:02,390 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 20 [2021-04-15 02:21:02,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:02,393 INFO L225 Difference]: With dead ends: 2994 [2021-04-15 02:21:02,393 INFO L226 Difference]: Without dead ends: 2994 [2021-04-15 02:21:02,394 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:21:02,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2994 states. [2021-04-15 02:21:02,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2994 to 2744. [2021-04-15 02:21:02,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2743 states have (on average 2.930368209989063) internal successors, (8038), 2743 states have internal predecessors, (8038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:02,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 8038 transitions. [2021-04-15 02:21:02,426 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 8038 transitions. Word has length 20 [2021-04-15 02:21:02,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:02,426 INFO L480 AbstractCegarLoop]: Abstraction has 2744 states and 8038 transitions. [2021-04-15 02:21:02,426 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 02:21:02,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 8038 transitions. [2021-04-15 02:21:02,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:21:02,428 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:02,428 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:02,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-04-15 02:21:02,641 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:02,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:02,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1877298135, now seen corresponding path program 128 times [2021-04-15 02:21:02,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:02,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535623589] [2021-04-15 02:21:02,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:02,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535623589] [2021-04-15 02:21:02,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341060400] [2021-04-15 02:21:02,716 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 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 02:21:02,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:21:02,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:02,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:21:02,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:21:02,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:02,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2021-04-15 02:21:02,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071385814] [2021-04-15 02:21:02,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:02,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:02,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:02,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:02,783 INFO L87 Difference]: Start difference. First operand 2744 states and 8038 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 02:21:02,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:02,950 INFO L93 Difference]: Finished difference Result 2954 states and 8469 transitions. [2021-04-15 02:21:02,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:21:02,955 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 20 [2021-04-15 02:21:02,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:02,958 INFO L225 Difference]: With dead ends: 2954 [2021-04-15 02:21:02,958 INFO L226 Difference]: Without dead ends: 2949 [2021-04-15 02:21:02,959 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 156.6ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:21:02,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2949 states. [2021-04-15 02:21:02,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2949 to 2744. [2021-04-15 02:21:02,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2743 states have (on average 2.9292745169522423) internal successors, (8035), 2743 states have internal predecessors, (8035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:02,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 8035 transitions. [2021-04-15 02:21:02,987 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 8035 transitions. Word has length 20 [2021-04-15 02:21:02,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:02,988 INFO L480 AbstractCegarLoop]: Abstraction has 2744 states and 8035 transitions. [2021-04-15 02:21:02,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 02:21:02,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 8035 transitions. [2021-04-15 02:21:02,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:21:02,990 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:02,990 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:03,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:03,191 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:03,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:03,191 INFO L82 PathProgramCache]: Analyzing trace with hash -132934129, now seen corresponding path program 129 times [2021-04-15 02:21:03,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:03,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701736304] [2021-04-15 02:21:03,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:03,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701736304] [2021-04-15 02:21:03,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086490277] [2021-04-15 02:21:03,280 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:03,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:21:03,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:03,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:21:03,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:03,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:03,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-04-15 02:21:03,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442899258] [2021-04-15 02:21:03,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:03,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:03,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:03,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:03,355 INFO L87 Difference]: Start difference. First operand 2744 states and 8035 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:21:03,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:03,520 INFO L93 Difference]: Finished difference Result 3147 states and 8824 transitions. [2021-04-15 02:21:03,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:21:03,520 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 20 [2021-04-15 02:21:03,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:03,524 INFO L225 Difference]: With dead ends: 3147 [2021-04-15 02:21:03,524 INFO L226 Difference]: Without dead ends: 3132 [2021-04-15 02:21:03,524 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:21:03,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-04-15 02:21:03,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 2748. [2021-04-15 02:21:03,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 2747 states have (on average 2.9257371678194395) internal successors, (8037), 2747 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:03,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 8037 transitions. [2021-04-15 02:21:03,557 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 8037 transitions. Word has length 20 [2021-04-15 02:21:03,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:03,557 INFO L480 AbstractCegarLoop]: Abstraction has 2748 states and 8037 transitions. [2021-04-15 02:21:03,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:21:03,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 8037 transitions. [2021-04-15 02:21:03,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:21:03,560 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:03,560 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:03,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:03,761 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:03,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:03,761 INFO L82 PathProgramCache]: Analyzing trace with hash -557245365, now seen corresponding path program 130 times [2021-04-15 02:21:03,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:03,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395989025] [2021-04-15 02:21:03,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:03,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395989025] [2021-04-15 02:21:03,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526316912] [2021-04-15 02:21:03,841 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 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 02:21:03,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:21:03,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:03,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:21:03,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:03,907 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:21:03,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:03,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2021-04-15 02:21:03,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256349612] [2021-04-15 02:21:03,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:03,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:03,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:03,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:03,908 INFO L87 Difference]: Start difference. First operand 2748 states and 8037 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 02:21:04,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:04,052 INFO L93 Difference]: Finished difference Result 3023 states and 8605 transitions. [2021-04-15 02:21:04,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:21:04,052 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 20 [2021-04-15 02:21:04,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:04,055 INFO L225 Difference]: With dead ends: 3023 [2021-04-15 02:21:04,055 INFO L226 Difference]: Without dead ends: 3017 [2021-04-15 02:21:04,055 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 168.7ms TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:21:04,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2021-04-15 02:21:04,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 2748. [2021-04-15 02:21:04,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 2747 states have (on average 2.925373134328358) internal successors, (8036), 2747 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:04,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 8036 transitions. [2021-04-15 02:21:04,086 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 8036 transitions. Word has length 20 [2021-04-15 02:21:04,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:04,086 INFO L480 AbstractCegarLoop]: Abstraction has 2748 states and 8036 transitions. [2021-04-15 02:21:04,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 02:21:04,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 8036 transitions. [2021-04-15 02:21:04,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:21:04,088 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:04,088 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:04,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-04-15 02:21:04,289 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:04,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:04,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1275866105, now seen corresponding path program 131 times [2021-04-15 02:21:04,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:04,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983965807] [2021-04-15 02:21:04,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:04,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983965807] [2021-04-15 02:21:04,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150786356] [2021-04-15 02:21:04,360 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 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 02:21:04,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:21:04,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:04,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:21:04,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:21:04,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:04,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 15 [2021-04-15 02:21:04,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565957891] [2021-04-15 02:21:04,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:04,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:04,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:04,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:04,436 INFO L87 Difference]: Start difference. First operand 2748 states and 8036 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:04,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:04,534 INFO L93 Difference]: Finished difference Result 3263 states and 9284 transitions. [2021-04-15 02:21:04,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:21:04,534 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 02:21:04,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:04,538 INFO L225 Difference]: With dead ends: 3263 [2021-04-15 02:21:04,538 INFO L226 Difference]: Without dead ends: 3263 [2021-04-15 02:21:04,538 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:21:04,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3263 states. [2021-04-15 02:21:04,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3263 to 3010. [2021-04-15 02:21:04,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 2.9478231970754405) internal successors, (8870), 3009 states have internal predecessors, (8870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:04,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 8870 transitions. [2021-04-15 02:21:04,569 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 8870 transitions. Word has length 20 [2021-04-15 02:21:04,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:04,569 INFO L480 AbstractCegarLoop]: Abstraction has 3010 states and 8870 transitions. [2021-04-15 02:21:04,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:04,569 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 8870 transitions. [2021-04-15 02:21:04,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:21:04,571 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:04,571 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:04,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-04-15 02:21:04,772 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:04,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:04,786 INFO L82 PathProgramCache]: Analyzing trace with hash -625360407, now seen corresponding path program 132 times [2021-04-15 02:21:04,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:04,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004410979] [2021-04-15 02:21:04,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:04,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004410979] [2021-04-15 02:21:04,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644977862] [2021-04-15 02:21:04,854 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:04,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:21:04,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:04,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:21:04,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:04,927 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:21:04,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:04,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 14 [2021-04-15 02:21:04,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275947654] [2021-04-15 02:21:04,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:21:04,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:04,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:21:04,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:04,928 INFO L87 Difference]: Start difference. First operand 3010 states and 8870 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 02:21:05,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:05,055 INFO L93 Difference]: Finished difference Result 3211 states and 9205 transitions. [2021-04-15 02:21:05,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:21:05,056 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 20 [2021-04-15 02:21:05,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:05,059 INFO L225 Difference]: With dead ends: 3211 [2021-04-15 02:21:05,059 INFO L226 Difference]: Without dead ends: 3210 [2021-04-15 02:21:05,059 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:21:05,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2021-04-15 02:21:05,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 3010. [2021-04-15 02:21:05,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 2.94749086075108) internal successors, (8869), 3009 states have internal predecessors, (8869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:05,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 8869 transitions. [2021-04-15 02:21:05,088 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 8869 transitions. Word has length 20 [2021-04-15 02:21:05,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:05,088 INFO L480 AbstractCegarLoop]: Abstraction has 3010 states and 8869 transitions. [2021-04-15 02:21:05,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 02:21:05,089 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 8869 transitions. [2021-04-15 02:21:05,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:21:05,091 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:05,091 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:05,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-04-15 02:21:05,291 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:05,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:05,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1698445787, now seen corresponding path program 133 times [2021-04-15 02:21:05,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:05,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502226414] [2021-04-15 02:21:05,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:05,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502226414] [2021-04-15 02:21:05,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478025808] [2021-04-15 02:21:05,376 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 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 02:21:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:05,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:21:05,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:21:05,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:05,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-04-15 02:21:05,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701918799] [2021-04-15 02:21:05,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:05,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:05,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:05,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:05,442 INFO L87 Difference]: Start difference. First operand 3010 states and 8869 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 02:21:05,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:05,597 INFO L93 Difference]: Finished difference Result 3214 states and 9207 transitions. [2021-04-15 02:21:05,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:21:05,597 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 20 [2021-04-15 02:21:05,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:05,600 INFO L225 Difference]: With dead ends: 3214 [2021-04-15 02:21:05,600 INFO L226 Difference]: Without dead ends: 3211 [2021-04-15 02:21:05,601 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 147.3ms TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:05,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-04-15 02:21:05,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 3017. [2021-04-15 02:21:05,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9462864721485413) internal successors, (8886), 3016 states have internal predecessors, (8886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:05,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8886 transitions. [2021-04-15 02:21:05,632 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8886 transitions. Word has length 20 [2021-04-15 02:21:05,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:05,632 INFO L480 AbstractCegarLoop]: Abstraction has 3017 states and 8886 transitions. [2021-04-15 02:21:05,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 02:21:05,632 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8886 transitions. [2021-04-15 02:21:05,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:21:05,635 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:05,635 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:05,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:05,835 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:05,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:05,835 INFO L82 PathProgramCache]: Analyzing trace with hash -604354199, now seen corresponding path program 134 times [2021-04-15 02:21:05,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:05,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186611287] [2021-04-15 02:21:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:05,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186611287] [2021-04-15 02:21:05,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831723765] [2021-04-15 02:21:05,926 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 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 02:21:05,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:21:05,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:05,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:21:05,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:06,000 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:21:06,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:06,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-04-15 02:21:06,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416832751] [2021-04-15 02:21:06,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:06,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:06,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:06,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:06,001 INFO L87 Difference]: Start difference. First operand 3017 states and 8886 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 02:21:06,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:06,148 INFO L93 Difference]: Finished difference Result 3712 states and 10403 transitions. [2021-04-15 02:21:06,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:21:06,148 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 20 [2021-04-15 02:21:06,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:06,152 INFO L225 Difference]: With dead ends: 3712 [2021-04-15 02:21:06,152 INFO L226 Difference]: Without dead ends: 3709 [2021-04-15 02:21:06,153 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:06,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3709 states. [2021-04-15 02:21:06,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3709 to 3017. [2021-04-15 02:21:06,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9449602122015914) internal successors, (8882), 3016 states have internal predecessors, (8882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:06,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8882 transitions. [2021-04-15 02:21:06,204 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8882 transitions. Word has length 20 [2021-04-15 02:21:06,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:06,204 INFO L480 AbstractCegarLoop]: Abstraction has 3017 states and 8882 transitions. [2021-04-15 02:21:06,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 02:21:06,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8882 transitions. [2021-04-15 02:21:06,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:21:06,208 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:06,208 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:06,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-04-15 02:21:06,429 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:06,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:06,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1047253339, now seen corresponding path program 135 times [2021-04-15 02:21:06,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:06,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039670317] [2021-04-15 02:21:06,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:06,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:06,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039670317] [2021-04-15 02:21:06,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998072708] [2021-04-15 02:21:06,557 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 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 02:21:06,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:21:06,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:06,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:21:06,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:21:06,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:06,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-04-15 02:21:06,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424226495] [2021-04-15 02:21:06,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:06,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:06,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:06,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:06,630 INFO L87 Difference]: Start difference. First operand 3017 states and 8882 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 02:21:06,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:06,771 INFO L93 Difference]: Finished difference Result 3583 states and 10063 transitions. [2021-04-15 02:21:06,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:21:06,771 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 20 [2021-04-15 02:21:06,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:06,776 INFO L225 Difference]: With dead ends: 3583 [2021-04-15 02:21:06,776 INFO L226 Difference]: Without dead ends: 3579 [2021-04-15 02:21:06,776 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 194.9ms TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:06,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3579 states. [2021-04-15 02:21:06,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3579 to 3017. [2021-04-15 02:21:06,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.944297082228117) internal successors, (8880), 3016 states have internal predecessors, (8880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:06,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8880 transitions. [2021-04-15 02:21:06,814 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8880 transitions. Word has length 20 [2021-04-15 02:21:06,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:06,814 INFO L480 AbstractCegarLoop]: Abstraction has 3017 states and 8880 transitions. [2021-04-15 02:21:06,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 02:21:06,814 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8880 transitions. [2021-04-15 02:21:06,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:21:06,817 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:06,817 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:07,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:07,018 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:07,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:07,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1892224791, now seen corresponding path program 136 times [2021-04-15 02:21:07,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:07,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354111166] [2021-04-15 02:21:07,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:07,098 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:07,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354111166] [2021-04-15 02:21:07,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664275852] [2021-04-15 02:21:07,098 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 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 02:21:07,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:21:07,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:07,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:21:07,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:21:07,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:07,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 16 [2021-04-15 02:21:07,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661217131] [2021-04-15 02:21:07,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:21:07,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:07,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:21:07,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:21:07,184 INFO L87 Difference]: Start difference. First operand 3017 states and 8880 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 02:21:07,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:07,331 INFO L93 Difference]: Finished difference Result 3595 states and 10071 transitions. [2021-04-15 02:21:07,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:21:07,331 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 20 [2021-04-15 02:21:07,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:07,336 INFO L225 Difference]: With dead ends: 3595 [2021-04-15 02:21:07,337 INFO L226 Difference]: Without dead ends: 3580 [2021-04-15 02:21:07,337 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:21:07,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3580 states. [2021-04-15 02:21:07,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3580 to 3038. [2021-04-15 02:21:07,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 2.9400724399078038) internal successors, (8929), 3037 states have internal predecessors, (8929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:07,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 8929 transitions. [2021-04-15 02:21:07,376 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 8929 transitions. Word has length 20 [2021-04-15 02:21:07,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:07,377 INFO L480 AbstractCegarLoop]: Abstraction has 3038 states and 8929 transitions. [2021-04-15 02:21:07,377 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 02:21:07,377 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 8929 transitions. [2021-04-15 02:21:07,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:21:07,379 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:07,379 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:07,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable516 [2021-04-15 02:21:07,580 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:07,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:07,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1978431269, now seen corresponding path program 137 times [2021-04-15 02:21:07,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:07,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476068498] [2021-04-15 02:21:07,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:07,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476068498] [2021-04-15 02:21:07,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11895754] [2021-04-15 02:21:07,662 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 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 02:21:07,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:21:07,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:07,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:21:07,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:21:07,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:07,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 16 [2021-04-15 02:21:07,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506135080] [2021-04-15 02:21:07,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:21:07,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:07,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:21:07,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:21:07,742 INFO L87 Difference]: Start difference. First operand 3038 states and 8929 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 02:21:07,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:07,893 INFO L93 Difference]: Finished difference Result 3383 states and 9628 transitions. [2021-04-15 02:21:07,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:21:07,893 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 20 [2021-04-15 02:21:07,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:07,898 INFO L225 Difference]: With dead ends: 3383 [2021-04-15 02:21:07,898 INFO L226 Difference]: Without dead ends: 3377 [2021-04-15 02:21:07,898 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 171.9ms TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:21:07,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3377 states. [2021-04-15 02:21:07,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3377 to 3038. [2021-04-15 02:21:07,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 2.939743167599605) internal successors, (8928), 3037 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 02:21:07,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 8928 transitions. [2021-04-15 02:21:07,937 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 8928 transitions. Word has length 20 [2021-04-15 02:21:07,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:07,937 INFO L480 AbstractCegarLoop]: Abstraction has 3038 states and 8928 transitions. [2021-04-15 02:21:07,937 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 02:21:07,937 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 8928 transitions. [2021-04-15 02:21:07,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:21:07,939 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:07,940 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:08,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:08,140 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:08,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:08,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1709684841, now seen corresponding path program 138 times [2021-04-15 02:21:08,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:08,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455392408] [2021-04-15 02:21:08,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:08,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455392408] [2021-04-15 02:21:08,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140934129] [2021-04-15 02:21:08,244 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 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 02:21:08,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:21:08,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:08,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:21:08,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:21:08,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:08,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-04-15 02:21:08,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095334360] [2021-04-15 02:21:08,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:21:08,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:08,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:21:08,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:21:08,331 INFO L87 Difference]: Start difference. First operand 3038 states and 8928 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 02:21:08,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:08,477 INFO L93 Difference]: Finished difference Result 3346 states and 9565 transitions. [2021-04-15 02:21:08,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:21:08,477 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 20 [2021-04-15 02:21:08,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:08,480 INFO L225 Difference]: With dead ends: 3346 [2021-04-15 02:21:08,480 INFO L226 Difference]: Without dead ends: 3339 [2021-04-15 02:21:08,480 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:21:08,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2021-04-15 02:21:08,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3038. [2021-04-15 02:21:08,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 2.939413895291406) internal successors, (8927), 3037 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:08,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 8927 transitions. [2021-04-15 02:21:08,518 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 8927 transitions. Word has length 20 [2021-04-15 02:21:08,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:08,518 INFO L480 AbstractCegarLoop]: Abstraction has 3038 states and 8927 transitions. [2021-04-15 02:21:08,519 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 02:21:08,519 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 8927 transitions. [2021-04-15 02:21:08,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:21:08,521 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:08,521 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:08,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2021-04-15 02:21:08,721 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:08,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:08,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1876737230, now seen corresponding path program 139 times [2021-04-15 02:21:08,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:08,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616352100] [2021-04-15 02:21:08,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:08,786 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:08,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616352100] [2021-04-15 02:21:08,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73224718] [2021-04-15 02:21:08,786 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 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 02:21:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:08,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:21:08,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:09,149 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:21:09,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:21:09,151 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 43 treesize of output 319 [2021-04-15 02:21:10,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:21:10,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:21:10,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:21:10,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-04-15 02:21:10,950 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:10,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:10,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-04-15 02:21:10,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29131553] [2021-04-15 02:21:10,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:21:10,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:10,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:21:10,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:10,951 INFO L87 Difference]: Start difference. First operand 3038 states and 8927 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:11,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:11,200 INFO L93 Difference]: Finished difference Result 3126 states and 9098 transitions. [2021-04-15 02:21:11,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:21:11,201 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 02:21:11,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:11,205 INFO L225 Difference]: With dead ends: 3126 [2021-04-15 02:21:11,205 INFO L226 Difference]: Without dead ends: 3123 [2021-04-15 02:21:11,205 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 223.2ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:11,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-04-15 02:21:11,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 3077. [2021-04-15 02:21:11,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3077 states, 3076 states have (on average 2.935305591677503) internal successors, (9029), 3076 states have internal predecessors, (9029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:11,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3077 states to 3077 states and 9029 transitions. [2021-04-15 02:21:11,254 INFO L78 Accepts]: Start accepts. Automaton has 3077 states and 9029 transitions. Word has length 21 [2021-04-15 02:21:11,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:11,254 INFO L480 AbstractCegarLoop]: Abstraction has 3077 states and 9029 transitions. [2021-04-15 02:21:11,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:11,254 INFO L276 IsEmpty]: Start isEmpty. Operand 3077 states and 9029 transitions. [2021-04-15 02:21:11,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:21:11,257 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:11,257 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:11,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:11,458 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:11,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:11,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1748440654, now seen corresponding path program 140 times [2021-04-15 02:21:11,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:11,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446154360] [2021-04-15 02:21:11,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:11,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446154360] [2021-04-15 02:21:11,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326986537] [2021-04-15 02:21:11,541 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 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 02:21:11,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:21:11,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:11,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:21:11,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:11,931 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:21:11,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:21:11,932 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 43 treesize of output 319 [2021-04-15 02:21:14,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:21:14,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:21:14,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:21:14,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-04-15 02:21:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:14,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:14,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-04-15 02:21:14,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533427805] [2021-04-15 02:21:14,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:21:14,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:14,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:21:14,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:14,017 INFO L87 Difference]: Start difference. First operand 3077 states and 9029 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:14,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:14,235 INFO L93 Difference]: Finished difference Result 3204 states and 9307 transitions. [2021-04-15 02:21:14,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:21:14,235 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 02:21:14,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:14,239 INFO L225 Difference]: With dead ends: 3204 [2021-04-15 02:21:14,239 INFO L226 Difference]: Without dead ends: 3200 [2021-04-15 02:21:14,239 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 243.8ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:14,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3200 states. [2021-04-15 02:21:14,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3200 to 3145. [2021-04-15 02:21:14,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3145 states, 3144 states have (on average 2.931933842239186) internal successors, (9218), 3144 states have internal predecessors, (9218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:14,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 9218 transitions. [2021-04-15 02:21:14,269 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 9218 transitions. Word has length 21 [2021-04-15 02:21:14,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:14,269 INFO L480 AbstractCegarLoop]: Abstraction has 3145 states and 9218 transitions. [2021-04-15 02:21:14,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:14,269 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 9218 transitions. [2021-04-15 02:21:14,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:21:14,272 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:14,272 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:14,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1071 [2021-04-15 02:21:14,493 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:14,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:14,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1114512810, now seen corresponding path program 141 times [2021-04-15 02:21:14,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:14,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199603085] [2021-04-15 02:21:14,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:14,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199603085] [2021-04-15 02:21:14,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525766544] [2021-04-15 02:21:14,586 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 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 02:21:14,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:21:14,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:14,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:21:14,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:14,946 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:21:14,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:21:14,947 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 43 treesize of output 319 [2021-04-15 02:21:17,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:21:17,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:21:17,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:21:17,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-04-15 02:21:17,711 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:17,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:17,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-04-15 02:21:17,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431361634] [2021-04-15 02:21:17,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:21:17,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:17,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:21:17,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:17,728 INFO L87 Difference]: Start difference. First operand 3145 states and 9218 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:17,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:17,954 INFO L93 Difference]: Finished difference Result 3276 states and 9505 transitions. [2021-04-15 02:21:17,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:21:17,955 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 02:21:17,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:17,959 INFO L225 Difference]: With dead ends: 3276 [2021-04-15 02:21:17,959 INFO L226 Difference]: Without dead ends: 3272 [2021-04-15 02:21:17,959 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 250.6ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:17,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2021-04-15 02:21:17,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 3208. [2021-04-15 02:21:17,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3207 states have (on average 2.9307764265668848) internal successors, (9399), 3207 states have internal predecessors, (9399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:17,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 9399 transitions. [2021-04-15 02:21:17,995 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 9399 transitions. Word has length 21 [2021-04-15 02:21:17,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:17,995 INFO L480 AbstractCegarLoop]: Abstraction has 3208 states and 9399 transitions. [2021-04-15 02:21:17,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:17,995 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 9399 transitions. [2021-04-15 02:21:17,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:21:17,998 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:17,998 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:18,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1597 [2021-04-15 02:21:18,200 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:18,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:18,200 INFO L82 PathProgramCache]: Analyzing trace with hash -328243022, now seen corresponding path program 142 times [2021-04-15 02:21:18,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:18,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595965613] [2021-04-15 02:21:18,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:21:18,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595965613] [2021-04-15 02:21:18,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703475395] [2021-04-15 02:21:18,291 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 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 02:21:18,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:21:18,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:18,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:21:18,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:18,764 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:21:18,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:21:18,764 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 43 treesize of output 319 [2021-04-15 02:21:21,362 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1612 DAG size of output: 928 [2021-04-15 02:21:21,599 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 1621 DAG size of output: 937 [2021-04-15 02:21:22,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:21:22,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:21:22,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:21:22,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-04-15 02:21:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:22,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:22,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-04-15 02:21:22,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508058274] [2021-04-15 02:21:22,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:21:22,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:22,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:21:22,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:22,961 INFO L87 Difference]: Start difference. First operand 3208 states and 9399 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:23,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:23,132 INFO L93 Difference]: Finished difference Result 3340 states and 9684 transitions. [2021-04-15 02:21:23,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:21:23,132 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 02:21:23,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:23,136 INFO L225 Difference]: With dead ends: 3340 [2021-04-15 02:21:23,136 INFO L226 Difference]: Without dead ends: 3336 [2021-04-15 02:21:23,136 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 285.0ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:23,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-04-15 02:21:23,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 3260. [2021-04-15 02:21:23,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3260 states, 3259 states have (on average 2.933722000613685) internal successors, (9561), 3259 states have internal predecessors, (9561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:23,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3260 states to 3260 states and 9561 transitions. [2021-04-15 02:21:23,175 INFO L78 Accepts]: Start accepts. Automaton has 3260 states and 9561 transitions. Word has length 21 [2021-04-15 02:21:23,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:23,175 INFO L480 AbstractCegarLoop]: Abstraction has 3260 states and 9561 transitions. [2021-04-15 02:21:23,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:23,175 INFO L276 IsEmpty]: Start isEmpty. Operand 3260 states and 9561 transitions. [2021-04-15 02:21:23,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:21:23,177 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:23,177 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:23,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2575 [2021-04-15 02:21:23,378 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:23,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:23,378 INFO L82 PathProgramCache]: Analyzing trace with hash -2104000854, now seen corresponding path program 143 times [2021-04-15 02:21:23,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:23,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129223265] [2021-04-15 02:21:23,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:23,446 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:23,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129223265] [2021-04-15 02:21:23,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851628857] [2021-04-15 02:21:23,446 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 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 02:21:23,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:21:23,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:23,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:21:23,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:23,846 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:21:23,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:21:23,847 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 43 treesize of output 319 [2021-04-15 02:21:25,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:21:25,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:21:25,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:21:25,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-04-15 02:21:25,905 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:25,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:25,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-04-15 02:21:25,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549009058] [2021-04-15 02:21:25,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:21:25,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:25,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:21:25,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:25,906 INFO L87 Difference]: Start difference. First operand 3260 states and 9561 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:26,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:26,123 INFO L93 Difference]: Finished difference Result 3397 states and 9873 transitions. [2021-04-15 02:21:26,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:21:26,123 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 02:21:26,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:26,127 INFO L225 Difference]: With dead ends: 3397 [2021-04-15 02:21:26,127 INFO L226 Difference]: Without dead ends: 3392 [2021-04-15 02:21:26,128 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 238.1ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:26,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3392 states. [2021-04-15 02:21:26,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3392 to 3328. [2021-04-15 02:21:26,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3327 states have (on average 2.935076645626691) internal successors, (9765), 3327 states have internal predecessors, (9765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:26,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 9765 transitions. [2021-04-15 02:21:26,167 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 9765 transitions. Word has length 21 [2021-04-15 02:21:26,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:26,167 INFO L480 AbstractCegarLoop]: Abstraction has 3328 states and 9765 transitions. [2021-04-15 02:21:26,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:26,168 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 9765 transitions. [2021-04-15 02:21:26,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:21:26,170 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:26,170 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:26,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3503 [2021-04-15 02:21:26,375 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:26,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:26,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1317918798, now seen corresponding path program 144 times [2021-04-15 02:21:26,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:26,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204553729] [2021-04-15 02:21:26,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:26,444 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:26,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204553729] [2021-04-15 02:21:26,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630812584] [2021-04-15 02:21:26,445 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:26,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:21:26,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:26,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:21:26,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:26,804 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:21:26,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:21:26,804 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 43 treesize of output 319 [2021-04-15 02:21:27,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:21:27,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:21:27,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:21:27,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-04-15 02:21:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:27,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:27,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-04-15 02:21:27,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794994820] [2021-04-15 02:21:27,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:21:27,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:27,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:21:27,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:27,777 INFO L87 Difference]: Start difference. First operand 3328 states and 9765 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:28,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:28,057 INFO L93 Difference]: Finished difference Result 3484 states and 10127 transitions. [2021-04-15 02:21:28,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:21:28,058 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 02:21:28,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:28,062 INFO L225 Difference]: With dead ends: 3484 [2021-04-15 02:21:28,062 INFO L226 Difference]: Without dead ends: 3480 [2021-04-15 02:21:28,062 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 220.3ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:28,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2021-04-15 02:21:28,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3406. [2021-04-15 02:21:28,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3406 states, 3405 states have (on average 2.9392070484581496) internal successors, (10008), 3405 states have internal predecessors, (10008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:28,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3406 states to 3406 states and 10008 transitions. [2021-04-15 02:21:28,101 INFO L78 Accepts]: Start accepts. Automaton has 3406 states and 10008 transitions. Word has length 21 [2021-04-15 02:21:28,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:28,102 INFO L480 AbstractCegarLoop]: Abstraction has 3406 states and 10008 transitions. [2021-04-15 02:21:28,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:28,102 INFO L276 IsEmpty]: Start isEmpty. Operand 3406 states and 10008 transitions. [2021-04-15 02:21:28,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:21:28,105 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:28,105 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:28,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4061,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:28,305 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:28,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:28,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1575788458, now seen corresponding path program 145 times [2021-04-15 02:21:28,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:28,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479529379] [2021-04-15 02:21:28,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:21:28,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479529379] [2021-04-15 02:21:28,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959520106] [2021-04-15 02:21:28,370 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 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 02:21:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:28,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:21:28,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:28,750 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:21:28,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:21:28,750 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 43 treesize of output 319 [2021-04-15 02:21:29,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:21:29,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:21:29,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:21:29,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-04-15 02:21:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:29,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:29,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-04-15 02:21:29,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372130776] [2021-04-15 02:21:29,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:21:29,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:29,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:21:29,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:29,743 INFO L87 Difference]: Start difference. First operand 3406 states and 10008 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:29,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:29,943 INFO L93 Difference]: Finished difference Result 3580 states and 10428 transitions. [2021-04-15 02:21:29,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:21:29,943 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 02:21:29,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:29,947 INFO L225 Difference]: With dead ends: 3580 [2021-04-15 02:21:29,947 INFO L226 Difference]: Without dead ends: 3576 [2021-04-15 02:21:29,948 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 235.5ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:29,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3576 states. [2021-04-15 02:21:29,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3576 to 3502. [2021-04-15 02:21:29,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3502 states, 3501 states have (on average 2.9460154241645244) internal successors, (10314), 3501 states have internal predecessors, (10314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:29,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3502 states to 3502 states and 10314 transitions. [2021-04-15 02:21:29,987 INFO L78 Accepts]: Start accepts. Automaton has 3502 states and 10314 transitions. Word has length 21 [2021-04-15 02:21:29,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:29,987 INFO L480 AbstractCegarLoop]: Abstraction has 3502 states and 10314 transitions. [2021-04-15 02:21:29,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:29,987 INFO L276 IsEmpty]: Start isEmpty. Operand 3502 states and 10314 transitions. [2021-04-15 02:21:29,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:21:29,990 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:29,990 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:30,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4386 [2021-04-15 02:21:30,191 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:30,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:30,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1086400178, now seen corresponding path program 146 times [2021-04-15 02:21:30,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:30,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784807068] [2021-04-15 02:21:30,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:30,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784807068] [2021-04-15 02:21:30,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850950842] [2021-04-15 02:21:30,252 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 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 02:21:30,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:21:30,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:30,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:21:30,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:30,631 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:21:30,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:21:30,632 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 43 treesize of output 319 [2021-04-15 02:21:32,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:21:32,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:21:32,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:21:32,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-04-15 02:21:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:32,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:32,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-04-15 02:21:32,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602942489] [2021-04-15 02:21:32,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:21:32,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:32,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:21:32,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:32,050 INFO L87 Difference]: Start difference. First operand 3502 states and 10314 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:32,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:32,380 INFO L93 Difference]: Finished difference Result 3937 states and 11542 transitions. [2021-04-15 02:21:32,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:21:32,381 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 02:21:32,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:32,385 INFO L225 Difference]: With dead ends: 3937 [2021-04-15 02:21:32,385 INFO L226 Difference]: Without dead ends: 3934 [2021-04-15 02:21:32,386 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 237.6ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:32,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3934 states. [2021-04-15 02:21:32,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3934 to 3870. [2021-04-15 02:21:32,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3869 states have (on average 2.9581287154303437) internal successors, (11445), 3869 states have internal predecessors, (11445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:32,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 11445 transitions. [2021-04-15 02:21:32,427 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 11445 transitions. Word has length 21 [2021-04-15 02:21:32,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:32,428 INFO L480 AbstractCegarLoop]: Abstraction has 3870 states and 11445 transitions. [2021-04-15 02:21:32,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:32,428 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 11445 transitions. [2021-04-15 02:21:32,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:21:32,431 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:32,431 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:32,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4797,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:32,632 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:32,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:32,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1199734614, now seen corresponding path program 147 times [2021-04-15 02:21:32,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:32,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168881420] [2021-04-15 02:21:32,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:32,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:32,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168881420] [2021-04-15 02:21:32,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212304144] [2021-04-15 02:21:32,695 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 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 02:21:32,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:21:32,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:32,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:21:32,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:33,065 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:21:33,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:21:33,065 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 43 treesize of output 319 [2021-04-15 02:21:37,417 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 2305 DAG size of output: 1697 [2021-04-15 02:21:37,603 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 2314 DAG size of output: 1681 [2021-04-15 02:21:37,836 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 2482 DAG size of output: 1836 [2021-04-15 02:21:38,039 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 2499 DAG size of output: 1849 [2021-04-15 02:21:38,264 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 2591 DAG size of output: 1909 [2021-04-15 02:21:38,489 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 2591 DAG size of output: 1909 [2021-04-15 02:21:38,751 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 2600 DAG size of output: 1918 [2021-04-15 02:21:38,905 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 1918 DAG size of output: 1874 [2021-04-15 02:21:39,159 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 1794 DAG size of output: 2603 [2021-04-15 02:21:39,311 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 1766 DAG size of output: 1632 [2021-04-15 02:21:39,503 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1625 DAG size of output: 1606 [2021-04-15 02:21:39,664 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 1590 DAG size of output: 1590 [2021-04-15 02:21:40,383 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 1440 DAG size of output: 1970 [2021-04-15 02:21:40,541 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 1362 DAG size of output: 1601 [2021-04-15 02:21:42,340 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 2134 DAG size of output: 1020 [2021-04-15 02:21:42,545 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 3238 DAG size of output: 1088 [2021-04-15 02:21:43,936 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 4072 DAG size of output: 1488 [2021-04-15 02:21:44,111 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 4072 DAG size of output: 1488 [2021-04-15 02:21:44,294 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 4076 DAG size of output: 1492 [2021-04-15 02:21:44,439 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 1494 DAG size of output: 1390 [2021-04-15 02:21:45,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:21:45,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:21:45,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:21:45,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-04-15 02:21:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:45,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:45,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-04-15 02:21:45,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692429952] [2021-04-15 02:21:45,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:21:45,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:45,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:21:45,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:45,206 INFO L87 Difference]: Start difference. First operand 3870 states and 11445 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:45,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:45,457 INFO L93 Difference]: Finished difference Result 4316 states and 12694 transitions. [2021-04-15 02:21:45,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:21:45,458 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 02:21:45,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:45,464 INFO L225 Difference]: With dead ends: 4316 [2021-04-15 02:21:45,464 INFO L226 Difference]: Without dead ends: 4313 [2021-04-15 02:21:45,464 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 224.8ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:45,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4313 states. [2021-04-15 02:21:45,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4313 to 4248. [2021-04-15 02:21:45,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4248 states, 4247 states have (on average 2.9684483164586766) internal successors, (12607), 4247 states have internal predecessors, (12607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:45,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4248 states to 4248 states and 12607 transitions. [2021-04-15 02:21:45,520 INFO L78 Accepts]: Start accepts. Automaton has 4248 states and 12607 transitions. Word has length 21 [2021-04-15 02:21:45,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:45,520 INFO L480 AbstractCegarLoop]: Abstraction has 4248 states and 12607 transitions. [2021-04-15 02:21:45,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:45,520 INFO L276 IsEmpty]: Start isEmpty. Operand 4248 states and 12607 transitions. [2021-04-15 02:21:45,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:21:45,525 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:45,525 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:45,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5305,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:45,725 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:45,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:45,726 INFO L82 PathProgramCache]: Analyzing trace with hash 944530866, now seen corresponding path program 148 times [2021-04-15 02:21:45,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:45,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936931014] [2021-04-15 02:21:45,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:45,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936931014] [2021-04-15 02:21:45,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630606775] [2021-04-15 02:21:45,791 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 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 02:21:45,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:21:45,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:45,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:21:45,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:46,173 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:21:46,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:21:46,173 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 43 treesize of output 319 [2021-04-15 02:21:49,379 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 1858 DAG size of output: 1269 [2021-04-15 02:21:51,628 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 1484 DAG size of output: 1222 [2021-04-15 02:21:51,773 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 1652 DAG size of output: 1381 [2021-04-15 02:21:52,113 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 3032 DAG size of output: 2343 [2021-04-15 02:21:52,406 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 3032 DAG size of output: 2343 [2021-04-15 02:21:52,706 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 3038 DAG size of output: 2349 [2021-04-15 02:21:52,862 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 2349 DAG size of output: 1855 [2021-04-15 02:21:53,042 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 1297 DAG size of output: 1672 [2021-04-15 02:21:55,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:21:55,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:21:55,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:21:55,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-04-15 02:21:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:55,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:55,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-04-15 02:21:55,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180934165] [2021-04-15 02:21:55,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:21:55,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:55,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:21:55,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:55,832 INFO L87 Difference]: Start difference. First operand 4248 states and 12607 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:56,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:56,095 INFO L93 Difference]: Finished difference Result 4620 states and 13625 transitions. [2021-04-15 02:21:56,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:21:56,095 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 02:21:56,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:56,100 INFO L225 Difference]: With dead ends: 4620 [2021-04-15 02:21:56,101 INFO L226 Difference]: Without dead ends: 4617 [2021-04-15 02:21:56,101 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 238.9ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:56,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4617 states. [2021-04-15 02:21:56,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4617 to 4548. [2021-04-15 02:21:56,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4548 states, 4547 states have (on average 2.9762480756542775) internal successors, (13533), 4547 states have internal predecessors, (13533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:56,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4548 states to 4548 states and 13533 transitions. [2021-04-15 02:21:56,153 INFO L78 Accepts]: Start accepts. Automaton has 4548 states and 13533 transitions. Word has length 21 [2021-04-15 02:21:56,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:56,153 INFO L480 AbstractCegarLoop]: Abstraction has 4548 states and 13533 transitions. [2021-04-15 02:21:56,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:56,153 INFO L276 IsEmpty]: Start isEmpty. Operand 4548 states and 13533 transitions. [2021-04-15 02:21:56,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:56,157 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:56,157 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:56,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8218,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:56,358 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:56,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:56,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1973759689, now seen corresponding path program 149 times [2021-04-15 02:21:56,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:56,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417056474] [2021-04-15 02:21:56,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:56,446 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:56,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417056474] [2021-04-15 02:21:56,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179931083] [2021-04-15 02:21:56,446 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 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 02:21:56,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:21:56,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:56,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:56,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:56,561 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:56,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:56,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:21:56,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834614377] [2021-04-15 02:21:56,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:21:56,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:56,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:21:56,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:21:56,562 INFO L87 Difference]: Start difference. First operand 4548 states and 13533 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:21:56,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:56,855 INFO L93 Difference]: Finished difference Result 4872 states and 14053 transitions. [2021-04-15 02:21:56,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 02:21:56,855 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-04-15 02:21:56,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:56,860 INFO L225 Difference]: With dead ends: 4872 [2021-04-15 02:21:56,860 INFO L226 Difference]: Without dead ends: 4863 [2021-04-15 02:21:56,860 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 245.8ms TimeCoverageRelationStatistics Valid=423, Invalid=837, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 02:21:56,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4863 states. [2021-04-15 02:21:56,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4863 to 4581. [2021-04-15 02:21:56,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4581 states, 4580 states have (on average 2.9753275109170305) internal successors, (13627), 4580 states have internal predecessors, (13627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:56,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 13627 transitions. [2021-04-15 02:21:56,906 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 13627 transitions. Word has length 22 [2021-04-15 02:21:56,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:56,906 INFO L480 AbstractCegarLoop]: Abstraction has 4581 states and 13627 transitions. [2021-04-15 02:21:56,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:21:56,906 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 13627 transitions. [2021-04-15 02:21:56,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:56,909 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:56,909 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:57,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10446 [2021-04-15 02:21:57,110 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:57,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:57,110 INFO L82 PathProgramCache]: Analyzing trace with hash 510781845, now seen corresponding path program 150 times [2021-04-15 02:21:57,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:57,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772204671] [2021-04-15 02:21:57,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:57,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772204671] [2021-04-15 02:21:57,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135631689] [2021-04-15 02:21:57,179 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 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 02:21:57,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:21:57,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:57,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:57,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:57,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:57,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:21:57,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645816235] [2021-04-15 02:21:57,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:21:57,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:57,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:21:57,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:21:57,258 INFO L87 Difference]: Start difference. First operand 4581 states and 13627 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 02:21:57,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:57,340 INFO L93 Difference]: Finished difference Result 5002 states and 14452 transitions. [2021-04-15 02:21:57,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:21:57,341 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 22 [2021-04-15 02:21:57,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:57,345 INFO L225 Difference]: With dead ends: 5002 [2021-04-15 02:21:57,345 INFO L226 Difference]: Without dead ends: 5002 [2021-04-15 02:21:57,345 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:57,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5002 states. [2021-04-15 02:21:57,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5002 to 4539. [2021-04-15 02:21:57,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4539 states, 4538 states have (on average 2.9726751873071837) internal successors, (13490), 4538 states have internal predecessors, (13490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:57,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 13490 transitions. [2021-04-15 02:21:57,393 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 13490 transitions. Word has length 22 [2021-04-15 02:21:57,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:57,393 INFO L480 AbstractCegarLoop]: Abstraction has 4539 states and 13490 transitions. [2021-04-15 02:21:57,393 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 02:21:57,393 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 13490 transitions. [2021-04-15 02:21:57,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:57,396 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:57,396 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:57,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10447 [2021-04-15 02:21:57,597 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:57,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:57,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1655986249, now seen corresponding path program 151 times [2021-04-15 02:21:57,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:57,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818937985] [2021-04-15 02:21:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:57,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818937985] [2021-04-15 02:21:57,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011415409] [2021-04-15 02:21:57,665 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 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 02:21:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:57,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:57,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:57,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:57,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:21:57,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913561864] [2021-04-15 02:21:57,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:21:57,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:57,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:21:57,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:21:57,732 INFO L87 Difference]: Start difference. First operand 4539 states and 13490 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 02:21:57,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:57,887 INFO L93 Difference]: Finished difference Result 4827 states and 13939 transitions. [2021-04-15 02:21:57,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:21:57,887 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 22 [2021-04-15 02:21:57,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:57,891 INFO L225 Difference]: With dead ends: 4827 [2021-04-15 02:21:57,891 INFO L226 Difference]: Without dead ends: 4825 [2021-04-15 02:21:57,892 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=209, Invalid=343, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:57,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4825 states. [2021-04-15 02:21:57,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4825 to 4570. [2021-04-15 02:21:57,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 4569 states have (on average 2.9739549135478223) internal successors, (13588), 4569 states have internal predecessors, (13588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:57,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 13588 transitions. [2021-04-15 02:21:57,936 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 13588 transitions. Word has length 22 [2021-04-15 02:21:57,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:57,936 INFO L480 AbstractCegarLoop]: Abstraction has 4570 states and 13588 transitions. [2021-04-15 02:21:57,936 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 02:21:57,936 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 13588 transitions. [2021-04-15 02:21:57,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:57,939 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:57,939 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:58,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10448,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:58,140 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:58,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:58,140 INFO L82 PathProgramCache]: Analyzing trace with hash -921231987, now seen corresponding path program 152 times [2021-04-15 02:21:58,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:58,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098361671] [2021-04-15 02:21:58,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:58,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098361671] [2021-04-15 02:21:58,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857387260] [2021-04-15 02:21:58,204 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 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 02:21:58,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:21:58,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:58,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:58,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:58,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:58,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:21:58,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116861201] [2021-04-15 02:21:58,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:21:58,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:58,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:21:58,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:21:58,272 INFO L87 Difference]: Start difference. First operand 4570 states and 13588 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 02:21:58,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:58,339 INFO L93 Difference]: Finished difference Result 5088 states and 14673 transitions. [2021-04-15 02:21:58,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:21:58,340 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 22 [2021-04-15 02:21:58,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:58,344 INFO L225 Difference]: With dead ends: 5088 [2021-04-15 02:21:58,344 INFO L226 Difference]: Without dead ends: 5088 [2021-04-15 02:21:58,344 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:58,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5088 states. [2021-04-15 02:21:58,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5088 to 4572. [2021-04-15 02:21:58,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4572 states, 4571 states have (on average 2.9739663093415007) internal successors, (13594), 4571 states have internal predecessors, (13594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:58,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4572 states to 4572 states and 13594 transitions. [2021-04-15 02:21:58,395 INFO L78 Accepts]: Start accepts. Automaton has 4572 states and 13594 transitions. Word has length 22 [2021-04-15 02:21:58,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:58,395 INFO L480 AbstractCegarLoop]: Abstraction has 4572 states and 13594 transitions. [2021-04-15 02:21:58,395 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 02:21:58,395 INFO L276 IsEmpty]: Start isEmpty. Operand 4572 states and 13594 transitions. [2021-04-15 02:21:58,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:58,399 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:58,399 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:58,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10449,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:58,599 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:58,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:58,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1644687975, now seen corresponding path program 153 times [2021-04-15 02:21:58,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:58,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11723928] [2021-04-15 02:21:58,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:58,667 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:58,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11723928] [2021-04-15 02:21:58,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967200687] [2021-04-15 02:21:58,667 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 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 02:21:58,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:21:58,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:58,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:58,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:58,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:58,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:21:58,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844229306] [2021-04-15 02:21:58,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:21:58,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:58,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:21:58,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:58,738 INFO L87 Difference]: Start difference. First operand 4572 states and 13594 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 02:21:58,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:58,826 INFO L93 Difference]: Finished difference Result 5431 states and 15640 transitions. [2021-04-15 02:21:58,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:21:58,826 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 22 [2021-04-15 02:21:58,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:58,830 INFO L225 Difference]: With dead ends: 5431 [2021-04-15 02:21:58,830 INFO L226 Difference]: Without dead ends: 5431 [2021-04-15 02:21:58,830 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:21:58,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5431 states. [2021-04-15 02:21:58,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5431 to 4529. [2021-04-15 02:21:58,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4529 states, 4528 states have (on average 2.9712897526501765) internal successors, (13454), 4528 states have internal predecessors, (13454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:58,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4529 states to 4529 states and 13454 transitions. [2021-04-15 02:21:58,878 INFO L78 Accepts]: Start accepts. Automaton has 4529 states and 13454 transitions. Word has length 22 [2021-04-15 02:21:58,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:58,878 INFO L480 AbstractCegarLoop]: Abstraction has 4529 states and 13454 transitions. [2021-04-15 02:21:58,878 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 02:21:58,878 INFO L276 IsEmpty]: Start isEmpty. Operand 4529 states and 13454 transitions. [2021-04-15 02:21:58,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:58,881 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:58,881 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:59,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10450,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:59,081 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:59,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:59,082 INFO L82 PathProgramCache]: Analyzing trace with hash 213230417, now seen corresponding path program 154 times [2021-04-15 02:21:59,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:59,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294098468] [2021-04-15 02:21:59,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:59,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294098468] [2021-04-15 02:21:59,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968964431] [2021-04-15 02:21:59,150 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 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 02:21:59,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:21:59,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:59,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:59,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:59,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:59,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:21:59,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399882878] [2021-04-15 02:21:59,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:21:59,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:59,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:21:59,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:21:59,206 INFO L87 Difference]: Start difference. First operand 4529 states and 13454 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 02:21:59,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:59,359 INFO L93 Difference]: Finished difference Result 4816 states and 13905 transitions. [2021-04-15 02:21:59,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:21:59,359 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 22 [2021-04-15 02:21:59,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:59,363 INFO L225 Difference]: With dead ends: 4816 [2021-04-15 02:21:59,363 INFO L226 Difference]: Without dead ends: 4814 [2021-04-15 02:21:59,363 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=208, Invalid=344, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:59,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4814 states. [2021-04-15 02:21:59,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4814 to 4562. [2021-04-15 02:21:59,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4562 states, 4561 states have (on average 2.9723744792808593) internal successors, (13557), 4561 states have internal predecessors, (13557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:59,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4562 states to 4562 states and 13557 transitions. [2021-04-15 02:21:59,412 INFO L78 Accepts]: Start accepts. Automaton has 4562 states and 13557 transitions. Word has length 22 [2021-04-15 02:21:59,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:59,412 INFO L480 AbstractCegarLoop]: Abstraction has 4562 states and 13557 transitions. [2021-04-15 02:21:59,412 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 02:21:59,412 INFO L276 IsEmpty]: Start isEmpty. Operand 4562 states and 13557 transitions. [2021-04-15 02:21:59,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:59,416 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:59,416 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:59,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10451,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:59,616 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:59,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:59,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1930979477, now seen corresponding path program 155 times [2021-04-15 02:21:59,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:59,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204236205] [2021-04-15 02:21:59,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:59,676 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:59,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204236205] [2021-04-15 02:21:59,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955422138] [2021-04-15 02:21:59,676 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 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 02:21:59,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:21:59,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:59,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:21:59,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:59,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:59,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:21:59,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125716736] [2021-04-15 02:21:59,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:21:59,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:59,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:21:59,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:21:59,740 INFO L87 Difference]: Start difference. First operand 4562 states and 13557 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 02:21:59,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:59,809 INFO L93 Difference]: Finished difference Result 5117 states and 14760 transitions. [2021-04-15 02:21:59,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:21:59,810 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 22 [2021-04-15 02:21:59,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:59,814 INFO L225 Difference]: With dead ends: 5117 [2021-04-15 02:21:59,814 INFO L226 Difference]: Without dead ends: 5117 [2021-04-15 02:21:59,814 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:59,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-04-15 02:21:59,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4563. [2021-04-15 02:21:59,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4562 states have (on average 2.9723805348531345) internal successors, (13560), 4562 states have internal predecessors, (13560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:59,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 13560 transitions. [2021-04-15 02:21:59,861 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 13560 transitions. Word has length 22 [2021-04-15 02:21:59,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:59,861 INFO L480 AbstractCegarLoop]: Abstraction has 4563 states and 13560 transitions. [2021-04-15 02:21:59,861 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 02:21:59,861 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 13560 transitions. [2021-04-15 02:21:59,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:21:59,864 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:59,864 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:00,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10452 [2021-04-15 02:22:00,065 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:00,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:00,065 INFO L82 PathProgramCache]: Analyzing trace with hash 201932143, now seen corresponding path program 156 times [2021-04-15 02:22:00,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:00,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713497498] [2021-04-15 02:22:00,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:00,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713497498] [2021-04-15 02:22:00,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019963466] [2021-04-15 02:22:00,127 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 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 02:22:00,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:22:00,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:00,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:00,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:00,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:00,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:22:00,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429398064] [2021-04-15 02:22:00,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:00,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:00,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:00,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:00,197 INFO L87 Difference]: Start difference. First operand 4563 states and 13560 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 02:22:00,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:00,297 INFO L93 Difference]: Finished difference Result 5624 states and 16198 transitions. [2021-04-15 02:22:00,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:22:00,298 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 22 [2021-04-15 02:22:00,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:00,302 INFO L225 Difference]: With dead ends: 5624 [2021-04-15 02:22:00,302 INFO L226 Difference]: Without dead ends: 5624 [2021-04-15 02:22:00,302 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:22:00,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5624 states. [2021-04-15 02:22:00,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5624 to 4520. [2021-04-15 02:22:00,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4520 states, 4519 states have (on average 2.969240982518256) internal successors, (13418), 4519 states have internal predecessors, (13418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:00,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4520 states to 4520 states and 13418 transitions. [2021-04-15 02:22:00,352 INFO L78 Accepts]: Start accepts. Automaton has 4520 states and 13418 transitions. Word has length 22 [2021-04-15 02:22:00,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:00,353 INFO L480 AbstractCegarLoop]: Abstraction has 4520 states and 13418 transitions. [2021-04-15 02:22:00,353 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 02:22:00,353 INFO L276 IsEmpty]: Start isEmpty. Operand 4520 states and 13418 transitions. [2021-04-15 02:22:00,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:00,356 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:00,356 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:00,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10453 [2021-04-15 02:22:00,556 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:00,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:00,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1858927659, now seen corresponding path program 157 times [2021-04-15 02:22:00,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:00,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814099327] [2021-04-15 02:22:00,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:00,625 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:00,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814099327] [2021-04-15 02:22:00,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530683860] [2021-04-15 02:22:00,625 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 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 02:22:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:00,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:00,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:00,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:00,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:22:00,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430157709] [2021-04-15 02:22:00,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:00,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:00,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:00,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:00,699 INFO L87 Difference]: Start difference. First operand 4520 states and 13418 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 02:22:00,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:00,836 INFO L93 Difference]: Finished difference Result 7402 states and 21575 transitions. [2021-04-15 02:22:00,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:22:00,837 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 22 [2021-04-15 02:22:00,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:00,843 INFO L225 Difference]: With dead ends: 7402 [2021-04-15 02:22:00,843 INFO L226 Difference]: Without dead ends: 7402 [2021-04-15 02:22:00,843 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:22:00,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7402 states. [2021-04-15 02:22:00,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7402 to 6132. [2021-04-15 02:22:00,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6132 states, 6131 states have (on average 2.9955961507095092) internal successors, (18366), 6131 states have internal predecessors, (18366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:00,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6132 states to 6132 states and 18366 transitions. [2021-04-15 02:22:00,918 INFO L78 Accepts]: Start accepts. Automaton has 6132 states and 18366 transitions. Word has length 22 [2021-04-15 02:22:00,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:00,918 INFO L480 AbstractCegarLoop]: Abstraction has 6132 states and 18366 transitions. [2021-04-15 02:22:00,918 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 02:22:00,918 INFO L276 IsEmpty]: Start isEmpty. Operand 6132 states and 18366 transitions. [2021-04-15 02:22:00,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:00,924 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:00,924 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:01,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10454 [2021-04-15 02:22:01,125 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:01,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:01,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1562527415, now seen corresponding path program 158 times [2021-04-15 02:22:01,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:01,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027204830] [2021-04-15 02:22:01,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:01,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:01,184 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:01,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027204830] [2021-04-15 02:22:01,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927602998] [2021-04-15 02:22:01,184 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 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 02:22:01,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:01,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:01,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:01,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:01,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:01,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:22:01,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496057364] [2021-04-15 02:22:01,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:01,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:01,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:01,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:01,258 INFO L87 Difference]: Start difference. First operand 6132 states and 18366 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 02:22:01,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:01,447 INFO L93 Difference]: Finished difference Result 6467 states and 18987 transitions. [2021-04-15 02:22:01,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:22:01,447 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 22 [2021-04-15 02:22:01,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:01,453 INFO L225 Difference]: With dead ends: 6467 [2021-04-15 02:22:01,454 INFO L226 Difference]: Without dead ends: 6465 [2021-04-15 02:22:01,454 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=207, Invalid=345, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:22:01,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6465 states. [2021-04-15 02:22:01,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6465 to 6222. [2021-04-15 02:22:01,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6222 states, 6221 states have (on average 2.9975888120880887) internal successors, (18648), 6221 states have internal predecessors, (18648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:01,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 18648 transitions. [2021-04-15 02:22:01,525 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 18648 transitions. Word has length 22 [2021-04-15 02:22:01,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:01,525 INFO L480 AbstractCegarLoop]: Abstraction has 6222 states and 18648 transitions. [2021-04-15 02:22:01,525 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 02:22:01,525 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 18648 transitions. [2021-04-15 02:22:01,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:01,529 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:01,529 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:01,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10455,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:01,730 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:01,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:01,730 INFO L82 PathProgramCache]: Analyzing trace with hash 155221645, now seen corresponding path program 159 times [2021-04-15 02:22:01,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:01,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113832020] [2021-04-15 02:22:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:01,793 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:01,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113832020] [2021-04-15 02:22:01,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232286370] [2021-04-15 02:22:01,793 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:01,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:22:01,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:01,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:01,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:01,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:01,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:22:01,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920332521] [2021-04-15 02:22:01,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:01,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:01,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:01,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:01,872 INFO L87 Difference]: Start difference. First operand 6222 states and 18648 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 02:22:01,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:01,942 INFO L93 Difference]: Finished difference Result 6454 states and 18938 transitions. [2021-04-15 02:22:01,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:22:01,942 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 22 [2021-04-15 02:22:01,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:01,948 INFO L225 Difference]: With dead ends: 6454 [2021-04-15 02:22:01,948 INFO L226 Difference]: Without dead ends: 6454 [2021-04-15 02:22:01,948 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:01,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6454 states. [2021-04-15 02:22:02,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6454 to 6210. [2021-04-15 02:22:02,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6210 states, 6209 states have (on average 2.995490417136415) internal successors, (18599), 6209 states have internal predecessors, (18599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:02,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6210 states to 6210 states and 18599 transitions. [2021-04-15 02:22:02,016 INFO L78 Accepts]: Start accepts. Automaton has 6210 states and 18599 transitions. Word has length 22 [2021-04-15 02:22:02,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:02,017 INFO L480 AbstractCegarLoop]: Abstraction has 6210 states and 18599 transitions. [2021-04-15 02:22:02,017 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 02:22:02,017 INFO L276 IsEmpty]: Start isEmpty. Operand 6210 states and 18599 transitions. [2021-04-15 02:22:02,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:02,021 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:02,021 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:02,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10456 [2021-04-15 02:22:02,221 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:02,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:02,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1573825689, now seen corresponding path program 160 times [2021-04-15 02:22:02,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:02,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559655573] [2021-04-15 02:22:02,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:02,286 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:02,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559655573] [2021-04-15 02:22:02,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095659365] [2021-04-15 02:22:02,287 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 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 02:22:02,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:02,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:02,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:02,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:02,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:02,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:22:02,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586785657] [2021-04-15 02:22:02,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:02,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:02,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:02,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:02,350 INFO L87 Difference]: Start difference. First operand 6210 states and 18599 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 02:22:02,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:02,441 INFO L93 Difference]: Finished difference Result 7159 states and 20967 transitions. [2021-04-15 02:22:02,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:22:02,441 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 22 [2021-04-15 02:22:02,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:02,447 INFO L225 Difference]: With dead ends: 7159 [2021-04-15 02:22:02,447 INFO L226 Difference]: Without dead ends: 7159 [2021-04-15 02:22:02,447 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:22:02,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7159 states. [2021-04-15 02:22:02,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7159 to 6221. [2021-04-15 02:22:02,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6221 states, 6220 states have (on average 2.995498392282958) internal successors, (18632), 6220 states have internal predecessors, (18632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:02,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6221 states to 6221 states and 18632 transitions. [2021-04-15 02:22:02,516 INFO L78 Accepts]: Start accepts. Automaton has 6221 states and 18632 transitions. Word has length 22 [2021-04-15 02:22:02,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:02,516 INFO L480 AbstractCegarLoop]: Abstraction has 6221 states and 18632 transitions. [2021-04-15 02:22:02,516 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 02:22:02,516 INFO L276 IsEmpty]: Start isEmpty. Operand 6221 states and 18632 transitions. [2021-04-15 02:22:02,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:02,520 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:02,520 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:02,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10457,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:02,720 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:02,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:02,721 INFO L82 PathProgramCache]: Analyzing trace with hash 660281805, now seen corresponding path program 161 times [2021-04-15 02:22:02,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:02,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577815309] [2021-04-15 02:22:02,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:02,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577815309] [2021-04-15 02:22:02,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866227062] [2021-04-15 02:22:02,794 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 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 02:22:02,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:22:02,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:02,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:02,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:02,857 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:02,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:02,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:22:02,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539026158] [2021-04-15 02:22:02,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:02,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:02,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:02,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:02,858 INFO L87 Difference]: Start difference. First operand 6221 states and 18632 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 02:22:02,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:02,967 INFO L93 Difference]: Finished difference Result 10072 states and 29921 transitions. [2021-04-15 02:22:02,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:22:02,968 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 22 [2021-04-15 02:22:02,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:02,979 INFO L225 Difference]: With dead ends: 10072 [2021-04-15 02:22:02,980 INFO L226 Difference]: Without dead ends: 10072 [2021-04-15 02:22:02,980 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:22:02,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10072 states. [2021-04-15 02:22:03,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10072 to 9194. [2021-04-15 02:22:03,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9194 states, 9193 states have (on average 3.024583922549766) internal successors, (27805), 9193 states have internal predecessors, (27805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:03,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9194 states to 9194 states and 27805 transitions. [2021-04-15 02:22:03,133 INFO L78 Accepts]: Start accepts. Automaton has 9194 states and 27805 transitions. Word has length 22 [2021-04-15 02:22:03,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:03,134 INFO L480 AbstractCegarLoop]: Abstraction has 9194 states and 27805 transitions. [2021-04-15 02:22:03,134 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 02:22:03,135 INFO L276 IsEmpty]: Start isEmpty. Operand 9194 states and 27805 transitions. [2021-04-15 02:22:03,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:03,142 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:03,142 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:03,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10458 [2021-04-15 02:22:03,343 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:03,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:03,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1198137383, now seen corresponding path program 162 times [2021-04-15 02:22:03,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:03,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152077349] [2021-04-15 02:22:03,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:03,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152077349] [2021-04-15 02:22:03,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536972528] [2021-04-15 02:22:03,424 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:03,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:22:03,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:03,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:03,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:03,507 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:03,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:03,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:22:03,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251117996] [2021-04-15 02:22:03,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:03,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:03,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:03,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:03,508 INFO L87 Difference]: Start difference. First operand 9194 states and 27805 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 02:22:03,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:03,674 INFO L93 Difference]: Finished difference Result 13143 states and 39385 transitions. [2021-04-15 02:22:03,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:22:03,675 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 22 [2021-04-15 02:22:03,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:03,688 INFO L225 Difference]: With dead ends: 13143 [2021-04-15 02:22:03,689 INFO L226 Difference]: Without dead ends: 13143 [2021-04-15 02:22:03,689 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:22:03,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13143 states. [2021-04-15 02:22:03,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13143 to 11491. [2021-04-15 02:22:03,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11491 states, 11490 states have (on average 3.0464751958224543) internal successors, (35004), 11490 states have internal predecessors, (35004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:03,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11491 states to 11491 states and 35004 transitions. [2021-04-15 02:22:03,835 INFO L78 Accepts]: Start accepts. Automaton has 11491 states and 35004 transitions. Word has length 22 [2021-04-15 02:22:03,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:03,836 INFO L480 AbstractCegarLoop]: Abstraction has 11491 states and 35004 transitions. [2021-04-15 02:22:03,836 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 02:22:03,836 INFO L276 IsEmpty]: Start isEmpty. Operand 11491 states and 35004 transitions. [2021-04-15 02:22:03,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:03,844 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:03,844 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:04,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10459 [2021-04-15 02:22:04,045 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:04,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:04,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1940843115, now seen corresponding path program 163 times [2021-04-15 02:22:04,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:04,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352849243] [2021-04-15 02:22:04,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:22:04,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352849243] [2021-04-15 02:22:04,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172753838] [2021-04-15 02:22:04,104 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 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 02:22:04,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:04,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:04,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:22:04,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:04,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:22:04,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117335109] [2021-04-15 02:22:04,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:22:04,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:04,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:22:04,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:22:04,166 INFO L87 Difference]: Start difference. First operand 11491 states and 35004 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 02:22:04,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:04,333 INFO L93 Difference]: Finished difference Result 12000 states and 36264 transitions. [2021-04-15 02:22:04,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:22:04,334 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 22 [2021-04-15 02:22:04,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:04,349 INFO L225 Difference]: With dead ends: 12000 [2021-04-15 02:22:04,349 INFO L226 Difference]: Without dead ends: 11996 [2021-04-15 02:22:04,349 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:22:04,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11996 states. [2021-04-15 02:22:04,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11996 to 11808. [2021-04-15 02:22:04,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11808 states, 11807 states have (on average 3.0505632252053867) internal successors, (36018), 11807 states have internal predecessors, (36018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:04,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11808 states to 11808 states and 36018 transitions. [2021-04-15 02:22:04,524 INFO L78 Accepts]: Start accepts. Automaton has 11808 states and 36018 transitions. Word has length 22 [2021-04-15 02:22:04,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:04,524 INFO L480 AbstractCegarLoop]: Abstraction has 11808 states and 36018 transitions. [2021-04-15 02:22:04,524 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 02:22:04,524 INFO L276 IsEmpty]: Start isEmpty. Operand 11808 states and 36018 transitions. [2021-04-15 02:22:04,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:04,534 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:04,534 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:04,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10460,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:04,735 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:04,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:04,735 INFO L82 PathProgramCache]: Analyzing trace with hash 469575189, now seen corresponding path program 164 times [2021-04-15 02:22:04,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:04,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804726033] [2021-04-15 02:22:04,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:04,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804726033] [2021-04-15 02:22:04,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135122926] [2021-04-15 02:22:04,795 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 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 02:22:04,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:04,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:04,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:04,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:04,856 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:04,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:04,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:22:04,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289154944] [2021-04-15 02:22:04,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:04,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:04,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:04,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:04,857 INFO L87 Difference]: Start difference. First operand 11808 states and 36018 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 02:22:04,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:04,993 INFO L93 Difference]: Finished difference Result 14397 states and 43404 transitions. [2021-04-15 02:22:04,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:22:04,994 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 22 [2021-04-15 02:22:04,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:05,015 INFO L225 Difference]: With dead ends: 14397 [2021-04-15 02:22:05,015 INFO L226 Difference]: Without dead ends: 14397 [2021-04-15 02:22:05,015 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:22:05,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14397 states. [2021-04-15 02:22:05,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14397 to 12614. [2021-04-15 02:22:05,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12614 states, 12613 states have (on average 3.0629509236502024) internal successors, (38633), 12613 states have internal predecessors, (38633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:05,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12614 states to 12614 states and 38633 transitions. [2021-04-15 02:22:05,226 INFO L78 Accepts]: Start accepts. Automaton has 12614 states and 38633 transitions. Word has length 22 [2021-04-15 02:22:05,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:05,226 INFO L480 AbstractCegarLoop]: Abstraction has 12614 states and 38633 transitions. [2021-04-15 02:22:05,227 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 02:22:05,227 INFO L276 IsEmpty]: Start isEmpty. Operand 12614 states and 38633 transitions. [2021-04-15 02:22:05,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:05,235 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:05,235 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:05,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10461,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:05,436 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:05,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:05,436 INFO L82 PathProgramCache]: Analyzing trace with hash -36771077, now seen corresponding path program 165 times [2021-04-15 02:22:05,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:05,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229270054] [2021-04-15 02:22:05,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:05,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229270054] [2021-04-15 02:22:05,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040354142] [2021-04-15 02:22:05,501 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 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 02:22:05,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:22:05,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:05,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:05,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:05,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:05,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:22:05,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783690229] [2021-04-15 02:22:05,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:05,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:05,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:05,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:05,571 INFO L87 Difference]: Start difference. First operand 12614 states and 38633 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 02:22:05,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:05,718 INFO L93 Difference]: Finished difference Result 15242 states and 46024 transitions. [2021-04-15 02:22:05,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:22:05,719 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 22 [2021-04-15 02:22:05,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:05,740 INFO L225 Difference]: With dead ends: 15242 [2021-04-15 02:22:05,741 INFO L226 Difference]: Without dead ends: 15242 [2021-04-15 02:22:05,741 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:22:05,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15242 states. [2021-04-15 02:22:05,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15242 to 6456. [2021-04-15 02:22:05,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6456 states, 6455 states have (on average 3.013787761425252) internal successors, (19454), 6455 states have internal predecessors, (19454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:05,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6456 states to 6456 states and 19454 transitions. [2021-04-15 02:22:05,879 INFO L78 Accepts]: Start accepts. Automaton has 6456 states and 19454 transitions. Word has length 22 [2021-04-15 02:22:05,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:05,880 INFO L480 AbstractCegarLoop]: Abstraction has 6456 states and 19454 transitions. [2021-04-15 02:22:05,880 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 02:22:05,880 INFO L276 IsEmpty]: Start isEmpty. Operand 6456 states and 19454 transitions. [2021-04-15 02:22:05,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:05,885 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:05,885 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:06,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10462 [2021-04-15 02:22:06,086 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:06,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:06,086 INFO L82 PathProgramCache]: Analyzing trace with hash 501084501, now seen corresponding path program 166 times [2021-04-15 02:22:06,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:06,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114075909] [2021-04-15 02:22:06,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:06,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114075909] [2021-04-15 02:22:06,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839337089] [2021-04-15 02:22:06,164 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 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 02:22:06,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:06,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:06,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:06,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:06,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:06,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:22:06,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226930367] [2021-04-15 02:22:06,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:06,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:06,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:06,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:06,233 INFO L87 Difference]: Start difference. First operand 6456 states and 19454 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 02:22:06,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:06,407 INFO L93 Difference]: Finished difference Result 9785 states and 29004 transitions. [2021-04-15 02:22:06,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:22:06,407 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 22 [2021-04-15 02:22:06,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:06,420 INFO L225 Difference]: With dead ends: 9785 [2021-04-15 02:22:06,420 INFO L226 Difference]: Without dead ends: 9785 [2021-04-15 02:22:06,421 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 138.2ms TimeCoverageRelationStatistics Valid=217, Invalid=383, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:22:06,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9785 states. [2021-04-15 02:22:06,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9785 to 6500. [2021-04-15 02:22:06,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6500 states, 6499 states have (on average 3.014002154177566) internal successors, (19588), 6499 states have internal predecessors, (19588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:06,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6500 states to 6500 states and 19588 transitions. [2021-04-15 02:22:06,526 INFO L78 Accepts]: Start accepts. Automaton has 6500 states and 19588 transitions. Word has length 22 [2021-04-15 02:22:06,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:06,526 INFO L480 AbstractCegarLoop]: Abstraction has 6500 states and 19588 transitions. [2021-04-15 02:22:06,526 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 02:22:06,526 INFO L276 IsEmpty]: Start isEmpty. Operand 6500 states and 19588 transitions. [2021-04-15 02:22:06,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:06,531 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:06,531 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:06,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10463,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:06,732 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:06,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:06,732 INFO L82 PathProgramCache]: Analyzing trace with hash -776445359, now seen corresponding path program 167 times [2021-04-15 02:22:06,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:06,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811625431] [2021-04-15 02:22:06,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:06,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:06,788 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:06,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811625431] [2021-04-15 02:22:06,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344105241] [2021-04-15 02:22:06,788 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 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 02:22:06,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:22:06,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:06,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:06,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:06,847 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:06,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:06,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:22:06,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391306672] [2021-04-15 02:22:06,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:06,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:06,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:06,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:06,848 INFO L87 Difference]: Start difference. First operand 6500 states and 19588 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 02:22:07,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:07,015 INFO L93 Difference]: Finished difference Result 6765 states and 19991 transitions. [2021-04-15 02:22:07,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:22:07,015 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 22 [2021-04-15 02:22:07,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:07,023 INFO L225 Difference]: With dead ends: 6765 [2021-04-15 02:22:07,023 INFO L226 Difference]: Without dead ends: 6761 [2021-04-15 02:22:07,023 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=206, Invalid=346, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:22:07,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6761 states. [2021-04-15 02:22:07,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6761 to 6403. [2021-04-15 02:22:07,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6403 states, 6402 states have (on average 3.009215870040612) internal successors, (19265), 6402 states have internal predecessors, (19265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:07,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6403 states to 6403 states and 19265 transitions. [2021-04-15 02:22:07,107 INFO L78 Accepts]: Start accepts. Automaton has 6403 states and 19265 transitions. Word has length 22 [2021-04-15 02:22:07,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:07,107 INFO L480 AbstractCegarLoop]: Abstraction has 6403 states and 19265 transitions. [2021-04-15 02:22:07,107 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 02:22:07,107 INFO L276 IsEmpty]: Start isEmpty. Operand 6403 states and 19265 transitions. [2021-04-15 02:22:07,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:07,112 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:07,113 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:07,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10464 [2021-04-15 02:22:07,313 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:07,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:07,313 INFO L82 PathProgramCache]: Analyzing trace with hash 941303701, now seen corresponding path program 168 times [2021-04-15 02:22:07,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:07,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894613357] [2021-04-15 02:22:07,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:07,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894613357] [2021-04-15 02:22:07,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284455062] [2021-04-15 02:22:07,371 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 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 02:22:07,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:22:07,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:07,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:07,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:07,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:07,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:22:07,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692895660] [2021-04-15 02:22:07,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:07,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:07,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:07,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:07,437 INFO L87 Difference]: Start difference. First operand 6403 states and 19265 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 02:22:07,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:07,517 INFO L93 Difference]: Finished difference Result 6899 states and 20313 transitions. [2021-04-15 02:22:07,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:22:07,517 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 22 [2021-04-15 02:22:07,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:07,523 INFO L225 Difference]: With dead ends: 6899 [2021-04-15 02:22:07,523 INFO L226 Difference]: Without dead ends: 6899 [2021-04-15 02:22:07,523 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:07,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-04-15 02:22:07,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 6402. [2021-04-15 02:22:07,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6402 states, 6401 states have (on average 3.0073426027183254) internal successors, (19250), 6401 states have internal predecessors, (19250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:07,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6402 states to 6402 states and 19250 transitions. [2021-04-15 02:22:07,607 INFO L78 Accepts]: Start accepts. Automaton has 6402 states and 19250 transitions. Word has length 22 [2021-04-15 02:22:07,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:07,607 INFO L480 AbstractCegarLoop]: Abstraction has 6402 states and 19250 transitions. [2021-04-15 02:22:07,607 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 02:22:07,608 INFO L276 IsEmpty]: Start isEmpty. Operand 6402 states and 19250 transitions. [2021-04-15 02:22:07,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:07,613 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:07,613 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:07,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10465 [2021-04-15 02:22:07,813 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:07,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:07,813 INFO L82 PathProgramCache]: Analyzing trace with hash -787743633, now seen corresponding path program 169 times [2021-04-15 02:22:07,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:07,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839366051] [2021-04-15 02:22:07,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:07,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839366051] [2021-04-15 02:22:07,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691394250] [2021-04-15 02:22:07,880 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 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 02:22:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:07,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:07,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:07,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:07,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:22:07,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397672611] [2021-04-15 02:22:07,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:07,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:07,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:07,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:07,960 INFO L87 Difference]: Start difference. First operand 6402 states and 19250 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 02:22:08,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:08,054 INFO L93 Difference]: Finished difference Result 6620 states and 19508 transitions. [2021-04-15 02:22:08,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:22:08,054 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 22 [2021-04-15 02:22:08,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:08,062 INFO L225 Difference]: With dead ends: 6620 [2021-04-15 02:22:08,062 INFO L226 Difference]: Without dead ends: 6620 [2021-04-15 02:22:08,062 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:22:08,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6620 states. [2021-04-15 02:22:08,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6620 to 6370. [2021-04-15 02:22:08,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6370 states, 6369 states have (on average 3.004396294551735) internal successors, (19135), 6369 states have internal predecessors, (19135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:08,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6370 states to 6370 states and 19135 transitions. [2021-04-15 02:22:08,140 INFO L78 Accepts]: Start accepts. Automaton has 6370 states and 19135 transitions. Word has length 22 [2021-04-15 02:22:08,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:08,141 INFO L480 AbstractCegarLoop]: Abstraction has 6370 states and 19135 transitions. [2021-04-15 02:22:08,141 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 02:22:08,141 INFO L276 IsEmpty]: Start isEmpty. Operand 6370 states and 19135 transitions. [2021-04-15 02:22:08,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:08,146 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:08,146 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:08,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10466 [2021-04-15 02:22:08,346 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:08,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:08,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1446363861, now seen corresponding path program 170 times [2021-04-15 02:22:08,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:08,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443554448] [2021-04-15 02:22:08,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:08,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443554448] [2021-04-15 02:22:08,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699198563] [2021-04-15 02:22:08,422 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:08,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:08,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:08,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:08,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:08,510 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:08,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:08,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:22:08,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168033172] [2021-04-15 02:22:08,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:08,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:08,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:08,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:08,511 INFO L87 Difference]: Start difference. First operand 6370 states and 19135 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:08,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:08,630 INFO L93 Difference]: Finished difference Result 7662 states and 22542 transitions. [2021-04-15 02:22:08,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:22:08,631 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:22:08,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:08,643 INFO L225 Difference]: With dead ends: 7662 [2021-04-15 02:22:08,643 INFO L226 Difference]: Without dead ends: 7662 [2021-04-15 02:22:08,643 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:22:08,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7662 states. [2021-04-15 02:22:08,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7662 to 6264. [2021-04-15 02:22:08,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6264 states, 6263 states have (on average 2.9996806642184257) internal successors, (18787), 6263 states have internal predecessors, (18787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:08,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6264 states to 6264 states and 18787 transitions. [2021-04-15 02:22:08,738 INFO L78 Accepts]: Start accepts. Automaton has 6264 states and 18787 transitions. Word has length 22 [2021-04-15 02:22:08,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:08,738 INFO L480 AbstractCegarLoop]: Abstraction has 6264 states and 18787 transitions. [2021-04-15 02:22:08,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:08,738 INFO L276 IsEmpty]: Start isEmpty. Operand 6264 states and 18787 transitions. [2021-04-15 02:22:08,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:08,742 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:08,742 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:08,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10467,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:08,943 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:08,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:08,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1984219439, now seen corresponding path program 171 times [2021-04-15 02:22:08,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:08,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088077567] [2021-04-15 02:22:08,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:08,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:09,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088077567] [2021-04-15 02:22:09,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345751169] [2021-04-15 02:22:09,012 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 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 02:22:09,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:22:09,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:09,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:09,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:09,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:09,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:22:09,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141336948] [2021-04-15 02:22:09,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:09,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:09,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:09,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:09,139 INFO L87 Difference]: Start difference. First operand 6264 states and 18787 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:09,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:09,277 INFO L93 Difference]: Finished difference Result 9995 states and 29712 transitions. [2021-04-15 02:22:09,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:22:09,278 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:22:09,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:09,287 INFO L225 Difference]: With dead ends: 9995 [2021-04-15 02:22:09,288 INFO L226 Difference]: Without dead ends: 9995 [2021-04-15 02:22:09,288 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:22:09,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9995 states. [2021-04-15 02:22:09,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9995 to 7256. [2021-04-15 02:22:09,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7256 states, 7255 states have (on average 3.0132322536181944) internal successors, (21861), 7255 states have internal predecessors, (21861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:09,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7256 states to 7256 states and 21861 transitions. [2021-04-15 02:22:09,384 INFO L78 Accepts]: Start accepts. Automaton has 7256 states and 21861 transitions. Word has length 22 [2021-04-15 02:22:09,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:09,384 INFO L480 AbstractCegarLoop]: Abstraction has 7256 states and 21861 transitions. [2021-04-15 02:22:09,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:09,384 INFO L276 IsEmpty]: Start isEmpty. Operand 7256 states and 21861 transitions. [2021-04-15 02:22:09,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:09,390 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:09,390 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:09,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10468 [2021-04-15 02:22:09,605 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:09,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:09,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1477873173, now seen corresponding path program 172 times [2021-04-15 02:22:09,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:09,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237379618] [2021-04-15 02:22:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:09,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237379618] [2021-04-15 02:22:09,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282344890] [2021-04-15 02:22:09,677 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 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 02:22:09,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:09,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:09,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:09,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:09,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:09,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:22:09,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849060665] [2021-04-15 02:22:09,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:09,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:09,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:09,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:09,752 INFO L87 Difference]: Start difference. First operand 7256 states and 21861 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:09,965 INFO L93 Difference]: Finished difference Result 11660 states and 34640 transitions. [2021-04-15 02:22:09,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:22:09,965 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:22:09,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:09,977 INFO L225 Difference]: With dead ends: 11660 [2021-04-15 02:22:09,977 INFO L226 Difference]: Without dead ends: 11660 [2021-04-15 02:22:09,977 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 173.3ms TimeCoverageRelationStatistics Valid=309, Invalid=561, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:22:09,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11660 states. [2021-04-15 02:22:10,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11660 to 9258. [2021-04-15 02:22:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9258 states, 9257 states have (on average 3.0371610673004215) internal successors, (28115), 9257 states have internal predecessors, (28115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:10,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9258 states to 9258 states and 28115 transitions. [2021-04-15 02:22:10,104 INFO L78 Accepts]: Start accepts. Automaton has 9258 states and 28115 transitions. Word has length 22 [2021-04-15 02:22:10,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:10,105 INFO L480 AbstractCegarLoop]: Abstraction has 9258 states and 28115 transitions. [2021-04-15 02:22:10,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:10,105 INFO L276 IsEmpty]: Start isEmpty. Operand 9258 states and 28115 transitions. [2021-04-15 02:22:10,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:10,112 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:10,112 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:10,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10469,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:10,313 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:10,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:10,313 INFO L82 PathProgramCache]: Analyzing trace with hash -2074645977, now seen corresponding path program 173 times [2021-04-15 02:22:10,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:10,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686566032] [2021-04-15 02:22:10,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:22:10,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686566032] [2021-04-15 02:22:10,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948712302] [2021-04-15 02:22:10,359 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 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 02:22:10,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:22:10,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:10,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:10,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:10,422 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:22:10,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:10,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:22:10,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766986445] [2021-04-15 02:22:10,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:22:10,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:10,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:22:10,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:22:10,423 INFO L87 Difference]: Start difference. First operand 9258 states and 28115 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 02:22:10,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:10,573 INFO L93 Difference]: Finished difference Result 9612 states and 28912 transitions. [2021-04-15 02:22:10,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:22:10,574 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 22 [2021-04-15 02:22:10,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:10,583 INFO L225 Difference]: With dead ends: 9612 [2021-04-15 02:22:10,583 INFO L226 Difference]: Without dead ends: 9608 [2021-04-15 02:22:10,583 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:22:10,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9608 states. [2021-04-15 02:22:10,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9608 to 9445. [2021-04-15 02:22:10,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9445 states, 9444 states have (on average 3.039919525624735) internal successors, (28709), 9444 states have internal predecessors, (28709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:10,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9445 states to 9445 states and 28709 transitions. [2021-04-15 02:22:10,707 INFO L78 Accepts]: Start accepts. Automaton has 9445 states and 28709 transitions. Word has length 22 [2021-04-15 02:22:10,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:10,707 INFO L480 AbstractCegarLoop]: Abstraction has 9445 states and 28709 transitions. [2021-04-15 02:22:10,707 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 02:22:10,707 INFO L276 IsEmpty]: Start isEmpty. Operand 9445 states and 28709 transitions. [2021-04-15 02:22:10,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:10,715 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:10,715 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:10,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10470,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:10,915 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:10,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:10,915 INFO L82 PathProgramCache]: Analyzing trace with hash 367281639, now seen corresponding path program 174 times [2021-04-15 02:22:10,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:10,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724810678] [2021-04-15 02:22:10,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:10,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724810678] [2021-04-15 02:22:10,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830059513] [2021-04-15 02:22:10,979 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 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 02:22:11,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 02:22:11,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:11,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:11,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:11,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:11,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:22:11,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325023946] [2021-04-15 02:22:11,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:11,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:11,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:11,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:11,043 INFO L87 Difference]: Start difference. First operand 9445 states and 28709 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 02:22:11,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:11,212 INFO L93 Difference]: Finished difference Result 12460 states and 37247 transitions. [2021-04-15 02:22:11,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:22:11,212 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 22 [2021-04-15 02:22:11,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:11,230 INFO L225 Difference]: With dead ends: 12460 [2021-04-15 02:22:11,230 INFO L226 Difference]: Without dead ends: 12460 [2021-04-15 02:22:11,230 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=216, Invalid=384, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:22:11,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12460 states. [2021-04-15 02:22:11,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12460 to 9999. [2021-04-15 02:22:11,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9999 states, 9998 states have (on average 3.049109821964393) internal successors, (30485), 9998 states have internal predecessors, (30485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:11,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9999 states to 9999 states and 30485 transitions. [2021-04-15 02:22:11,391 INFO L78 Accepts]: Start accepts. Automaton has 9999 states and 30485 transitions. Word has length 22 [2021-04-15 02:22:11,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:11,391 INFO L480 AbstractCegarLoop]: Abstraction has 9999 states and 30485 transitions. [2021-04-15 02:22:11,391 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 02:22:11,391 INFO L276 IsEmpty]: Start isEmpty. Operand 9999 states and 30485 transitions. [2021-04-15 02:22:11,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:11,398 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:11,398 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:11,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10471 [2021-04-15 02:22:11,599 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:11,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:11,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1850416577, now seen corresponding path program 175 times [2021-04-15 02:22:11,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:11,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90825625] [2021-04-15 02:22:11,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:11,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90825625] [2021-04-15 02:22:11,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3228382] [2021-04-15 02:22:11,675 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 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 02:22:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:11,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:11,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:11,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:11,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:22:11,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217090948] [2021-04-15 02:22:11,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:11,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:11,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:11,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:11,756 INFO L87 Difference]: Start difference. First operand 9999 states and 30485 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:11,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:11,946 INFO L93 Difference]: Finished difference Result 12909 states and 38690 transitions. [2021-04-15 02:22:11,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:22:11,946 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:22:11,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:11,964 INFO L225 Difference]: With dead ends: 12909 [2021-04-15 02:22:11,965 INFO L226 Difference]: Without dead ends: 12909 [2021-04-15 02:22:11,965 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 147.3ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:22:11,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12909 states. [2021-04-15 02:22:12,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12909 to 6060. [2021-04-15 02:22:12,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6060 states, 6059 states have (on average 3.0120481927710845) internal successors, (18250), 6059 states have internal predecessors, (18250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:12,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6060 states to 6060 states and 18250 transitions. [2021-04-15 02:22:12,111 INFO L78 Accepts]: Start accepts. Automaton has 6060 states and 18250 transitions. Word has length 22 [2021-04-15 02:22:12,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:12,112 INFO L480 AbstractCegarLoop]: Abstraction has 6060 states and 18250 transitions. [2021-04-15 02:22:12,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:12,112 INFO L276 IsEmpty]: Start isEmpty. Operand 6060 states and 18250 transitions. [2021-04-15 02:22:12,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:12,118 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:12,118 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:12,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10472,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:12,340 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:12,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:12,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1344070311, now seen corresponding path program 176 times [2021-04-15 02:22:12,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:12,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419177737] [2021-04-15 02:22:12,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:12,408 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:12,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419177737] [2021-04-15 02:22:12,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340337483] [2021-04-15 02:22:12,408 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 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 02:22:12,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:12,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:12,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:12,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:12,477 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:12,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:12,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:22:12,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717031274] [2021-04-15 02:22:12,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:12,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:12,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:12,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:12,478 INFO L87 Difference]: Start difference. First operand 6060 states and 18250 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:12,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:12,701 INFO L93 Difference]: Finished difference Result 9798 states and 28894 transitions. [2021-04-15 02:22:12,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:22:12,701 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:22:12,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:12,714 INFO L225 Difference]: With dead ends: 9798 [2021-04-15 02:22:12,714 INFO L226 Difference]: Without dead ends: 9798 [2021-04-15 02:22:12,714 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 171.3ms TimeCoverageRelationStatistics Valid=308, Invalid=562, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:22:12,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9798 states. [2021-04-15 02:22:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9798 to 5868. [2021-04-15 02:22:12,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5868 states, 5867 states have (on average 3.0093744673598093) internal successors, (17656), 5867 states have internal predecessors, (17656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:12,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5868 states to 5868 states and 17656 transitions. [2021-04-15 02:22:12,811 INFO L78 Accepts]: Start accepts. Automaton has 5868 states and 17656 transitions. Word has length 22 [2021-04-15 02:22:12,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:12,811 INFO L480 AbstractCegarLoop]: Abstraction has 5868 states and 17656 transitions. [2021-04-15 02:22:12,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:12,811 INFO L276 IsEmpty]: Start isEmpty. Operand 5868 states and 17656 transitions. [2021-04-15 02:22:12,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:12,815 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:12,815 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:13,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10473 [2021-04-15 02:22:13,016 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:13,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:13,016 INFO L82 PathProgramCache]: Analyzing trace with hash 2117261897, now seen corresponding path program 177 times [2021-04-15 02:22:13,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:13,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477828609] [2021-04-15 02:22:13,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:13,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477828609] [2021-04-15 02:22:13,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766831379] [2021-04-15 02:22:13,071 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 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 02:22:13,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:22:13,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:13,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:13,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:13,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:13,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:22:13,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654900963] [2021-04-15 02:22:13,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:13,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:13,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:13,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:13,133 INFO L87 Difference]: Start difference. First operand 5868 states and 17656 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 02:22:13,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:13,289 INFO L93 Difference]: Finished difference Result 6116 states and 18033 transitions. [2021-04-15 02:22:13,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:22:13,290 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 22 [2021-04-15 02:22:13,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:13,295 INFO L225 Difference]: With dead ends: 6116 [2021-04-15 02:22:13,295 INFO L226 Difference]: Without dead ends: 6112 [2021-04-15 02:22:13,295 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=205, Invalid=347, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:22:13,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6112 states. [2021-04-15 02:22:13,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6112 to 5813. [2021-04-15 02:22:13,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5813 states, 5812 states have (on average 3.0051617343427393) internal successors, (17466), 5812 states have internal predecessors, (17466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:13,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5813 states to 5813 states and 17466 transitions. [2021-04-15 02:22:13,358 INFO L78 Accepts]: Start accepts. Automaton has 5813 states and 17466 transitions. Word has length 22 [2021-04-15 02:22:13,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:13,358 INFO L480 AbstractCegarLoop]: Abstraction has 5813 states and 17466 transitions. [2021-04-15 02:22:13,358 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 02:22:13,359 INFO L276 IsEmpty]: Start isEmpty. Operand 5813 states and 17466 transitions. [2021-04-15 02:22:13,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:13,363 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:13,363 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:13,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10474 [2021-04-15 02:22:13,564 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:13,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:13,564 INFO L82 PathProgramCache]: Analyzing trace with hash -459956339, now seen corresponding path program 178 times [2021-04-15 02:22:13,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:13,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114254969] [2021-04-15 02:22:13,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:13,618 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:13,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114254969] [2021-04-15 02:22:13,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873075014] [2021-04-15 02:22:13,619 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 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 02:22:13,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:13,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:13,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:13,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:13,680 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:13,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:13,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:22:13,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126789592] [2021-04-15 02:22:13,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:13,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:13,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:13,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:13,681 INFO L87 Difference]: Start difference. First operand 5813 states and 17466 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 02:22:13,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:13,768 INFO L93 Difference]: Finished difference Result 6374 states and 18724 transitions. [2021-04-15 02:22:13,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:22:13,768 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 22 [2021-04-15 02:22:13,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:13,775 INFO L225 Difference]: With dead ends: 6374 [2021-04-15 02:22:13,776 INFO L226 Difference]: Without dead ends: 6374 [2021-04-15 02:22:13,776 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=114, Invalid=158, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:22:13,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6374 states. [2021-04-15 02:22:13,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6374 to 5821. [2021-04-15 02:22:13,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 3.004982817869416) internal successors, (17489), 5820 states have internal predecessors, (17489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:13,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 17489 transitions. [2021-04-15 02:22:13,850 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 17489 transitions. Word has length 22 [2021-04-15 02:22:13,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:13,850 INFO L480 AbstractCegarLoop]: Abstraction has 5821 states and 17489 transitions. [2021-04-15 02:22:13,850 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 02:22:13,850 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 17489 transitions. [2021-04-15 02:22:13,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:13,854 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:13,854 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:14,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10475 [2021-04-15 02:22:14,055 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:14,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:14,055 INFO L82 PathProgramCache]: Analyzing trace with hash 2105963623, now seen corresponding path program 179 times [2021-04-15 02:22:14,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:14,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077539819] [2021-04-15 02:22:14,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:14,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077539819] [2021-04-15 02:22:14,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605201400] [2021-04-15 02:22:14,116 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 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 02:22:14,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:22:14,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:14,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:14,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:14,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:14,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:22:14,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765725201] [2021-04-15 02:22:14,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:14,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:14,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:14,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:14,197 INFO L87 Difference]: Start difference. First operand 5821 states and 17489 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 02:22:14,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:14,300 INFO L93 Difference]: Finished difference Result 6454 states and 18955 transitions. [2021-04-15 02:22:14,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:22:14,301 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 22 [2021-04-15 02:22:14,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:14,308 INFO L225 Difference]: With dead ends: 6454 [2021-04-15 02:22:14,308 INFO L226 Difference]: Without dead ends: 6454 [2021-04-15 02:22:14,309 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:22:14,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6454 states. [2021-04-15 02:22:14,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6454 to 5751. [2021-04-15 02:22:14,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5751 states, 5750 states have (on average 3.001391304347826) internal successors, (17258), 5750 states have internal predecessors, (17258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:14,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5751 states to 5751 states and 17258 transitions. [2021-04-15 02:22:14,382 INFO L78 Accepts]: Start accepts. Automaton has 5751 states and 17258 transitions. Word has length 22 [2021-04-15 02:22:14,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:14,382 INFO L480 AbstractCegarLoop]: Abstraction has 5751 states and 17258 transitions. [2021-04-15 02:22:14,382 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 02:22:14,382 INFO L276 IsEmpty]: Start isEmpty. Operand 5751 states and 17258 transitions. [2021-04-15 02:22:14,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:14,385 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:14,385 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:14,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10476 [2021-04-15 02:22:14,586 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:14,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:14,586 INFO L82 PathProgramCache]: Analyzing trace with hash 45103821, now seen corresponding path program 180 times [2021-04-15 02:22:14,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:14,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61735909] [2021-04-15 02:22:14,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:14,645 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:14,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61735909] [2021-04-15 02:22:14,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141981394] [2021-04-15 02:22:14,645 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 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 02:22:14,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:22:14,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:14,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:14,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:14,715 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:14,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:14,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:22:14,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373265863] [2021-04-15 02:22:14,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:14,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:14,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:14,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:14,716 INFO L87 Difference]: Start difference. First operand 5751 states and 17258 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 02:22:14,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:14,813 INFO L93 Difference]: Finished difference Result 9965 states and 29813 transitions. [2021-04-15 02:22:14,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:22:14,814 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 22 [2021-04-15 02:22:14,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:14,826 INFO L225 Difference]: With dead ends: 9965 [2021-04-15 02:22:14,826 INFO L226 Difference]: Without dead ends: 9965 [2021-04-15 02:22:14,826 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:22:14,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9965 states. [2021-04-15 02:22:14,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9965 to 9679. [2021-04-15 02:22:14,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9679 states, 9678 states have (on average 3.0377144038024384) internal successors, (29399), 9678 states have internal predecessors, (29399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:14,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9679 states to 9679 states and 29399 transitions. [2021-04-15 02:22:14,948 INFO L78 Accepts]: Start accepts. Automaton has 9679 states and 29399 transitions. Word has length 22 [2021-04-15 02:22:14,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:14,948 INFO L480 AbstractCegarLoop]: Abstraction has 9679 states and 29399 transitions. [2021-04-15 02:22:14,948 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 02:22:14,949 INFO L276 IsEmpty]: Start isEmpty. Operand 9679 states and 29399 transitions. [2021-04-15 02:22:15,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:15,000 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:15,000 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:15,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10477,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:15,201 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:15,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:15,201 INFO L82 PathProgramCache]: Analyzing trace with hash 582959399, now seen corresponding path program 181 times [2021-04-15 02:22:15,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:15,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513721973] [2021-04-15 02:22:15,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:15,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513721973] [2021-04-15 02:22:15,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970445135] [2021-04-15 02:22:15,267 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 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 02:22:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:15,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:15,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:15,335 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:15,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:15,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:22:15,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507397814] [2021-04-15 02:22:15,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:15,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:15,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:15,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:15,336 INFO L87 Difference]: Start difference. First operand 9679 states and 29399 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:15,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:15,473 INFO L93 Difference]: Finished difference Result 10632 states and 31706 transitions. [2021-04-15 02:22:15,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:22:15,474 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:22:15,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:15,487 INFO L225 Difference]: With dead ends: 10632 [2021-04-15 02:22:15,487 INFO L226 Difference]: Without dead ends: 10632 [2021-04-15 02:22:15,488 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:22:15,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2021-04-15 02:22:15,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 8622. [2021-04-15 02:22:15,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8622 states, 8621 states have (on average 3.030506901751537) internal successors, (26126), 8621 states have internal predecessors, (26126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:15,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8622 states to 8622 states and 26126 transitions. [2021-04-15 02:22:15,611 INFO L78 Accepts]: Start accepts. Automaton has 8622 states and 26126 transitions. Word has length 22 [2021-04-15 02:22:15,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:15,612 INFO L480 AbstractCegarLoop]: Abstraction has 8622 states and 26126 transitions. [2021-04-15 02:22:15,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:15,612 INFO L276 IsEmpty]: Start isEmpty. Operand 8622 states and 26126 transitions. [2021-04-15 02:22:15,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:15,617 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:15,617 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:15,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10478 [2021-04-15 02:22:15,817 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:15,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:15,818 INFO L82 PathProgramCache]: Analyzing trace with hash 76613133, now seen corresponding path program 182 times [2021-04-15 02:22:15,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:15,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389825797] [2021-04-15 02:22:15,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:15,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:15,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389825797] [2021-04-15 02:22:15,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153449995] [2021-04-15 02:22:15,888 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 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 02:22:15,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:15,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:15,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:15,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:15,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:15,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:22:15,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340953435] [2021-04-15 02:22:15,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:15,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:15,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:15,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:15,960 INFO L87 Difference]: Start difference. First operand 8622 states and 26126 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:16,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:16,143 INFO L93 Difference]: Finished difference Result 14571 states and 43929 transitions. [2021-04-15 02:22:16,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:22:16,144 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:22:16,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:16,160 INFO L225 Difference]: With dead ends: 14571 [2021-04-15 02:22:16,160 INFO L226 Difference]: Without dead ends: 14571 [2021-04-15 02:22:16,160 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 140.8ms TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:22:16,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14571 states. [2021-04-15 02:22:16,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14571 to 13534. [2021-04-15 02:22:16,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13534 states, 13533 states have (on average 3.05660237936895) internal successors, (41365), 13533 states have internal predecessors, (41365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:16,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13534 states to 13534 states and 41365 transitions. [2021-04-15 02:22:16,339 INFO L78 Accepts]: Start accepts. Automaton has 13534 states and 41365 transitions. Word has length 22 [2021-04-15 02:22:16,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:16,339 INFO L480 AbstractCegarLoop]: Abstraction has 13534 states and 41365 transitions. [2021-04-15 02:22:16,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:16,340 INFO L276 IsEmpty]: Start isEmpty. Operand 13534 states and 41365 transitions. [2021-04-15 02:22:16,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:16,347 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:16,348 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:16,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10479 [2021-04-15 02:22:16,548 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:16,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:16,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1559748071, now seen corresponding path program 183 times [2021-04-15 02:22:16,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:16,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91643923] [2021-04-15 02:22:16,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:16,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91643923] [2021-04-15 02:22:16,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752875065] [2021-04-15 02:22:16,621 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 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 02:22:16,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:22:16,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:16,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:16,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:16,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:16,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:22:16,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674034325] [2021-04-15 02:22:16,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:16,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:16,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:16,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:16,708 INFO L87 Difference]: Start difference. First operand 13534 states and 41365 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:16,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:16,992 INFO L93 Difference]: Finished difference Result 19456 states and 59104 transitions. [2021-04-15 02:22:16,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:22:16,993 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:22:16,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:17,016 INFO L225 Difference]: With dead ends: 19456 [2021-04-15 02:22:17,016 INFO L226 Difference]: Without dead ends: 19456 [2021-04-15 02:22:17,017 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 221.7ms TimeCoverageRelationStatistics Valid=411, Invalid=779, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:22:17,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19456 states. [2021-04-15 02:22:17,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19456 to 17545. [2021-04-15 02:22:17,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17545 states, 17544 states have (on average 3.0747264021887823) internal successors, (53943), 17544 states have internal predecessors, (53943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17545 states to 17545 states and 53943 transitions. [2021-04-15 02:22:17,286 INFO L78 Accepts]: Start accepts. Automaton has 17545 states and 53943 transitions. Word has length 22 [2021-04-15 02:22:17,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:17,286 INFO L480 AbstractCegarLoop]: Abstraction has 17545 states and 53943 transitions. [2021-04-15 02:22:17,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:17,286 INFO L276 IsEmpty]: Start isEmpty. Operand 17545 states and 53943 transitions. [2021-04-15 02:22:17,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:17,295 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:17,295 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:17,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10480,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:17,496 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:17,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:17,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1491148885, now seen corresponding path program 184 times [2021-04-15 02:22:17,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:17,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484399090] [2021-04-15 02:22:17,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:17,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484399090] [2021-04-15 02:22:17,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489152230] [2021-04-15 02:22:17,578 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:17,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:17,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:17,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:17,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:17,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:17,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:22:17,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999229093] [2021-04-15 02:22:17,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:17,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:17,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:17,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:17,663 INFO L87 Difference]: Start difference. First operand 17545 states and 53943 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:17,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:17,916 INFO L93 Difference]: Finished difference Result 24132 states and 73287 transitions. [2021-04-15 02:22:17,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:22:17,917 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:22:17,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:17,954 INFO L225 Difference]: With dead ends: 24132 [2021-04-15 02:22:17,954 INFO L226 Difference]: Without dead ends: 24132 [2021-04-15 02:22:17,955 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 174.3ms TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:22:17,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24132 states. [2021-04-15 02:22:18,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24132 to 13806. [2021-04-15 02:22:18,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13806 states, 13805 states have (on average 3.0678739587106123) internal successors, (42352), 13805 states have internal predecessors, (42352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:18,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13806 states to 13806 states and 42352 transitions. [2021-04-15 02:22:18,242 INFO L78 Accepts]: Start accepts. Automaton has 13806 states and 42352 transitions. Word has length 22 [2021-04-15 02:22:18,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:18,242 INFO L480 AbstractCegarLoop]: Abstraction has 13806 states and 42352 transitions. [2021-04-15 02:22:18,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:18,242 INFO L276 IsEmpty]: Start isEmpty. Operand 13806 states and 42352 transitions. [2021-04-15 02:22:18,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:18,251 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:18,251 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:18,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10481,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:18,451 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:18,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:18,452 INFO L82 PathProgramCache]: Analyzing trace with hash 223691707, now seen corresponding path program 185 times [2021-04-15 02:22:18,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:18,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584266693] [2021-04-15 02:22:18,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:18,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:18,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584266693] [2021-04-15 02:22:18,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507912505] [2021-04-15 02:22:18,526 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 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 02:22:18,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:22:18,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:18,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:18,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:18,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:18,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:22:18,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494331458] [2021-04-15 02:22:18,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:18,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:18,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:18,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:18,590 INFO L87 Difference]: Start difference. First operand 13806 states and 42352 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:18,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:18,821 INFO L93 Difference]: Finished difference Result 20948 states and 63957 transitions. [2021-04-15 02:22:18,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:22:18,821 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:22:18,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:18,853 INFO L225 Difference]: With dead ends: 20948 [2021-04-15 02:22:18,853 INFO L226 Difference]: Without dead ends: 20948 [2021-04-15 02:22:18,854 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 152.4ms TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:22:18,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20948 states. [2021-04-15 02:22:19,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20948 to 19052. [2021-04-15 02:22:19,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19052 states, 19051 states have (on average 3.0863996640596296) internal successors, (58799), 19051 states have internal predecessors, (58799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:19,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19052 states to 19052 states and 58799 transitions. [2021-04-15 02:22:19,141 INFO L78 Accepts]: Start accepts. Automaton has 19052 states and 58799 transitions. Word has length 22 [2021-04-15 02:22:19,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:19,141 INFO L480 AbstractCegarLoop]: Abstraction has 19052 states and 58799 transitions. [2021-04-15 02:22:19,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:19,141 INFO L276 IsEmpty]: Start isEmpty. Operand 19052 states and 58799 transitions. [2021-04-15 02:22:19,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:19,149 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:19,150 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:19,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10482,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:19,350 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:19,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:19,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1706826645, now seen corresponding path program 186 times [2021-04-15 02:22:19,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:19,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466254333] [2021-04-15 02:22:19,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:19,423 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:19,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466254333] [2021-04-15 02:22:19,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491860749] [2021-04-15 02:22:19,423 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 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 02:22:19,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:22:19,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:19,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:19,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:19,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:19,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:22:19,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45198443] [2021-04-15 02:22:19,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:19,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:19,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:19,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:19,485 INFO L87 Difference]: Start difference. First operand 19052 states and 58799 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:19,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:19,810 INFO L93 Difference]: Finished difference Result 28543 states and 87595 transitions. [2021-04-15 02:22:19,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:22:19,810 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:22:19,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:19,854 INFO L225 Difference]: With dead ends: 28543 [2021-04-15 02:22:19,855 INFO L226 Difference]: Without dead ends: 28543 [2021-04-15 02:22:19,855 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 232.4ms TimeCoverageRelationStatistics Valid=410, Invalid=780, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:22:19,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28543 states. [2021-04-15 02:22:20,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28543 to 26854. [2021-04-15 02:22:20,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26854 states, 26853 states have (on average 3.0954455740513165) internal successors, (83122), 26853 states have internal predecessors, (83122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:20,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26854 states to 26854 states and 83122 transitions. [2021-04-15 02:22:20,373 INFO L78 Accepts]: Start accepts. Automaton has 26854 states and 83122 transitions. Word has length 22 [2021-04-15 02:22:20,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:20,374 INFO L480 AbstractCegarLoop]: Abstraction has 26854 states and 83122 transitions. [2021-04-15 02:22:20,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:20,374 INFO L276 IsEmpty]: Start isEmpty. Operand 26854 states and 83122 transitions. [2021-04-15 02:22:20,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:20,383 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:20,384 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:20,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10483,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:20,584 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:20,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:20,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1627873617, now seen corresponding path program 187 times [2021-04-15 02:22:20,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:20,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927574365] [2021-04-15 02:22:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:20,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927574365] [2021-04-15 02:22:20,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531197808] [2021-04-15 02:22:20,640 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 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 02:22:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:20,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:20,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:20,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:20,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:22:20,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464452061] [2021-04-15 02:22:20,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:20,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:20,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:20,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:20,698 INFO L87 Difference]: Start difference. First operand 26854 states and 83122 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 02:22:20,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:20,938 INFO L93 Difference]: Finished difference Result 27245 states and 83974 transitions. [2021-04-15 02:22:20,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:22:20,938 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 22 [2021-04-15 02:22:20,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:20,985 INFO L225 Difference]: With dead ends: 27245 [2021-04-15 02:22:20,985 INFO L226 Difference]: Without dead ends: 27241 [2021-04-15 02:22:20,985 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=204, Invalid=348, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:22:21,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27241 states. [2021-04-15 02:22:21,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27241 to 25289. [2021-04-15 02:22:21,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25289 states, 25288 states have (on average 3.0879863967099017) internal successors, (78089), 25288 states have internal predecessors, (78089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:21,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25289 states to 25289 states and 78089 transitions. [2021-04-15 02:22:21,419 INFO L78 Accepts]: Start accepts. Automaton has 25289 states and 78089 transitions. Word has length 22 [2021-04-15 02:22:21,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:21,419 INFO L480 AbstractCegarLoop]: Abstraction has 25289 states and 78089 transitions. [2021-04-15 02:22:21,419 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 02:22:21,419 INFO L276 IsEmpty]: Start isEmpty. Operand 25289 states and 78089 transitions. [2021-04-15 02:22:21,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:21,428 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:21,428 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:21,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10484,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:21,629 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:21,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:21,630 INFO L82 PathProgramCache]: Analyzing trace with hash -949344619, now seen corresponding path program 188 times [2021-04-15 02:22:21,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:21,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939118514] [2021-04-15 02:22:21,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:21,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939118514] [2021-04-15 02:22:21,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290688589] [2021-04-15 02:22:21,687 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 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 02:22:21,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:21,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:21,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:21,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:21,752 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:21,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:21,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:22:21,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730218435] [2021-04-15 02:22:21,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:21,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:21,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:21,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:21,753 INFO L87 Difference]: Start difference. First operand 25289 states and 78089 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 02:22:21,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:21,912 INFO L93 Difference]: Finished difference Result 27144 states and 83198 transitions. [2021-04-15 02:22:21,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:22:21,913 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 22 [2021-04-15 02:22:21,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:21,953 INFO L225 Difference]: With dead ends: 27144 [2021-04-15 02:22:21,954 INFO L226 Difference]: Without dead ends: 27144 [2021-04-15 02:22:21,954 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:22:21,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27144 states. [2021-04-15 02:22:22,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27144 to 25336. [2021-04-15 02:22:22,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25336 states, 25335 states have (on average 3.08656009473061) internal successors, (78198), 25335 states have internal predecessors, (78198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:22,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25336 states to 25336 states and 78198 transitions. [2021-04-15 02:22:22,431 INFO L78 Accepts]: Start accepts. Automaton has 25336 states and 78198 transitions. Word has length 22 [2021-04-15 02:22:22,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:22,432 INFO L480 AbstractCegarLoop]: Abstraction has 25336 states and 78198 transitions. [2021-04-15 02:22:22,432 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 02:22:22,432 INFO L276 IsEmpty]: Start isEmpty. Operand 25336 states and 78198 transitions. [2021-04-15 02:22:22,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:22,443 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:22,443 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:22,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10485 [2021-04-15 02:22:22,645 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:22,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:22,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1616575343, now seen corresponding path program 189 times [2021-04-15 02:22:22,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:22,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964917732] [2021-04-15 02:22:22,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:22,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964917732] [2021-04-15 02:22:22,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820517484] [2021-04-15 02:22:22,706 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 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 02:22:22,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:22:22,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:22,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:22,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:22,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:22,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:22:22,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097917210] [2021-04-15 02:22:22,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:22,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:22,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:22,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:22,774 INFO L87 Difference]: Start difference. First operand 25336 states and 78198 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 02:22:22,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:22,967 INFO L93 Difference]: Finished difference Result 28314 states and 86669 transitions. [2021-04-15 02:22:22,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:22:22,968 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 22 [2021-04-15 02:22:22,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:23,016 INFO L225 Difference]: With dead ends: 28314 [2021-04-15 02:22:23,016 INFO L226 Difference]: Without dead ends: 28314 [2021-04-15 02:22:23,017 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=163, Invalid=257, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:22:23,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28314 states. [2021-04-15 02:22:23,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28314 to 22217. [2021-04-15 02:22:23,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22217 states, 22216 states have (on average 3.076026287360461) internal successors, (68337), 22216 states have internal predecessors, (68337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:23,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22217 states to 22217 states and 68337 transitions. [2021-04-15 02:22:23,429 INFO L78 Accepts]: Start accepts. Automaton has 22217 states and 68337 transitions. Word has length 22 [2021-04-15 02:22:23,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:23,430 INFO L480 AbstractCegarLoop]: Abstraction has 22217 states and 68337 transitions. [2021-04-15 02:22:23,430 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 02:22:23,430 INFO L276 IsEmpty]: Start isEmpty. Operand 22217 states and 68337 transitions. [2021-04-15 02:22:23,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:23,439 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:23,439 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:23,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10486 [2021-04-15 02:22:23,639 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:23,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:23,640 INFO L82 PathProgramCache]: Analyzing trace with hash -444284459, now seen corresponding path program 190 times [2021-04-15 02:22:23,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:23,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57013863] [2021-04-15 02:22:23,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:23,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57013863] [2021-04-15 02:22:23,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918145098] [2021-04-15 02:22:23,703 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 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 02:22:23,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:23,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:23,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:23,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:23,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:23,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:22:23,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848699076] [2021-04-15 02:22:23,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:23,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:23,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:23,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:23,771 INFO L87 Difference]: Start difference. First operand 22217 states and 68337 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 02:22:23,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:23,974 INFO L93 Difference]: Finished difference Result 40934 states and 126275 transitions. [2021-04-15 02:22:23,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:22:23,975 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 22 [2021-04-15 02:22:23,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:24,045 INFO L225 Difference]: With dead ends: 40934 [2021-04-15 02:22:24,045 INFO L226 Difference]: Without dead ends: 40934 [2021-04-15 02:22:24,046 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:22:24,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40934 states. [2021-04-15 02:22:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40934 to 32281. [2021-04-15 02:22:24,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32281 states, 32280 states have (on average 3.1012391573729863) internal successors, (100108), 32280 states have internal predecessors, (100108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:24,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32281 states to 32281 states and 100108 transitions. [2021-04-15 02:22:24,731 INFO L78 Accepts]: Start accepts. Automaton has 32281 states and 100108 transitions. Word has length 22 [2021-04-15 02:22:24,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:24,731 INFO L480 AbstractCegarLoop]: Abstraction has 32281 states and 100108 transitions. [2021-04-15 02:22:24,731 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 02:22:24,731 INFO L276 IsEmpty]: Start isEmpty. Operand 32281 states and 100108 transitions. [2021-04-15 02:22:24,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:24,740 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:24,740 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:24,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10487 [2021-04-15 02:22:24,941 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:24,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:24,941 INFO L82 PathProgramCache]: Analyzing trace with hash 93571119, now seen corresponding path program 191 times [2021-04-15 02:22:24,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:24,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537139366] [2021-04-15 02:22:24,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:24,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:25,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537139366] [2021-04-15 02:22:25,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982892606] [2021-04-15 02:22:25,007 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 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 02:22:25,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:22:25,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:25,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:25,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:25,079 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:25,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:25,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:22:25,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585515193] [2021-04-15 02:22:25,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:25,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:25,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:25,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:25,079 INFO L87 Difference]: Start difference. First operand 32281 states and 100108 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 02:22:25,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:25,291 INFO L93 Difference]: Finished difference Result 45762 states and 141598 transitions. [2021-04-15 02:22:25,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:22:25,292 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 22 [2021-04-15 02:22:25,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:25,371 INFO L225 Difference]: With dead ends: 45762 [2021-04-15 02:22:25,371 INFO L226 Difference]: Without dead ends: 45762 [2021-04-15 02:22:25,371 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:22:25,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45762 states. [2021-04-15 02:22:25,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45762 to 45505. [2021-04-15 02:22:26,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45505 states, 45504 states have (on average 3.1023426511954995) internal successors, (141169), 45504 states have internal predecessors, (141169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:26,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45505 states to 45505 states and 141169 transitions. [2021-04-15 02:22:26,144 INFO L78 Accepts]: Start accepts. Automaton has 45505 states and 141169 transitions. Word has length 22 [2021-04-15 02:22:26,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:26,144 INFO L480 AbstractCegarLoop]: Abstraction has 45505 states and 141169 transitions. [2021-04-15 02:22:26,144 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 02:22:26,145 INFO L276 IsEmpty]: Start isEmpty. Operand 45505 states and 141169 transitions. [2021-04-15 02:22:26,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:26,159 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:26,159 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:26,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10488 [2021-04-15 02:22:26,359 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:26,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:26,360 INFO L82 PathProgramCache]: Analyzing trace with hash -412775147, now seen corresponding path program 192 times [2021-04-15 02:22:26,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:26,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23221616] [2021-04-15 02:22:26,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:26,432 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:26,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23221616] [2021-04-15 02:22:26,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375564715] [2021-04-15 02:22:26,432 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 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 02:22:26,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:22:26,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:26,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:26,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:26,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:26,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:22:26,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735602141] [2021-04-15 02:22:26,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:26,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:26,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:26,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:26,497 INFO L87 Difference]: Start difference. First operand 45505 states and 141169 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:26,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:26,744 INFO L93 Difference]: Finished difference Result 46432 states and 143526 transitions. [2021-04-15 02:22:26,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:22:26,745 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:22:26,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:26,824 INFO L225 Difference]: With dead ends: 46432 [2021-04-15 02:22:26,824 INFO L226 Difference]: Without dead ends: 46432 [2021-04-15 02:22:26,824 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:22:26,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46432 states. [2021-04-15 02:22:27,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46432 to 45128. [2021-04-15 02:22:27,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45128 states, 45127 states have (on average 3.1029317260176836) internal successors, (140026), 45127 states have internal predecessors, (140026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:27,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45128 states to 45128 states and 140026 transitions. [2021-04-15 02:22:27,884 INFO L78 Accepts]: Start accepts. Automaton has 45128 states and 140026 transitions. Word has length 22 [2021-04-15 02:22:27,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:27,884 INFO L480 AbstractCegarLoop]: Abstraction has 45128 states and 140026 transitions. [2021-04-15 02:22:27,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:27,885 INFO L276 IsEmpty]: Start isEmpty. Operand 45128 states and 140026 transitions. [2021-04-15 02:22:27,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:27,898 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:27,898 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:28,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10489,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:28,099 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:28,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:28,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1070359791, now seen corresponding path program 193 times [2021-04-15 02:22:28,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:28,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906835886] [2021-04-15 02:22:28,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:28,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:28,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906835886] [2021-04-15 02:22:28,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268454566] [2021-04-15 02:22:28,174 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 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 02:22:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:28,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:28,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:28,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:28,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:22:28,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820555568] [2021-04-15 02:22:28,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:28,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:28,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:28,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:28,236 INFO L87 Difference]: Start difference. First operand 45128 states and 140026 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:28,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:28,575 INFO L93 Difference]: Finished difference Result 49791 states and 153978 transitions. [2021-04-15 02:22:28,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:22:28,576 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:22:28,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:28,674 INFO L225 Difference]: With dead ends: 49791 [2021-04-15 02:22:28,674 INFO L226 Difference]: Without dead ends: 49791 [2021-04-15 02:22:28,674 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 173.9ms TimeCoverageRelationStatistics Valid=285, Invalid=585, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:22:28,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49791 states. [2021-04-15 02:22:29,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49791 to 49280. [2021-04-15 02:22:29,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49280 states, 49279 states have (on average 3.102295095273849) internal successors, (152878), 49279 states have internal predecessors, (152878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:29,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49280 states to 49280 states and 152878 transitions. [2021-04-15 02:22:29,837 INFO L78 Accepts]: Start accepts. Automaton has 49280 states and 152878 transitions. Word has length 22 [2021-04-15 02:22:29,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:29,837 INFO L480 AbstractCegarLoop]: Abstraction has 49280 states and 152878 transitions. [2021-04-15 02:22:29,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:29,837 INFO L276 IsEmpty]: Start isEmpty. Operand 49280 states and 152878 transitions. [2021-04-15 02:22:29,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:29,853 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:29,853 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:30,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10490 [2021-04-15 02:22:30,053 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:30,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:30,054 INFO L82 PathProgramCache]: Analyzing trace with hash -197097387, now seen corresponding path program 194 times [2021-04-15 02:22:30,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:30,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088582549] [2021-04-15 02:22:30,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:30,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088582549] [2021-04-15 02:22:30,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419498936] [2021-04-15 02:22:30,432 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 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 02:22:30,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:30,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:30,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:30,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:30,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:30,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:22:30,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209359417] [2021-04-15 02:22:30,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:30,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:30,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:30,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:30,495 INFO L87 Difference]: Start difference. First operand 49280 states and 152878 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:31,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:31,042 INFO L93 Difference]: Finished difference Result 52302 states and 161626 transitions. [2021-04-15 02:22:31,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:22:31,042 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:22:31,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:31,162 INFO L225 Difference]: With dead ends: 52302 [2021-04-15 02:22:31,162 INFO L226 Difference]: Without dead ends: 52302 [2021-04-15 02:22:31,162 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 321.0ms TimeCoverageRelationStatistics Valid=525, Invalid=1035, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 02:22:31,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52302 states. [2021-04-15 02:22:32,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52302 to 51634. [2021-04-15 02:22:32,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51634 states, 51633 states have (on average 3.101311176960471) internal successors, (160130), 51633 states have internal predecessors, (160130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:32,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51634 states to 51634 states and 160130 transitions. [2021-04-15 02:22:32,292 INFO L78 Accepts]: Start accepts. Automaton has 51634 states and 160130 transitions. Word has length 22 [2021-04-15 02:22:32,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:32,292 INFO L480 AbstractCegarLoop]: Abstraction has 51634 states and 160130 transitions. [2021-04-15 02:22:32,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:32,292 INFO L276 IsEmpty]: Start isEmpty. Operand 51634 states and 160130 transitions. [2021-04-15 02:22:32,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:32,478 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:32,478 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:32,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10491,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:32,679 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:32,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:32,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1546669833, now seen corresponding path program 195 times [2021-04-15 02:22:32,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:32,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733753128] [2021-04-15 02:22:32,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:32,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733753128] [2021-04-15 02:22:32,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580122763] [2021-04-15 02:22:32,742 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 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 02:22:32,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:22:32,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:32,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:32,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:22:32,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:32,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:22:32,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606487021] [2021-04-15 02:22:32,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:32,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:32,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:32,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:32,803 INFO L87 Difference]: Start difference. First operand 51634 states and 160130 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 02:22:33,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:33,321 INFO L93 Difference]: Finished difference Result 52382 states and 162119 transitions. [2021-04-15 02:22:33,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:22:33,321 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 22 [2021-04-15 02:22:33,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:33,421 INFO L225 Difference]: With dead ends: 52382 [2021-04-15 02:22:33,421 INFO L226 Difference]: Without dead ends: 52376 [2021-04-15 02:22:33,422 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 162.1ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:22:33,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52376 states. [2021-04-15 02:22:34,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52376 to 52177. [2021-04-15 02:22:34,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52177 states, 52176 states have (on average 3.102135081263416) internal successors, (161857), 52176 states have internal predecessors, (161857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:34,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52177 states to 52177 states and 161857 transitions. [2021-04-15 02:22:34,537 INFO L78 Accepts]: Start accepts. Automaton has 52177 states and 161857 transitions. Word has length 22 [2021-04-15 02:22:34,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:34,537 INFO L480 AbstractCegarLoop]: Abstraction has 52177 states and 161857 transitions. [2021-04-15 02:22:34,537 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 02:22:34,537 INFO L276 IsEmpty]: Start isEmpty. Operand 52177 states and 161857 transitions. [2021-04-15 02:22:34,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:34,559 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:34,559 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:34,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10492,197 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:34,760 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:34,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:34,760 INFO L82 PathProgramCache]: Analyzing trace with hash 471577549, now seen corresponding path program 196 times [2021-04-15 02:22:34,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:34,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540511301] [2021-04-15 02:22:34,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:34,835 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:34,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540511301] [2021-04-15 02:22:34,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042253378] [2021-04-15 02:22:34,836 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:34,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:34,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:34,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:34,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:22:34,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:34,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:22:34,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374754582] [2021-04-15 02:22:34,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:34,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:34,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:34,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:34,921 INFO L87 Difference]: Start difference. First operand 52177 states and 161857 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 02:22:35,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:35,538 INFO L93 Difference]: Finished difference Result 71897 states and 222309 transitions. [2021-04-15 02:22:35,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:22:35,539 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 22 [2021-04-15 02:22:35,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:35,716 INFO L225 Difference]: With dead ends: 71897 [2021-04-15 02:22:35,717 INFO L226 Difference]: Without dead ends: 71897 [2021-04-15 02:22:35,717 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:22:35,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71897 states. [2021-04-15 02:22:36,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71897 to 70150. [2021-04-15 02:22:36,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70150 states, 70149 states have (on average 3.098347802534605) internal successors, (217346), 70149 states have internal predecessors, (217346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:37,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70150 states to 70150 states and 217346 transitions. [2021-04-15 02:22:37,188 INFO L78 Accepts]: Start accepts. Automaton has 70150 states and 217346 transitions. Word has length 22 [2021-04-15 02:22:37,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:37,188 INFO L480 AbstractCegarLoop]: Abstraction has 70150 states and 217346 transitions. [2021-04-15 02:22:37,188 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 02:22:37,188 INFO L276 IsEmpty]: Start isEmpty. Operand 70150 states and 217346 transitions. [2021-04-15 02:22:37,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:37,207 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:37,207 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:37,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10493,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:37,407 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:37,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:37,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1009433127, now seen corresponding path program 197 times [2021-04-15 02:22:37,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:37,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962689182] [2021-04-15 02:22:37,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:37,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962689182] [2021-04-15 02:22:37,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661904803] [2021-04-15 02:22:37,479 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 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 02:22:37,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:22:37,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:37,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:37,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:37,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:37,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:22:37,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535225577] [2021-04-15 02:22:37,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:37,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:37,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:37,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:37,551 INFO L87 Difference]: Start difference. First operand 70150 states and 217346 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 02:22:38,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:38,235 INFO L93 Difference]: Finished difference Result 81568 states and 251022 transitions. [2021-04-15 02:22:38,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:22:38,236 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 22 [2021-04-15 02:22:38,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:38,403 INFO L225 Difference]: With dead ends: 81568 [2021-04-15 02:22:38,404 INFO L226 Difference]: Without dead ends: 81568 [2021-04-15 02:22:38,404 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:22:38,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81568 states. [2021-04-15 02:22:39,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81568 to 71366. [2021-04-15 02:22:39,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71366 states, 71365 states have (on average 3.0934491697610875) internal successors, (220764), 71365 states have internal predecessors, (220764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:39,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71366 states to 71366 states and 220764 transitions. [2021-04-15 02:22:39,892 INFO L78 Accepts]: Start accepts. Automaton has 71366 states and 220764 transitions. Word has length 22 [2021-04-15 02:22:39,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:39,892 INFO L480 AbstractCegarLoop]: Abstraction has 71366 states and 220764 transitions. [2021-04-15 02:22:39,892 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 02:22:39,892 INFO L276 IsEmpty]: Start isEmpty. Operand 71366 states and 220764 transitions. [2021-04-15 02:22:39,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:39,909 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:39,909 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:40,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10494,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:40,109 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:40,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:40,110 INFO L82 PathProgramCache]: Analyzing trace with hash 503086861, now seen corresponding path program 198 times [2021-04-15 02:22:40,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:40,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193347465] [2021-04-15 02:22:40,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:40,177 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:40,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193347465] [2021-04-15 02:22:40,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850634761] [2021-04-15 02:22:40,178 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 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 02:22:40,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:22:40,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:40,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:40,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:40,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:40,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:22:40,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852398106] [2021-04-15 02:22:40,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:40,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:40,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:40,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:40,243 INFO L87 Difference]: Start difference. First operand 71366 states and 220764 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 02:22:41,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:41,052 INFO L93 Difference]: Finished difference Result 104720 states and 323372 transitions. [2021-04-15 02:22:41,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:22:41,052 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 22 [2021-04-15 02:22:41,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:41,338 INFO L225 Difference]: With dead ends: 104720 [2021-04-15 02:22:41,338 INFO L226 Difference]: Without dead ends: 104720 [2021-04-15 02:22:41,338 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:22:41,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104720 states. [2021-04-15 02:22:43,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104720 to 99727. [2021-04-15 02:22:43,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99727 states, 99726 states have (on average 3.0966046968694223) internal successors, (308812), 99726 states have internal predecessors, (308812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99727 states to 99727 states and 308812 transitions. [2021-04-15 02:22:44,042 INFO L78 Accepts]: Start accepts. Automaton has 99727 states and 308812 transitions. Word has length 22 [2021-04-15 02:22:44,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:44,042 INFO L480 AbstractCegarLoop]: Abstraction has 99727 states and 308812 transitions. [2021-04-15 02:22:44,042 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 02:22:44,042 INFO L276 IsEmpty]: Start isEmpty. Operand 99727 states and 308812 transitions. [2021-04-15 02:22:44,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:44,059 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:44,059 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:44,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10495 [2021-04-15 02:22:44,259 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:44,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:44,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1986221799, now seen corresponding path program 199 times [2021-04-15 02:22:44,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:44,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756605860] [2021-04-15 02:22:44,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:44,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756605860] [2021-04-15 02:22:44,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954975678] [2021-04-15 02:22:44,331 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 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 02:22:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:44,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:44,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:44,394 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:44,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:44,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:22:44,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000052139] [2021-04-15 02:22:44,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:44,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:44,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:44,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:44,395 INFO L87 Difference]: Start difference. First operand 99727 states and 308812 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 02:22:45,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:45,063 INFO L93 Difference]: Finished difference Result 122524 states and 378377 transitions. [2021-04-15 02:22:45,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:22:45,063 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 22 [2021-04-15 02:22:45,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:45,350 INFO L225 Difference]: With dead ends: 122524 [2021-04-15 02:22:45,350 INFO L226 Difference]: Without dead ends: 122524 [2021-04-15 02:22:45,350 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 213.1ms TimeCoverageRelationStatistics Valid=382, Invalid=740, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:22:45,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122524 states. [2021-04-15 02:22:47,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122524 to 119170. [2021-04-15 02:22:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119170 states, 119169 states have (on average 3.0954358935629234) internal successors, (368880), 119169 states have internal predecessors, (368880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:48,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119170 states to 119170 states and 368880 transitions. [2021-04-15 02:22:48,196 INFO L78 Accepts]: Start accepts. Automaton has 119170 states and 368880 transitions. Word has length 22 [2021-04-15 02:22:48,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:48,196 INFO L480 AbstractCegarLoop]: Abstraction has 119170 states and 368880 transitions. [2021-04-15 02:22:48,196 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 02:22:48,196 INFO L276 IsEmpty]: Start isEmpty. Operand 119170 states and 368880 transitions. [2021-04-15 02:22:48,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:48,216 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:48,216 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:48,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10496 [2021-04-15 02:22:48,416 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:48,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:48,417 INFO L82 PathProgramCache]: Analyzing trace with hash -2047516429, now seen corresponding path program 200 times [2021-04-15 02:22:48,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:48,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698796490] [2021-04-15 02:22:48,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:48,506 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:48,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698796490] [2021-04-15 02:22:48,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653015851] [2021-04-15 02:22:48,506 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 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 02:22:48,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:48,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:48,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:48,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:48,569 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:48,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:48,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:22:48,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545278082] [2021-04-15 02:22:48,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:48,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:48,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:48,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:48,569 INFO L87 Difference]: Start difference. First operand 119170 states and 368880 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:49,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:49,691 INFO L93 Difference]: Finished difference Result 149360 states and 458856 transitions. [2021-04-15 02:22:49,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:22:49,692 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:22:49,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:49,991 INFO L225 Difference]: With dead ends: 149360 [2021-04-15 02:22:49,991 INFO L226 Difference]: Without dead ends: 149360 [2021-04-15 02:22:49,991 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 165.9ms TimeCoverageRelationStatistics Valid=265, Invalid=491, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:22:50,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149360 states. [2021-04-15 02:22:52,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149360 to 66855. [2021-04-15 02:22:52,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66855 states, 66854 states have (on average 3.0857241152361863) internal successors, (206293), 66854 states have internal predecessors, (206293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:52,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66855 states to 66855 states and 206293 transitions. [2021-04-15 02:22:52,491 INFO L78 Accepts]: Start accepts. Automaton has 66855 states and 206293 transitions. Word has length 22 [2021-04-15 02:22:52,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:52,491 INFO L480 AbstractCegarLoop]: Abstraction has 66855 states and 206293 transitions. [2021-04-15 02:22:52,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:52,491 INFO L276 IsEmpty]: Start isEmpty. Operand 66855 states and 206293 transitions. [2021-04-15 02:22:52,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:52,510 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:52,510 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:52,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10497 [2021-04-15 02:22:52,710 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:52,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:52,711 INFO L82 PathProgramCache]: Analyzing trace with hash -564381491, now seen corresponding path program 201 times [2021-04-15 02:22:52,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:52,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881773573] [2021-04-15 02:22:52,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:52,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:52,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881773573] [2021-04-15 02:22:52,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7257892] [2021-04-15 02:22:52,785 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 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 02:22:52,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:22:52,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:52,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:52,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:52,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:52,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:22:52,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247165970] [2021-04-15 02:22:52,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:52,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:52,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:52,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:52,849 INFO L87 Difference]: Start difference. First operand 66855 states and 206293 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:53,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:53,362 INFO L93 Difference]: Finished difference Result 89497 states and 274720 transitions. [2021-04-15 02:22:53,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:22:53,363 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:22:53,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:53,552 INFO L225 Difference]: With dead ends: 89497 [2021-04-15 02:22:53,552 INFO L226 Difference]: Without dead ends: 89497 [2021-04-15 02:22:53,552 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 215.5ms TimeCoverageRelationStatistics Valid=409, Invalid=781, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:22:53,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89497 states. [2021-04-15 02:22:55,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89497 to 43123. [2021-04-15 02:22:55,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43123 states, 43122 states have (on average 3.0917397152265664) internal successors, (133322), 43122 states have internal predecessors, (133322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:55,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43123 states to 43123 states and 133322 transitions. [2021-04-15 02:22:55,179 INFO L78 Accepts]: Start accepts. Automaton has 43123 states and 133322 transitions. Word has length 22 [2021-04-15 02:22:55,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:55,179 INFO L480 AbstractCegarLoop]: Abstraction has 43123 states and 133322 transitions. [2021-04-15 02:22:55,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:55,179 INFO L276 IsEmpty]: Start isEmpty. Operand 43123 states and 133322 transitions. [2021-04-15 02:22:55,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:55,191 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:55,191 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:55,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10498 [2021-04-15 02:22:55,391 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:55,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:55,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1579474701, now seen corresponding path program 202 times [2021-04-15 02:22:55,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:55,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264702983] [2021-04-15 02:22:55,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:55,453 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:55,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264702983] [2021-04-15 02:22:55,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696450163] [2021-04-15 02:22:55,454 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 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 02:22:55,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:55,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:55,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:55,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:55,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:55,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:22:55,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61642847] [2021-04-15 02:22:55,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:55,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:55,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:55,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:55,516 INFO L87 Difference]: Start difference. First operand 43123 states and 133322 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 02:22:55,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:55,732 INFO L93 Difference]: Finished difference Result 46015 states and 141473 transitions. [2021-04-15 02:22:55,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:22:55,732 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 22 [2021-04-15 02:22:55,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:55,808 INFO L225 Difference]: With dead ends: 46015 [2021-04-15 02:22:55,808 INFO L226 Difference]: Without dead ends: 46015 [2021-04-15 02:22:55,808 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:22:55,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46015 states. [2021-04-15 02:22:56,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46015 to 33259. [2021-04-15 02:22:56,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33259 states, 33258 states have (on average 3.08671597811053) internal successors, (102658), 33258 states have internal predecessors, (102658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:56,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33259 states to 33259 states and 102658 transitions. [2021-04-15 02:22:56,654 INFO L78 Accepts]: Start accepts. Automaton has 33259 states and 102658 transitions. Word has length 22 [2021-04-15 02:22:56,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:56,654 INFO L480 AbstractCegarLoop]: Abstraction has 33259 states and 102658 transitions. [2021-04-15 02:22:56,655 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 02:22:56,655 INFO L276 IsEmpty]: Start isEmpty. Operand 33259 states and 102658 transitions. [2021-04-15 02:22:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:56,664 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:56,664 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:56,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10499 [2021-04-15 02:22:56,864 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:56,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:56,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2117330279, now seen corresponding path program 203 times [2021-04-15 02:22:56,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:56,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433533437] [2021-04-15 02:22:56,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:56,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433533437] [2021-04-15 02:22:56,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183665085] [2021-04-15 02:22:56,935 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 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 02:22:56,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:22:56,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:56,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:56,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:57,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:57,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:22:57,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588091384] [2021-04-15 02:22:57,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:57,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:57,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:57,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:57,005 INFO L87 Difference]: Start difference. First operand 33259 states and 102658 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 02:22:57,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:57,204 INFO L93 Difference]: Finished difference Result 35745 states and 109875 transitions. [2021-04-15 02:22:57,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:22:57,205 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 22 [2021-04-15 02:22:57,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:57,268 INFO L225 Difference]: With dead ends: 35745 [2021-04-15 02:22:57,268 INFO L226 Difference]: Without dead ends: 35745 [2021-04-15 02:22:57,268 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:22:57,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35745 states. [2021-04-15 02:22:58,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35745 to 35523. [2021-04-15 02:22:58,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35523 states, 35522 states have (on average 3.083694611789877) internal successors, (109539), 35522 states have internal predecessors, (109539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:58,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35523 states to 35523 states and 109539 transitions. [2021-04-15 02:22:58,112 INFO L78 Accepts]: Start accepts. Automaton has 35523 states and 109539 transitions. Word has length 22 [2021-04-15 02:22:58,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:58,112 INFO L480 AbstractCegarLoop]: Abstraction has 35523 states and 109539 transitions. [2021-04-15 02:22:58,112 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 02:22:58,112 INFO L276 IsEmpty]: Start isEmpty. Operand 35523 states and 109539 transitions. [2021-04-15 02:22:58,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:58,123 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:58,123 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:58,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10500,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:58,323 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:58,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:58,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1610984013, now seen corresponding path program 204 times [2021-04-15 02:22:58,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:58,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741724554] [2021-04-15 02:22:58,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:58,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741724554] [2021-04-15 02:22:58,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827506514] [2021-04-15 02:22:58,398 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 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 02:22:58,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:22:58,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:58,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:58,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:58,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:58,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:22:58,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92085549] [2021-04-15 02:22:58,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:58,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:58,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:58,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:58,463 INFO L87 Difference]: Start difference. First operand 35523 states and 109539 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:58,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:58,695 INFO L93 Difference]: Finished difference Result 36167 states and 111049 transitions. [2021-04-15 02:22:58,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:22:58,695 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:22:58,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:58,755 INFO L225 Difference]: With dead ends: 36167 [2021-04-15 02:22:58,756 INFO L226 Difference]: Without dead ends: 36167 [2021-04-15 02:22:58,756 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:22:58,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36167 states. [2021-04-15 02:22:59,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36167 to 33964. [2021-04-15 02:22:59,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33964 states, 33963 states have (on average 3.083973736124606) internal successors, (104741), 33963 states have internal predecessors, (104741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:59,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33964 states to 33964 states and 104741 transitions. [2021-04-15 02:22:59,569 INFO L78 Accepts]: Start accepts. Automaton has 33964 states and 104741 transitions. Word has length 22 [2021-04-15 02:22:59,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:59,569 INFO L480 AbstractCegarLoop]: Abstraction has 33964 states and 104741 transitions. [2021-04-15 02:22:59,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:22:59,570 INFO L276 IsEmpty]: Start isEmpty. Operand 33964 states and 104741 transitions. [2021-04-15 02:22:59,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:22:59,579 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:59,579 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:59,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10501 [2021-04-15 02:22:59,779 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:59,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:59,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1200848345, now seen corresponding path program 205 times [2021-04-15 02:22:59,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:59,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807378612] [2021-04-15 02:22:59,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:59,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807378612] [2021-04-15 02:22:59,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028725356] [2021-04-15 02:22:59,855 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 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 02:22:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:59,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:59,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:59,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:59,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:22:59,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432051367] [2021-04-15 02:22:59,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:59,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:59,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:59,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:59,918 INFO L87 Difference]: Start difference. First operand 33964 states and 104741 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:23:00,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:00,209 INFO L93 Difference]: Finished difference Result 36419 states and 111773 transitions. [2021-04-15 02:23:00,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:23:00,210 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:23:00,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:00,274 INFO L225 Difference]: With dead ends: 36419 [2021-04-15 02:23:00,274 INFO L226 Difference]: Without dead ends: 36419 [2021-04-15 02:23:00,275 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 175.6ms TimeCoverageRelationStatistics Valid=284, Invalid=586, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:23:00,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36419 states. [2021-04-15 02:23:00,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36419 to 34818. [2021-04-15 02:23:01,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34818 states, 34817 states have (on average 3.083206479593302) internal successors, (107348), 34817 states have internal predecessors, (107348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:01,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34818 states to 34818 states and 107348 transitions. [2021-04-15 02:23:01,102 INFO L78 Accepts]: Start accepts. Automaton has 34818 states and 107348 transitions. Word has length 22 [2021-04-15 02:23:01,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:01,103 INFO L480 AbstractCegarLoop]: Abstraction has 34818 states and 107348 transitions. [2021-04-15 02:23:01,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:23:01,103 INFO L276 IsEmpty]: Start isEmpty. Operand 34818 states and 107348 transitions. [2021-04-15 02:23:01,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:01,112 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:01,112 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:01,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10502 [2021-04-15 02:23:01,313 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:01,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:01,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1826661773, now seen corresponding path program 206 times [2021-04-15 02:23:01,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:01,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104259405] [2021-04-15 02:23:01,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:01,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104259405] [2021-04-15 02:23:01,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396853955] [2021-04-15 02:23:01,393 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 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 02:23:01,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:23:01,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:01,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:01,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:01,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:01,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:23:01,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777647022] [2021-04-15 02:23:01,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:23:01,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:01,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:23:01,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:23:01,456 INFO L87 Difference]: Start difference. First operand 34818 states and 107348 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:23:01,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:01,841 INFO L93 Difference]: Finished difference Result 36428 states and 111724 transitions. [2021-04-15 02:23:01,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:23:01,842 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:23:01,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:01,898 INFO L225 Difference]: With dead ends: 36428 [2021-04-15 02:23:01,898 INFO L226 Difference]: Without dead ends: 36428 [2021-04-15 02:23:01,898 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 271.2ms TimeCoverageRelationStatistics Valid=524, Invalid=1036, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 02:23:01,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36428 states. [2021-04-15 02:23:02,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36428 to 34194. [2021-04-15 02:23:02,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34194 states, 34193 states have (on average 3.0853683502471267) internal successors, (105498), 34193 states have internal predecessors, (105498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:02,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34194 states to 34194 states and 105498 transitions. [2021-04-15 02:23:02,728 INFO L78 Accepts]: Start accepts. Automaton has 34194 states and 105498 transitions. Word has length 22 [2021-04-15 02:23:02,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:02,728 INFO L480 AbstractCegarLoop]: Abstraction has 34194 states and 105498 transitions. [2021-04-15 02:23:02,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:23:02,729 INFO L276 IsEmpty]: Start isEmpty. Operand 34194 states and 105498 transitions. [2021-04-15 02:23:02,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:02,738 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:02,738 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:02,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10503,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:02,939 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:02,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:02,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1663098905, now seen corresponding path program 207 times [2021-04-15 02:23:02,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:02,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760144600] [2021-04-15 02:23:02,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:02,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760144600] [2021-04-15 02:23:02,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517680119] [2021-04-15 02:23:02,994 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 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 02:23:03,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:23:03,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:03,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:03,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:23:03,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:03,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:23:03,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513114967] [2021-04-15 02:23:03,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:23:03,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:03,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:23:03,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:23:03,060 INFO L87 Difference]: Start difference. First operand 34194 states and 105498 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 02:23:03,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:03,352 INFO L93 Difference]: Finished difference Result 34348 states and 105669 transitions. [2021-04-15 02:23:03,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:23:03,353 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 22 [2021-04-15 02:23:03,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:03,407 INFO L225 Difference]: With dead ends: 34348 [2021-04-15 02:23:03,408 INFO L226 Difference]: Without dead ends: 34344 [2021-04-15 02:23:03,408 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:23:03,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34344 states. [2021-04-15 02:23:03,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34344 to 34194. [2021-04-15 02:23:03,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34194 states, 34193 states have (on average 3.0853098587430177) internal successors, (105496), 34193 states have internal predecessors, (105496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:04,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34194 states to 34194 states and 105496 transitions. [2021-04-15 02:23:04,351 INFO L78 Accepts]: Start accepts. Automaton has 34194 states and 105496 transitions. Word has length 22 [2021-04-15 02:23:04,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:04,351 INFO L480 AbstractCegarLoop]: Abstraction has 34194 states and 105496 transitions. [2021-04-15 02:23:04,351 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 02:23:04,351 INFO L276 IsEmpty]: Start isEmpty. Operand 34194 states and 105496 transitions. [2021-04-15 02:23:04,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:04,361 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:04,361 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:04,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10504 [2021-04-15 02:23:04,561 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:04,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:04,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1971295143, now seen corresponding path program 208 times [2021-04-15 02:23:04,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:04,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217754617] [2021-04-15 02:23:04,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:04,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:04,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217754617] [2021-04-15 02:23:04,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467445223] [2021-04-15 02:23:04,639 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 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 02:23:04,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:23:04,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:04,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:04,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:04,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:04,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:23:04,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780722389] [2021-04-15 02:23:04,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:23:04,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:04,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:23:04,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:23:04,710 INFO L87 Difference]: Start difference. First operand 34194 states and 105496 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:05,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:05,056 INFO L93 Difference]: Finished difference Result 37342 states and 114450 transitions. [2021-04-15 02:23:05,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:23:05,057 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-04-15 02:23:05,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:05,124 INFO L225 Difference]: With dead ends: 37342 [2021-04-15 02:23:05,125 INFO L226 Difference]: Without dead ends: 37342 [2021-04-15 02:23:05,125 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 218.6ms TimeCoverageRelationStatistics Valid=415, Invalid=775, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:23:05,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37342 states. [2021-04-15 02:23:05,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37342 to 32084. [2021-04-15 02:23:05,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32084 states, 32083 states have (on average 3.0869307733067357) internal successors, (99038), 32083 states have internal predecessors, (99038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:05,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32084 states to 32084 states and 99038 transitions. [2021-04-15 02:23:05,998 INFO L78 Accepts]: Start accepts. Automaton has 32084 states and 99038 transitions. Word has length 22 [2021-04-15 02:23:05,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:05,999 INFO L480 AbstractCegarLoop]: Abstraction has 32084 states and 99038 transitions. [2021-04-15 02:23:05,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:05,999 INFO L276 IsEmpty]: Start isEmpty. Operand 32084 states and 99038 transitions. [2021-04-15 02:23:06,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:06,008 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:06,008 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:06,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10505 [2021-04-15 02:23:06,213 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:06,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:06,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1334828289, now seen corresponding path program 209 times [2021-04-15 02:23:06,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:06,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150287233] [2021-04-15 02:23:06,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:06,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150287233] [2021-04-15 02:23:06,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864344] [2021-04-15 02:23:06,289 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 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 02:23:06,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:23:06,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:06,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:06,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:06,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:06,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:23:06,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139296311] [2021-04-15 02:23:06,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:23:06,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:06,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:23:06,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:23:06,361 INFO L87 Difference]: Start difference. First operand 32084 states and 99038 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:06,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:06,647 INFO L93 Difference]: Finished difference Result 32697 states and 100396 transitions. [2021-04-15 02:23:06,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:23:06,647 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-04-15 02:23:06,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:06,694 INFO L225 Difference]: With dead ends: 32697 [2021-04-15 02:23:06,694 INFO L226 Difference]: Without dead ends: 32697 [2021-04-15 02:23:06,695 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 191.5ms TimeCoverageRelationStatistics Valid=343, Invalid=649, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:23:06,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32697 states. [2021-04-15 02:23:07,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32697 to 31320. [2021-04-15 02:23:07,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31320 states, 31319 states have (on average 3.0872313930840702) internal successors, (96689), 31319 states have internal predecessors, (96689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:07,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31320 states to 31320 states and 96689 transitions. [2021-04-15 02:23:07,196 INFO L78 Accepts]: Start accepts. Automaton has 31320 states and 96689 transitions. Word has length 22 [2021-04-15 02:23:07,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:07,196 INFO L480 AbstractCegarLoop]: Abstraction has 31320 states and 96689 transitions. [2021-04-15 02:23:07,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:07,197 INFO L276 IsEmpty]: Start isEmpty. Operand 31320 states and 96689 transitions. [2021-04-15 02:23:07,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:07,204 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:07,204 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:07,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10506,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:07,406 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:07,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:07,406 INFO L82 PathProgramCache]: Analyzing trace with hash 67371111, now seen corresponding path program 210 times [2021-04-15 02:23:07,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:07,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403503777] [2021-04-15 02:23:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:07,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403503777] [2021-04-15 02:23:07,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723708529] [2021-04-15 02:23:07,489 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:07,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:23:07,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:07,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:07,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:07,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:07,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:23:07,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665816796] [2021-04-15 02:23:07,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:23:07,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:07,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:23:07,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:23:07,562 INFO L87 Difference]: Start difference. First operand 31320 states and 96689 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:08,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:08,165 INFO L93 Difference]: Finished difference Result 33049 states and 101433 transitions. [2021-04-15 02:23:08,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:23:08,166 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-04-15 02:23:08,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:08,211 INFO L225 Difference]: With dead ends: 33049 [2021-04-15 02:23:08,211 INFO L226 Difference]: Without dead ends: 33049 [2021-04-15 02:23:08,212 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 288.5ms TimeCoverageRelationStatistics Valid=561, Invalid=1079, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 02:23:08,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33049 states. [2021-04-15 02:23:08,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33049 to 30873. [2021-04-15 02:23:08,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30873 states, 30872 states have (on average 3.089045089401399) internal successors, (95365), 30872 states have internal predecessors, (95365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:08,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30873 states to 30873 states and 95365 transitions. [2021-04-15 02:23:08,700 INFO L78 Accepts]: Start accepts. Automaton has 30873 states and 95365 transitions. Word has length 22 [2021-04-15 02:23:08,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:08,701 INFO L480 AbstractCegarLoop]: Abstraction has 30873 states and 95365 transitions. [2021-04-15 02:23:08,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:08,701 INFO L276 IsEmpty]: Start isEmpty. Operand 30873 states and 95365 transitions. [2021-04-15 02:23:08,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:08,708 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:08,709 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:08,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10507,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:08,909 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:08,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:08,909 INFO L82 PathProgramCache]: Analyzing trace with hash -658261175, now seen corresponding path program 211 times [2021-04-15 02:23:08,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:08,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523727971] [2021-04-15 02:23:08,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:08,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523727971] [2021-04-15 02:23:08,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879609749] [2021-04-15 02:23:08,966 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 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 02:23:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:08,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:08,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:09,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:09,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:23:09,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703384746] [2021-04-15 02:23:09,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:09,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:09,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:09,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:09,026 INFO L87 Difference]: Start difference. First operand 30873 states and 95365 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 02:23:09,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:09,376 INFO L93 Difference]: Finished difference Result 31092 states and 95691 transitions. [2021-04-15 02:23:09,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:23:09,377 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 22 [2021-04-15 02:23:09,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:09,427 INFO L225 Difference]: With dead ends: 31092 [2021-04-15 02:23:09,428 INFO L226 Difference]: Without dead ends: 31088 [2021-04-15 02:23:09,428 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:23:09,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31088 states. [2021-04-15 02:23:09,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31088 to 30908. [2021-04-15 02:23:09,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30908 states, 30907 states have (on average 3.088588345682208) internal successors, (95459), 30907 states have internal predecessors, (95459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:09,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30908 states to 30908 states and 95459 transitions. [2021-04-15 02:23:09,945 INFO L78 Accepts]: Start accepts. Automaton has 30908 states and 95459 transitions. Word has length 22 [2021-04-15 02:23:09,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:09,946 INFO L480 AbstractCegarLoop]: Abstraction has 30908 states and 95459 transitions. [2021-04-15 02:23:09,946 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 02:23:09,946 INFO L276 IsEmpty]: Start isEmpty. Operand 30908 states and 95459 transitions. [2021-04-15 02:23:09,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:09,953 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:09,953 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:10,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10508,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:10,154 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:10,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:10,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1059487885, now seen corresponding path program 212 times [2021-04-15 02:23:10,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:10,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484357594] [2021-04-15 02:23:10,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:10,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484357594] [2021-04-15 02:23:10,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605689337] [2021-04-15 02:23:10,211 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 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 02:23:10,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:23:10,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:10,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:10,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:10,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:10,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:23:10,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076537771] [2021-04-15 02:23:10,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:10,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:10,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:10,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:10,274 INFO L87 Difference]: Start difference. First operand 30908 states and 95459 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 02:23:10,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:10,440 INFO L93 Difference]: Finished difference Result 31582 states and 97082 transitions. [2021-04-15 02:23:10,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:23:10,441 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 22 [2021-04-15 02:23:10,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:10,484 INFO L225 Difference]: With dead ends: 31582 [2021-04-15 02:23:10,484 INFO L226 Difference]: Without dead ends: 31582 [2021-04-15 02:23:10,484 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:23:10,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31582 states. [2021-04-15 02:23:10,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31582 to 30923. [2021-04-15 02:23:11,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30923 states, 30922 states have (on average 3.0885130327921866) internal successors, (95503), 30922 states have internal predecessors, (95503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:11,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30923 states to 30923 states and 95503 transitions. [2021-04-15 02:23:11,075 INFO L78 Accepts]: Start accepts. Automaton has 30923 states and 95503 transitions. Word has length 22 [2021-04-15 02:23:11,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:11,075 INFO L480 AbstractCegarLoop]: Abstraction has 30923 states and 95503 transitions. [2021-04-15 02:23:11,075 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 02:23:11,075 INFO L276 IsEmpty]: Start isEmpty. Operand 30923 states and 95503 transitions. [2021-04-15 02:23:11,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:11,085 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:11,085 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:11,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10509,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:11,285 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:11,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:11,285 INFO L82 PathProgramCache]: Analyzing trace with hash -669559449, now seen corresponding path program 213 times [2021-04-15 02:23:11,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:11,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636165586] [2021-04-15 02:23:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:11,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636165586] [2021-04-15 02:23:11,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926444035] [2021-04-15 02:23:11,344 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 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 02:23:11,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:23:11,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:11,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:11,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:11,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:11,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:11,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814533794] [2021-04-15 02:23:11,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:11,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:11,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:11,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:11,415 INFO L87 Difference]: Start difference. First operand 30923 states and 95503 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 02:23:11,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:11,619 INFO L93 Difference]: Finished difference Result 31896 states and 97991 transitions. [2021-04-15 02:23:11,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:23:11,619 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 22 [2021-04-15 02:23:11,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:11,665 INFO L225 Difference]: With dead ends: 31896 [2021-04-15 02:23:11,665 INFO L226 Difference]: Without dead ends: 31896 [2021-04-15 02:23:11,665 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=193, Invalid=313, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:23:11,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31896 states. [2021-04-15 02:23:12,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31896 to 30949. [2021-04-15 02:23:12,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30949 states, 30948 states have (on average 3.0883094222566885) internal successors, (95577), 30948 states have internal predecessors, (95577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:12,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30949 states to 30949 states and 95577 transitions. [2021-04-15 02:23:12,247 INFO L78 Accepts]: Start accepts. Automaton has 30949 states and 95577 transitions. Word has length 22 [2021-04-15 02:23:12,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:12,247 INFO L480 AbstractCegarLoop]: Abstraction has 30949 states and 95577 transitions. [2021-04-15 02:23:12,247 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 02:23:12,247 INFO L276 IsEmpty]: Start isEmpty. Operand 30949 states and 95577 transitions. [2021-04-15 02:23:12,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:12,255 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:12,255 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:12,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10510,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:12,456 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:12,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:12,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1564548045, now seen corresponding path program 214 times [2021-04-15 02:23:12,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:12,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238616996] [2021-04-15 02:23:12,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:12,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238616996] [2021-04-15 02:23:12,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472081783] [2021-04-15 02:23:12,521 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 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 02:23:12,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:23:12,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:12,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:12,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:12,590 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:12,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:12,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:23:12,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660120204] [2021-04-15 02:23:12,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:23:12,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:12,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:23:12,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:23:12,591 INFO L87 Difference]: Start difference. First operand 30949 states and 95577 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:23:12,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:12,804 INFO L93 Difference]: Finished difference Result 31958 states and 98178 transitions. [2021-04-15 02:23:12,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:23:12,804 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:23:12,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:12,851 INFO L225 Difference]: With dead ends: 31958 [2021-04-15 02:23:12,852 INFO L226 Difference]: Without dead ends: 31958 [2021-04-15 02:23:12,852 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=222, Invalid=378, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:23:12,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31958 states. [2021-04-15 02:23:13,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31958 to 30995. [2021-04-15 02:23:13,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30995 states, 30994 states have (on average 3.0880170355552687) internal successors, (95710), 30994 states have internal predecessors, (95710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:13,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30995 states to 30995 states and 95710 transitions. [2021-04-15 02:23:13,569 INFO L78 Accepts]: Start accepts. Automaton has 30995 states and 95710 transitions. Word has length 22 [2021-04-15 02:23:13,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:13,569 INFO L480 AbstractCegarLoop]: Abstraction has 30995 states and 95710 transitions. [2021-04-15 02:23:13,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:23:13,569 INFO L276 IsEmpty]: Start isEmpty. Operand 30995 states and 95710 transitions. [2021-04-15 02:23:13,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:13,576 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:13,576 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:13,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10511 [2021-04-15 02:23:13,776 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:13,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:13,776 INFO L82 PathProgramCache]: Analyzing trace with hash 2102403623, now seen corresponding path program 215 times [2021-04-15 02:23:13,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:13,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131133117] [2021-04-15 02:23:13,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:13,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131133117] [2021-04-15 02:23:13,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414017610] [2021-04-15 02:23:13,845 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 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 02:23:13,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:23:13,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:13,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:13,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:13,918 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:13,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:13,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:23:13,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774139269] [2021-04-15 02:23:13,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:23:13,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:13,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:23:13,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:23:13,919 INFO L87 Difference]: Start difference. First operand 30995 states and 95710 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:23:14,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:14,136 INFO L93 Difference]: Finished difference Result 36047 states and 110795 transitions. [2021-04-15 02:23:14,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:23:14,136 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:23:14,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:14,199 INFO L225 Difference]: With dead ends: 36047 [2021-04-15 02:23:14,199 INFO L226 Difference]: Without dead ends: 36047 [2021-04-15 02:23:14,199 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:23:14,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36047 states. [2021-04-15 02:23:14,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36047 to 35338. [2021-04-15 02:23:14,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35338 states, 35337 states have (on average 3.0890001980926507) internal successors, (109156), 35337 states have internal predecessors, (109156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:14,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35338 states to 35338 states and 109156 transitions. [2021-04-15 02:23:14,760 INFO L78 Accepts]: Start accepts. Automaton has 35338 states and 109156 transitions. Word has length 22 [2021-04-15 02:23:14,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:14,760 INFO L480 AbstractCegarLoop]: Abstraction has 35338 states and 109156 transitions. [2021-04-15 02:23:14,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:23:14,760 INFO L276 IsEmpty]: Start isEmpty. Operand 35338 states and 109156 transitions. [2021-04-15 02:23:14,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:14,769 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:14,769 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:14,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10512 [2021-04-15 02:23:14,969 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:14,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:14,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1596057357, now seen corresponding path program 216 times [2021-04-15 02:23:14,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:14,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641066278] [2021-04-15 02:23:14,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:15,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641066278] [2021-04-15 02:23:15,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391360893] [2021-04-15 02:23:15,274 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 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 02:23:15,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:23:15,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:15,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:15,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:15,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:15,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:23:15,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90150102] [2021-04-15 02:23:15,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:23:15,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:15,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:23:15,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:23:15,345 INFO L87 Difference]: Start difference. First operand 35338 states and 109156 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:23:15,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:15,547 INFO L93 Difference]: Finished difference Result 39264 states and 120741 transitions. [2021-04-15 02:23:15,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:23:15,547 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:23:15,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:15,607 INFO L225 Difference]: With dead ends: 39264 [2021-04-15 02:23:15,607 INFO L226 Difference]: Without dead ends: 39264 [2021-04-15 02:23:15,607 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 338.9ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:23:15,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39264 states. [2021-04-15 02:23:16,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39264 to 38914. [2021-04-15 02:23:16,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38914 states, 38913 states have (on average 3.083982216739907) internal successors, (120007), 38913 states have internal predecessors, (120007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:16,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38914 states to 38914 states and 120007 transitions. [2021-04-15 02:23:16,218 INFO L78 Accepts]: Start accepts. Automaton has 38914 states and 120007 transitions. Word has length 22 [2021-04-15 02:23:16,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:16,218 INFO L480 AbstractCegarLoop]: Abstraction has 38914 states and 120007 transitions. [2021-04-15 02:23:16,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:23:16,218 INFO L276 IsEmpty]: Start isEmpty. Operand 38914 states and 120007 transitions. [2021-04-15 02:23:16,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:16,229 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:16,229 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:16,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10513,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:16,429 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:16,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:16,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1215775001, now seen corresponding path program 217 times [2021-04-15 02:23:16,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:16,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024881356] [2021-04-15 02:23:16,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:16,713 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:16,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024881356] [2021-04-15 02:23:16,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901415613] [2021-04-15 02:23:16,713 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 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 02:23:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:16,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:16,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:16,789 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:16,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:16,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:23:16,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233671017] [2021-04-15 02:23:16,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:23:16,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:16,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:23:16,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:23:16,790 INFO L87 Difference]: Start difference. First operand 38914 states and 120007 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:17,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:17,087 INFO L93 Difference]: Finished difference Result 39365 states and 121002 transitions. [2021-04-15 02:23:17,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:23:17,087 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-04-15 02:23:17,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:17,153 INFO L225 Difference]: With dead ends: 39365 [2021-04-15 02:23:17,153 INFO L226 Difference]: Without dead ends: 39365 [2021-04-15 02:23:17,153 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 170.1ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:23:17,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39365 states. [2021-04-15 02:23:17,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39365 to 38918. [2021-04-15 02:23:17,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38918 states, 38917 states have (on average 3.0839735848086955) internal successors, (120019), 38917 states have internal predecessors, (120019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:17,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38918 states to 38918 states and 120019 transitions. [2021-04-15 02:23:17,737 INFO L78 Accepts]: Start accepts. Automaton has 38918 states and 120019 transitions. Word has length 22 [2021-04-15 02:23:17,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:17,737 INFO L480 AbstractCegarLoop]: Abstraction has 38918 states and 120019 transitions. [2021-04-15 02:23:17,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:17,737 INFO L276 IsEmpty]: Start isEmpty. Operand 38918 states and 120019 transitions. [2021-04-15 02:23:17,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:17,747 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:17,747 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:17,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10514 [2021-04-15 02:23:17,947 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:17,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:17,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1811735117, now seen corresponding path program 218 times [2021-04-15 02:23:17,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:17,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672379645] [2021-04-15 02:23:17,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:17,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:18,199 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-04-15 02:23:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:18,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672379645] [2021-04-15 02:23:18,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270226050] [2021-04-15 02:23:18,227 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 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 02:23:18,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:23:18,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:18,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:18,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:18,298 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:18,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:18,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:23:18,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592006720] [2021-04-15 02:23:18,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:23:18,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:18,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:23:18,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:23:18,299 INFO L87 Difference]: Start difference. First operand 38918 states and 120019 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:18,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:18,686 INFO L93 Difference]: Finished difference Result 40630 states and 124791 transitions. [2021-04-15 02:23:18,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:23:18,687 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-04-15 02:23:18,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:18,751 INFO L225 Difference]: With dead ends: 40630 [2021-04-15 02:23:18,751 INFO L226 Difference]: Without dead ends: 40630 [2021-04-15 02:23:18,752 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 444.3ms TimeCoverageRelationStatistics Valid=386, Invalid=804, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:23:18,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40630 states. [2021-04-15 02:23:19,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40630 to 40219. [2021-04-15 02:23:19,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40219 states, 40218 states have (on average 3.082301457059028) internal successors, (123964), 40218 states have internal predecessors, (123964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:19,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40219 states to 40219 states and 123964 transitions. [2021-04-15 02:23:19,649 INFO L78 Accepts]: Start accepts. Automaton has 40219 states and 123964 transitions. Word has length 22 [2021-04-15 02:23:19,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:19,649 INFO L480 AbstractCegarLoop]: Abstraction has 40219 states and 123964 transitions. [2021-04-15 02:23:19,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:19,649 INFO L276 IsEmpty]: Start isEmpty. Operand 40219 states and 123964 transitions. [2021-04-15 02:23:19,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:19,659 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:19,659 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:19,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10515,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:19,860 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:19,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:19,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1175268263, now seen corresponding path program 219 times [2021-04-15 02:23:19,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:19,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408481599] [2021-04-15 02:23:19,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:19,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408481599] [2021-04-15 02:23:19,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205689583] [2021-04-15 02:23:19,947 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 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 02:23:19,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:23:19,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:19,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:19,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:20,018 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:20,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:20,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:23:20,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935949700] [2021-04-15 02:23:20,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:23:20,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:20,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:23:20,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:23:20,019 INFO L87 Difference]: Start difference. First operand 40219 states and 123964 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:20,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:20,488 INFO L93 Difference]: Finished difference Result 42248 states and 129555 transitions. [2021-04-15 02:23:20,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 02:23:20,489 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-04-15 02:23:20,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:20,563 INFO L225 Difference]: With dead ends: 42248 [2021-04-15 02:23:20,564 INFO L226 Difference]: Without dead ends: 42248 [2021-04-15 02:23:20,564 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 327.2ms TimeCoverageRelationStatistics Valid=665, Invalid=1315, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 02:23:20,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42248 states. [2021-04-15 02:23:21,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42248 to 41433. [2021-04-15 02:23:21,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41433 states, 41432 states have (on average 3.080614018150222) internal successors, (127636), 41432 states have internal predecessors, (127636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:21,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41433 states to 41433 states and 127636 transitions. [2021-04-15 02:23:21,409 INFO L78 Accepts]: Start accepts. Automaton has 41433 states and 127636 transitions. Word has length 22 [2021-04-15 02:23:21,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:21,409 INFO L480 AbstractCegarLoop]: Abstraction has 41433 states and 127636 transitions. [2021-04-15 02:23:21,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:21,409 INFO L276 IsEmpty]: Start isEmpty. Operand 41433 states and 127636 transitions. [2021-04-15 02:23:21,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:21,420 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:21,420 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:21,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10516,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:21,621 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:21,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:21,622 INFO L82 PathProgramCache]: Analyzing trace with hash -141305647, now seen corresponding path program 220 times [2021-04-15 02:23:21,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:21,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369489145] [2021-04-15 02:23:21,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:21,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369489145] [2021-04-15 02:23:21,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506227800] [2021-04-15 02:23:21,688 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 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 02:23:21,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:23:21,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:21,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:21,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:21,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:21,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:23:21,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314687682] [2021-04-15 02:23:21,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:21,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:21,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:21,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:21,751 INFO L87 Difference]: Start difference. First operand 41433 states and 127636 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 02:23:22,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:22,127 INFO L93 Difference]: Finished difference Result 41740 states and 128184 transitions. [2021-04-15 02:23:22,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:23:22,128 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 22 [2021-04-15 02:23:22,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:22,214 INFO L225 Difference]: With dead ends: 41740 [2021-04-15 02:23:22,214 INFO L226 Difference]: Without dead ends: 41734 [2021-04-15 02:23:22,214 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:23:22,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41734 states. [2021-04-15 02:23:23,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41734 to 40967. [2021-04-15 02:23:23,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40967 states, 40966 states have (on average 3.0791632085143776) internal successors, (126141), 40966 states have internal predecessors, (126141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:23,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40967 states to 40967 states and 126141 transitions. [2021-04-15 02:23:23,158 INFO L78 Accepts]: Start accepts. Automaton has 40967 states and 126141 transitions. Word has length 22 [2021-04-15 02:23:23,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:23,158 INFO L480 AbstractCegarLoop]: Abstraction has 40967 states and 126141 transitions. [2021-04-15 02:23:23,158 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 02:23:23,158 INFO L276 IsEmpty]: Start isEmpty. Operand 40967 states and 126141 transitions. [2021-04-15 02:23:23,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:23,170 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:23,170 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:23,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10517 [2021-04-15 02:23:23,371 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:23,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:23,371 INFO L82 PathProgramCache]: Analyzing trace with hash 429354799, now seen corresponding path program 221 times [2021-04-15 02:23:23,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:23,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584074077] [2021-04-15 02:23:23,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:23,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584074077] [2021-04-15 02:23:23,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227533181] [2021-04-15 02:23:23,442 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 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 02:23:23,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:23:23,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:23,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:23,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:23,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:23,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:23:23,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937487862] [2021-04-15 02:23:23,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:23,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:23,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:23,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:23,514 INFO L87 Difference]: Start difference. First operand 40967 states and 126141 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 02:23:23,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:23,727 INFO L93 Difference]: Finished difference Result 46670 states and 143099 transitions. [2021-04-15 02:23:23,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:23:23,727 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 22 [2021-04-15 02:23:23,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:23,801 INFO L225 Difference]: With dead ends: 46670 [2021-04-15 02:23:23,801 INFO L226 Difference]: Without dead ends: 46670 [2021-04-15 02:23:23,801 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:23:23,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46670 states. [2021-04-15 02:23:24,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46670 to 45904. [2021-04-15 02:23:24,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45904 states, 45903 states have (on average 3.0725224930832407) internal successors, (141038), 45903 states have internal predecessors, (141038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:24,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45904 states to 45904 states and 141038 transitions. [2021-04-15 02:23:24,812 INFO L78 Accepts]: Start accepts. Automaton has 45904 states and 141038 transitions. Word has length 22 [2021-04-15 02:23:24,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:24,812 INFO L480 AbstractCegarLoop]: Abstraction has 45904 states and 141038 transitions. [2021-04-15 02:23:24,812 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 02:23:24,812 INFO L276 IsEmpty]: Start isEmpty. Operand 45904 states and 141038 transitions. [2021-04-15 02:23:24,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:24,825 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:24,825 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:25,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10518,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:25,025 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:25,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:25,026 INFO L82 PathProgramCache]: Analyzing trace with hash -76991467, now seen corresponding path program 222 times [2021-04-15 02:23:25,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:25,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711242733] [2021-04-15 02:23:25,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:25,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711242733] [2021-04-15 02:23:25,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044793110] [2021-04-15 02:23:25,097 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 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 02:23:25,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:23:25,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:25,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:25,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:25,161 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:25,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:25,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:23:25,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657028166] [2021-04-15 02:23:25,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:23:25,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:25,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:23:25,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:23:25,162 INFO L87 Difference]: Start difference. First operand 45904 states and 141038 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:23:25,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:25,437 INFO L93 Difference]: Finished difference Result 49343 states and 151040 transitions. [2021-04-15 02:23:25,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:23:25,437 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:23:25,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:25,532 INFO L225 Difference]: With dead ends: 49343 [2021-04-15 02:23:25,532 INFO L226 Difference]: Without dead ends: 49343 [2021-04-15 02:23:25,532 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 130.5ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:23:25,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49343 states. [2021-04-15 02:23:26,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49343 to 46131. [2021-04-15 02:23:26,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46131 states, 46130 states have (on average 3.0718621287665293) internal successors, (141705), 46130 states have internal predecessors, (141705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:26,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46131 states to 46131 states and 141705 transitions. [2021-04-15 02:23:26,573 INFO L78 Accepts]: Start accepts. Automaton has 46131 states and 141705 transitions. Word has length 22 [2021-04-15 02:23:26,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:26,573 INFO L480 AbstractCegarLoop]: Abstraction has 46131 states and 141705 transitions. [2021-04-15 02:23:26,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:23:26,573 INFO L276 IsEmpty]: Start isEmpty. Operand 46131 states and 141705 transitions. [2021-04-15 02:23:26,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:26,587 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:26,587 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:26,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10519,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:26,788 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:26,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:26,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1406143471, now seen corresponding path program 223 times [2021-04-15 02:23:26,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:26,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736379602] [2021-04-15 02:23:26,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:26,862 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:26,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736379602] [2021-04-15 02:23:26,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061244964] [2021-04-15 02:23:26,863 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 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 02:23:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:26,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:26,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:26,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:26,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:23:26,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19939216] [2021-04-15 02:23:26,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:23:26,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:26,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:23:26,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:23:26,925 INFO L87 Difference]: Start difference. First operand 46131 states and 141705 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:23:27,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:27,277 INFO L93 Difference]: Finished difference Result 55150 states and 168573 transitions. [2021-04-15 02:23:27,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:23:27,277 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:23:27,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:27,385 INFO L225 Difference]: With dead ends: 55150 [2021-04-15 02:23:27,385 INFO L226 Difference]: Without dead ends: 55150 [2021-04-15 02:23:27,385 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 175.4ms TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:23:27,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55150 states. [2021-04-15 02:23:28,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55150 to 52518. [2021-04-15 02:23:28,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52518 states, 52517 states have (on average 3.067406744482739) internal successors, (161091), 52517 states have internal predecessors, (161091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:28,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52518 states to 52518 states and 161091 transitions. [2021-04-15 02:23:28,472 INFO L78 Accepts]: Start accepts. Automaton has 52518 states and 161091 transitions. Word has length 22 [2021-04-15 02:23:28,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:28,472 INFO L480 AbstractCegarLoop]: Abstraction has 52518 states and 161091 transitions. [2021-04-15 02:23:28,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:23:28,473 INFO L276 IsEmpty]: Start isEmpty. Operand 52518 states and 161091 transitions. [2021-04-15 02:23:28,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:28,486 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:28,487 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:28,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10520 [2021-04-15 02:23:28,687 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:28,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:28,687 INFO L82 PathProgramCache]: Analyzing trace with hash 138686293, now seen corresponding path program 224 times [2021-04-15 02:23:28,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:28,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020707780] [2021-04-15 02:23:28,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:28,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020707780] [2021-04-15 02:23:28,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811788015] [2021-04-15 02:23:28,765 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 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 02:23:28,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:23:28,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:28,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:28,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:28,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:28,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:23:28,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989317216] [2021-04-15 02:23:28,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:23:28,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:28,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:23:28,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:23:28,829 INFO L87 Difference]: Start difference. First operand 52518 states and 161091 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:23:29,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:29,679 INFO L93 Difference]: Finished difference Result 68037 states and 207399 transitions. [2021-04-15 02:23:29,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:23:29,680 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:23:29,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:29,800 INFO L225 Difference]: With dead ends: 68037 [2021-04-15 02:23:29,800 INFO L226 Difference]: Without dead ends: 68037 [2021-04-15 02:23:29,801 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 272.3ms TimeCoverageRelationStatistics Valid=523, Invalid=1037, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 02:23:29,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68037 states. [2021-04-15 02:23:30,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68037 to 63418. [2021-04-15 02:23:30,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63418 states, 63417 states have (on average 3.060788116751029) internal successors, (194106), 63417 states have internal predecessors, (194106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:31,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63418 states to 63418 states and 194106 transitions. [2021-04-15 02:23:31,089 INFO L78 Accepts]: Start accepts. Automaton has 63418 states and 194106 transitions. Word has length 22 [2021-04-15 02:23:31,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:31,090 INFO L480 AbstractCegarLoop]: Abstraction has 63418 states and 194106 transitions. [2021-04-15 02:23:31,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:23:31,090 INFO L276 IsEmpty]: Start isEmpty. Operand 63418 states and 194106 transitions. [2021-04-15 02:23:31,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:31,109 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:31,109 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:31,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10521 [2021-04-15 02:23:31,323 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:31,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:31,324 INFO L82 PathProgramCache]: Analyzing trace with hash -353147191, now seen corresponding path program 225 times [2021-04-15 02:23:31,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:31,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392149119] [2021-04-15 02:23:31,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:31,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392149119] [2021-04-15 02:23:31,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373979980] [2021-04-15 02:23:31,400 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 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 02:23:31,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:23:31,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:31,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:31,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:31,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:31,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:23:31,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056233807] [2021-04-15 02:23:31,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:23:31,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:31,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:23:31,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:23:31,475 INFO L87 Difference]: Start difference. First operand 63418 states and 194106 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:31,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:31,915 INFO L93 Difference]: Finished difference Result 75602 states and 230264 transitions. [2021-04-15 02:23:31,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:23:31,916 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-04-15 02:23:31,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:32,044 INFO L225 Difference]: With dead ends: 75602 [2021-04-15 02:23:32,044 INFO L226 Difference]: Without dead ends: 75602 [2021-04-15 02:23:32,044 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 197.0ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:23:32,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75602 states. [2021-04-15 02:23:33,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75602 to 53421. [2021-04-15 02:23:33,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53421 states, 53420 states have (on average 3.0645638337701238) internal successors, (163709), 53420 states have internal predecessors, (163709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:33,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53421 states to 53421 states and 163709 transitions. [2021-04-15 02:23:33,489 INFO L78 Accepts]: Start accepts. Automaton has 53421 states and 163709 transitions. Word has length 22 [2021-04-15 02:23:33,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:33,489 INFO L480 AbstractCegarLoop]: Abstraction has 53421 states and 163709 transitions. [2021-04-15 02:23:33,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:33,489 INFO L276 IsEmpty]: Start isEmpty. Operand 53421 states and 163709 transitions. [2021-04-15 02:23:33,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:33,504 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:33,504 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:33,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10522,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:33,705 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:33,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:33,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1620604369, now seen corresponding path program 226 times [2021-04-15 02:23:33,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:33,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649324270] [2021-04-15 02:23:33,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:33,784 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:33,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649324270] [2021-04-15 02:23:33,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842199044] [2021-04-15 02:23:33,784 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 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 02:23:33,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:23:33,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:33,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:33,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:33,864 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:33,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:33,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:23:33,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391317956] [2021-04-15 02:23:33,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:23:33,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:33,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:23:33,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:23:33,865 INFO L87 Difference]: Start difference. First operand 53421 states and 163709 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:34,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:34,724 INFO L93 Difference]: Finished difference Result 68985 states and 210204 transitions. [2021-04-15 02:23:34,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:23:34,725 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-04-15 02:23:34,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:34,853 INFO L225 Difference]: With dead ends: 68985 [2021-04-15 02:23:34,854 INFO L226 Difference]: Without dead ends: 68985 [2021-04-15 02:23:34,854 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 627.1ms TimeCoverageRelationStatistics Valid=560, Invalid=1080, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 02:23:34,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68985 states. [2021-04-15 02:23:35,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68985 to 46695. [2021-04-15 02:23:35,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46695 states, 46694 states have (on average 3.0735426393112606) internal successors, (143516), 46694 states have internal predecessors, (143516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:36,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46695 states to 46695 states and 143516 transitions. [2021-04-15 02:23:36,031 INFO L78 Accepts]: Start accepts. Automaton has 46695 states and 143516 transitions. Word has length 22 [2021-04-15 02:23:36,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:36,031 INFO L480 AbstractCegarLoop]: Abstraction has 46695 states and 143516 transitions. [2021-04-15 02:23:36,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:36,032 INFO L276 IsEmpty]: Start isEmpty. Operand 46695 states and 143516 transitions. [2021-04-15 02:23:36,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:36,045 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:36,046 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:36,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10523,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:36,246 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:36,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:36,246 INFO L82 PathProgramCache]: Analyzing trace with hash 414428143, now seen corresponding path program 227 times [2021-04-15 02:23:36,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:36,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579706757] [2021-04-15 02:23:36,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:36,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579706757] [2021-04-15 02:23:36,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329612042] [2021-04-15 02:23:36,312 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 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 02:23:36,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:23:36,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:36,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:36,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:36,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:36,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:23:36,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243984954] [2021-04-15 02:23:36,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:23:36,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:36,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:23:36,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:23:36,384 INFO L87 Difference]: Start difference. First operand 46695 states and 143516 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:23:36,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:36,650 INFO L93 Difference]: Finished difference Result 49438 states and 151354 transitions. [2021-04-15 02:23:36,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:23:36,651 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:23:36,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:36,729 INFO L225 Difference]: With dead ends: 49438 [2021-04-15 02:23:36,729 INFO L226 Difference]: Without dead ends: 49438 [2021-04-15 02:23:36,730 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:23:36,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49438 states. [2021-04-15 02:23:37,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49438 to 36426. [2021-04-15 02:23:37,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36426 states, 36425 states have (on average 3.0824433768016473) internal successors, (112278), 36425 states have internal predecessors, (112278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:37,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36426 states to 36426 states and 112278 transitions. [2021-04-15 02:23:37,574 INFO L78 Accepts]: Start accepts. Automaton has 36426 states and 112278 transitions. Word has length 22 [2021-04-15 02:23:37,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:37,574 INFO L480 AbstractCegarLoop]: Abstraction has 36426 states and 112278 transitions. [2021-04-15 02:23:37,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:23:37,574 INFO L276 IsEmpty]: Start isEmpty. Operand 36426 states and 112278 transitions. [2021-04-15 02:23:37,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:37,583 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:37,583 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:37,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10524 [2021-04-15 02:23:37,784 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:37,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:37,784 INFO L82 PathProgramCache]: Analyzing trace with hash -91918123, now seen corresponding path program 228 times [2021-04-15 02:23:37,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:37,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492645357] [2021-04-15 02:23:37,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:37,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:37,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492645357] [2021-04-15 02:23:37,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952221305] [2021-04-15 02:23:37,853 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 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 02:23:37,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:23:37,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:37,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:37,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:37,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:37,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:23:37,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190850848] [2021-04-15 02:23:37,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:23:37,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:37,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:23:37,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:23:37,946 INFO L87 Difference]: Start difference. First operand 36426 states and 112278 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:23:38,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:38,139 INFO L93 Difference]: Finished difference Result 38526 states and 118284 transitions. [2021-04-15 02:23:38,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:23:38,140 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:23:38,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:38,202 INFO L225 Difference]: With dead ends: 38526 [2021-04-15 02:23:38,202 INFO L226 Difference]: Without dead ends: 38526 [2021-04-15 02:23:38,202 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:23:38,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38526 states. [2021-04-15 02:23:38,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38526 to 38139. [2021-04-15 02:23:38,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38139 states, 38138 states have (on average 3.0788976873459544) internal successors, (117423), 38138 states have internal predecessors, (117423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:39,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38139 states to 38139 states and 117423 transitions. [2021-04-15 02:23:39,040 INFO L78 Accepts]: Start accepts. Automaton has 38139 states and 117423 transitions. Word has length 22 [2021-04-15 02:23:39,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:39,040 INFO L480 AbstractCegarLoop]: Abstraction has 38139 states and 117423 transitions. [2021-04-15 02:23:39,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:23:39,040 INFO L276 IsEmpty]: Start isEmpty. Operand 38139 states and 117423 transitions. [2021-04-15 02:23:39,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:39,051 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:39,051 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:39,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10525,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:39,251 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:39,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:39,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1391216815, now seen corresponding path program 229 times [2021-04-15 02:23:39,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:39,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922339530] [2021-04-15 02:23:39,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:39,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:39,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922339530] [2021-04-15 02:23:39,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29166973] [2021-04-15 02:23:39,327 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 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 02:23:39,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:39,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:39,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:39,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:39,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:23:39,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390502266] [2021-04-15 02:23:39,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:23:39,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:39,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:23:39,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:23:39,398 INFO L87 Difference]: Start difference. First operand 38139 states and 117423 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:39,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:39,660 INFO L93 Difference]: Finished difference Result 38877 states and 119237 transitions. [2021-04-15 02:23:39,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:23:39,661 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-04-15 02:23:39,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:39,726 INFO L225 Difference]: With dead ends: 38877 [2021-04-15 02:23:39,726 INFO L226 Difference]: Without dead ends: 38877 [2021-04-15 02:23:39,726 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:23:39,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38877 states. [2021-04-15 02:23:40,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38877 to 37259. [2021-04-15 02:23:40,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37259 states, 37258 states have (on average 3.0800096623543936) internal successors, (114755), 37258 states have internal predecessors, (114755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:40,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37259 states to 37259 states and 114755 transitions. [2021-04-15 02:23:40,630 INFO L78 Accepts]: Start accepts. Automaton has 37259 states and 114755 transitions. Word has length 22 [2021-04-15 02:23:40,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:40,631 INFO L480 AbstractCegarLoop]: Abstraction has 37259 states and 114755 transitions. [2021-04-15 02:23:40,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:40,631 INFO L276 IsEmpty]: Start isEmpty. Operand 37259 states and 114755 transitions. [2021-04-15 02:23:40,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:40,640 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:40,640 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:40,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10526 [2021-04-15 02:23:40,840 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:40,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:40,841 INFO L82 PathProgramCache]: Analyzing trace with hash 123759637, now seen corresponding path program 230 times [2021-04-15 02:23:40,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:40,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129331186] [2021-04-15 02:23:40,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:40,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:40,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129331186] [2021-04-15 02:23:40,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719785927] [2021-04-15 02:23:40,919 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:40,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:23:40,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:40,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:40,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:40,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:40,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:23:40,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799996610] [2021-04-15 02:23:40,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:23:40,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:40,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:23:40,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:23:40,990 INFO L87 Difference]: Start difference. First operand 37259 states and 114755 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:41,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:41,347 INFO L93 Difference]: Finished difference Result 39004 states and 119600 transitions. [2021-04-15 02:23:41,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:23:41,348 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-04-15 02:23:41,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:41,420 INFO L225 Difference]: With dead ends: 39004 [2021-04-15 02:23:41,420 INFO L226 Difference]: Without dead ends: 39004 [2021-04-15 02:23:41,420 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 226.6ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:23:41,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39004 states. [2021-04-15 02:23:42,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39004 to 37661. [2021-04-15 02:23:42,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37661 states, 37660 states have (on average 3.0793414763674987) internal successors, (115968), 37660 states have internal predecessors, (115968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:42,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37661 states to 37661 states and 115968 transitions. [2021-04-15 02:23:42,372 INFO L78 Accepts]: Start accepts. Automaton has 37661 states and 115968 transitions. Word has length 22 [2021-04-15 02:23:42,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:42,372 INFO L480 AbstractCegarLoop]: Abstraction has 37661 states and 115968 transitions. [2021-04-15 02:23:42,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:42,372 INFO L276 IsEmpty]: Start isEmpty. Operand 37661 states and 115968 transitions. [2021-04-15 02:23:42,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:42,382 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:42,382 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:42,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10527,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:42,582 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:42,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:42,583 INFO L82 PathProgramCache]: Analyzing trace with hash -512707217, now seen corresponding path program 231 times [2021-04-15 02:23:42,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:42,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849087244] [2021-04-15 02:23:42,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:42,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849087244] [2021-04-15 02:23:42,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548865547] [2021-04-15 02:23:42,673 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 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 02:23:42,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:23:42,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:42,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:42,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:42,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:42,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:23:42,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965780398] [2021-04-15 02:23:42,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:23:42,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:42,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:23:42,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:23:42,770 INFO L87 Difference]: Start difference. First operand 37661 states and 115968 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:43,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:43,263 INFO L93 Difference]: Finished difference Result 39220 states and 120135 transitions. [2021-04-15 02:23:43,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 02:23:43,263 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-04-15 02:23:43,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:43,328 INFO L225 Difference]: With dead ends: 39220 [2021-04-15 02:23:43,328 INFO L226 Difference]: Without dead ends: 39220 [2021-04-15 02:23:43,329 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 343.9ms TimeCoverageRelationStatistics Valid=664, Invalid=1316, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 02:23:43,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39220 states. [2021-04-15 02:23:44,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39220 to 37458. [2021-04-15 02:23:44,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37458 states, 37457 states have (on average 3.08011853592119) internal successors, (115372), 37457 states have internal predecessors, (115372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:44,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37458 states to 37458 states and 115372 transitions. [2021-04-15 02:23:44,245 INFO L78 Accepts]: Start accepts. Automaton has 37458 states and 115372 transitions. Word has length 22 [2021-04-15 02:23:44,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:44,245 INFO L480 AbstractCegarLoop]: Abstraction has 37458 states and 115372 transitions. [2021-04-15 02:23:44,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:44,245 INFO L276 IsEmpty]: Start isEmpty. Operand 37458 states and 115372 transitions. [2021-04-15 02:23:44,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:44,255 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:44,255 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:44,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10528 [2021-04-15 02:23:44,456 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:44,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:44,456 INFO L82 PathProgramCache]: Analyzing trace with hash -2054510059, now seen corresponding path program 232 times [2021-04-15 02:23:44,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:44,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298826063] [2021-04-15 02:23:44,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:44,513 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:44,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298826063] [2021-04-15 02:23:44,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034553012] [2021-04-15 02:23:44,513 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 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 02:23:44,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:23:44,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:44,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:44,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:44,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:44,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:23:44,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781589168] [2021-04-15 02:23:44,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:44,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:44,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:44,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:44,575 INFO L87 Difference]: Start difference. First operand 37458 states and 115372 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 02:23:44,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:44,865 INFO L93 Difference]: Finished difference Result 37627 states and 115565 transitions. [2021-04-15 02:23:44,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:23:44,865 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 22 [2021-04-15 02:23:44,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:44,919 INFO L225 Difference]: With dead ends: 37627 [2021-04-15 02:23:44,919 INFO L226 Difference]: Without dead ends: 37623 [2021-04-15 02:23:44,919 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 138.3ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:23:44,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37623 states. [2021-04-15 02:23:45,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37623 to 37458. [2021-04-15 02:23:45,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37458 states, 37457 states have (on average 3.0800117468030006) internal successors, (115368), 37457 states have internal predecessors, (115368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:45,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37458 states to 37458 states and 115368 transitions. [2021-04-15 02:23:45,901 INFO L78 Accepts]: Start accepts. Automaton has 37458 states and 115368 transitions. Word has length 22 [2021-04-15 02:23:45,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:45,901 INFO L480 AbstractCegarLoop]: Abstraction has 37458 states and 115368 transitions. [2021-04-15 02:23:45,901 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 02:23:45,901 INFO L276 IsEmpty]: Start isEmpty. Operand 37458 states and 115368 transitions. [2021-04-15 02:23:45,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:45,911 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:45,911 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:46,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10529,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:46,111 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:46,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:46,112 INFO L82 PathProgramCache]: Analyzing trace with hash -324040043, now seen corresponding path program 233 times [2021-04-15 02:23:46,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:46,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397711875] [2021-04-15 02:23:46,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:46,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397711875] [2021-04-15 02:23:46,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215759571] [2021-04-15 02:23:46,193 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 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 02:23:46,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:23:46,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:46,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:46,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:46,264 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:46,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:46,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:23:46,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305719775] [2021-04-15 02:23:46,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:23:46,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:46,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:23:46,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:23:46,265 INFO L87 Difference]: Start difference. First operand 37458 states and 115368 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:46,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:46,661 INFO L93 Difference]: Finished difference Result 44126 states and 134929 transitions. [2021-04-15 02:23:46,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:23:46,662 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-04-15 02:23:46,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:46,735 INFO L225 Difference]: With dead ends: 44126 [2021-04-15 02:23:46,735 INFO L226 Difference]: Without dead ends: 44126 [2021-04-15 02:23:46,736 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 271.4ms TimeCoverageRelationStatistics Valid=509, Invalid=973, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 02:23:46,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44126 states. [2021-04-15 02:23:47,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44126 to 42198. [2021-04-15 02:23:47,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42198 states, 42197 states have (on average 3.0731331611251984) internal successors, (129677), 42197 states have internal predecessors, (129677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:47,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42198 states to 42198 states and 129677 transitions. [2021-04-15 02:23:47,735 INFO L78 Accepts]: Start accepts. Automaton has 42198 states and 129677 transitions. Word has length 22 [2021-04-15 02:23:47,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:47,735 INFO L480 AbstractCegarLoop]: Abstraction has 42198 states and 129677 transitions. [2021-04-15 02:23:47,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:47,735 INFO L276 IsEmpty]: Start isEmpty. Operand 42198 states and 129677 transitions. [2021-04-15 02:23:47,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:47,747 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:47,747 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:47,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10530 [2021-04-15 02:23:47,949 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:47,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:47,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1420323963, now seen corresponding path program 234 times [2021-04-15 02:23:47,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:47,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519068988] [2021-04-15 02:23:47,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:48,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519068988] [2021-04-15 02:23:48,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289733291] [2021-04-15 02:23:48,029 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 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 02:23:48,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:23:48,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:48,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:48,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:48,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:48,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:23:48,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102904054] [2021-04-15 02:23:48,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:23:48,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:48,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:23:48,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:23:48,101 INFO L87 Difference]: Start difference. First operand 42198 states and 129677 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:48,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:48,453 INFO L93 Difference]: Finished difference Result 46244 states and 141435 transitions. [2021-04-15 02:23:48,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:23:48,453 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-04-15 02:23:48,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:48,530 INFO L225 Difference]: With dead ends: 46244 [2021-04-15 02:23:48,530 INFO L226 Difference]: Without dead ends: 46244 [2021-04-15 02:23:48,531 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:23:48,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46244 states. [2021-04-15 02:23:49,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46244 to 45504. [2021-04-15 02:23:49,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45504 states, 45503 states have (on average 3.068566907676417) internal successors, (139629), 45503 states have internal predecessors, (139629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:49,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45504 states to 45504 states and 139629 transitions. [2021-04-15 02:23:49,454 INFO L78 Accepts]: Start accepts. Automaton has 45504 states and 139629 transitions. Word has length 22 [2021-04-15 02:23:49,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:49,454 INFO L480 AbstractCegarLoop]: Abstraction has 45504 states and 139629 transitions. [2021-04-15 02:23:49,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:49,454 INFO L276 IsEmpty]: Start isEmpty. Operand 45504 states and 139629 transitions. [2021-04-15 02:23:49,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:49,469 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:49,469 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:49,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10531 [2021-04-15 02:23:49,669 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:49,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:49,670 INFO L82 PathProgramCache]: Analyzing trace with hash 783857109, now seen corresponding path program 235 times [2021-04-15 02:23:49,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:49,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557443549] [2021-04-15 02:23:49,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:49,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557443549] [2021-04-15 02:23:49,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102227582] [2021-04-15 02:23:49,755 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 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 02:23:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:49,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:49,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:49,835 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:49,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:49,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:23:49,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895288936] [2021-04-15 02:23:49,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:23:49,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:49,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:23:49,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:23:49,836 INFO L87 Difference]: Start difference. First operand 45504 states and 139629 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:50,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:50,325 INFO L93 Difference]: Finished difference Result 47891 states and 146334 transitions. [2021-04-15 02:23:50,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 02:23:50,326 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-04-15 02:23:50,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:50,412 INFO L225 Difference]: With dead ends: 47891 [2021-04-15 02:23:50,412 INFO L226 Difference]: Without dead ends: 47891 [2021-04-15 02:23:50,412 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=614, Invalid=1192, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 02:23:50,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47891 states. [2021-04-15 02:23:51,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47891 to 46839. [2021-04-15 02:23:51,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46839 states, 46838 states have (on average 3.066612579529442) internal successors, (143634), 46838 states have internal predecessors, (143634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:51,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46839 states to 46839 states and 143634 transitions. [2021-04-15 02:23:51,407 INFO L78 Accepts]: Start accepts. Automaton has 46839 states and 143634 transitions. Word has length 22 [2021-04-15 02:23:51,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:51,407 INFO L480 AbstractCegarLoop]: Abstraction has 46839 states and 143634 transitions. [2021-04-15 02:23:51,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:23:51,407 INFO L276 IsEmpty]: Start isEmpty. Operand 46839 states and 143634 transitions. [2021-04-15 02:23:51,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:51,423 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:51,423 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:51,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10532 [2021-04-15 02:23:51,623 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:51,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:51,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1486004305, now seen corresponding path program 236 times [2021-04-15 02:23:51,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:51,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686453383] [2021-04-15 02:23:51,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:51,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686453383] [2021-04-15 02:23:51,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837338445] [2021-04-15 02:23:51,683 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 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 02:23:51,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:23:51,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:51,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:51,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:51,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:51,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:23:51,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205259558] [2021-04-15 02:23:51,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:51,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:51,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:51,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:51,744 INFO L87 Difference]: Start difference. First operand 46839 states and 143634 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 02:23:52,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:52,048 INFO L93 Difference]: Finished difference Result 47040 states and 143931 transitions. [2021-04-15 02:23:52,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:23:52,048 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 22 [2021-04-15 02:23:52,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:52,138 INFO L225 Difference]: With dead ends: 47040 [2021-04-15 02:23:52,139 INFO L226 Difference]: Without dead ends: 47036 [2021-04-15 02:23:52,139 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:23:52,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47036 states. [2021-04-15 02:23:53,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47036 to 46875. [2021-04-15 02:23:53,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46875 states, 46874 states have (on average 3.066646755130776) internal successors, (143746), 46874 states have internal predecessors, (143746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:53,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46875 states to 46875 states and 143746 transitions. [2021-04-15 02:23:53,217 INFO L78 Accepts]: Start accepts. Automaton has 46875 states and 143746 transitions. Word has length 22 [2021-04-15 02:23:53,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:53,217 INFO L480 AbstractCegarLoop]: Abstraction has 46875 states and 143746 transitions. [2021-04-15 02:23:53,217 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 02:23:53,217 INFO L276 IsEmpty]: Start isEmpty. Operand 46875 states and 143746 transitions. [2021-04-15 02:23:53,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:53,231 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:53,231 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:53,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10533,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:53,432 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:53,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:53,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1091213931, now seen corresponding path program 237 times [2021-04-15 02:23:53,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:53,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890384351] [2021-04-15 02:23:53,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:53,490 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:53,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890384351] [2021-04-15 02:23:53,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241270708] [2021-04-15 02:23:53,491 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 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 02:23:53,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:23:53,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:53,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:53,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:53,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:53,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:23:53,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591217722] [2021-04-15 02:23:53,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:53,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:53,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:53,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:53,557 INFO L87 Difference]: Start difference. First operand 46875 states and 143746 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 02:23:53,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:53,797 INFO L93 Difference]: Finished difference Result 47717 states and 145917 transitions. [2021-04-15 02:23:53,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:23:53,797 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 22 [2021-04-15 02:23:53,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:53,869 INFO L225 Difference]: With dead ends: 47717 [2021-04-15 02:23:53,869 INFO L226 Difference]: Without dead ends: 47717 [2021-04-15 02:23:53,869 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:23:53,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47717 states. [2021-04-15 02:23:54,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47717 to 46880. [2021-04-15 02:23:54,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46880 states, 46879 states have (on average 3.066639646750144) internal successors, (143761), 46879 states have internal predecessors, (143761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:54,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46880 states to 46880 states and 143761 transitions. [2021-04-15 02:23:54,924 INFO L78 Accepts]: Start accepts. Automaton has 46880 states and 143761 transitions. Word has length 22 [2021-04-15 02:23:54,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:54,924 INFO L480 AbstractCegarLoop]: Abstraction has 46880 states and 143761 transitions. [2021-04-15 02:23:54,924 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 02:23:54,925 INFO L276 IsEmpty]: Start isEmpty. Operand 46880 states and 143761 transitions. [2021-04-15 02:23:54,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:54,941 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:54,941 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:55,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10534 [2021-04-15 02:23:55,141 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:55,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:55,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1474706031, now seen corresponding path program 238 times [2021-04-15 02:23:55,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:55,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908618637] [2021-04-15 02:23:55,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:55,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:55,201 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:55,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908618637] [2021-04-15 02:23:55,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860283753] [2021-04-15 02:23:55,201 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 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 02:23:55,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:23:55,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:55,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:55,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:55,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:55,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:55,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565364207] [2021-04-15 02:23:55,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:55,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:55,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:55,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:55,274 INFO L87 Difference]: Start difference. First operand 46880 states and 143761 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 02:23:55,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:55,551 INFO L93 Difference]: Finished difference Result 48348 states and 147772 transitions. [2021-04-15 02:23:55,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:23:55,552 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 22 [2021-04-15 02:23:55,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:55,641 INFO L225 Difference]: With dead ends: 48348 [2021-04-15 02:23:55,641 INFO L226 Difference]: Without dead ends: 48348 [2021-04-15 02:23:55,641 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:23:56,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48348 states. [2021-04-15 02:23:56,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48348 to 46887. [2021-04-15 02:23:56,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46887 states, 46886 states have (on average 3.066608369236019) internal successors, (143781), 46886 states have internal predecessors, (143781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:56,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46887 states to 46887 states and 143781 transitions. [2021-04-15 02:23:56,668 INFO L78 Accepts]: Start accepts. Automaton has 46887 states and 143781 transitions. Word has length 22 [2021-04-15 02:23:56,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:56,668 INFO L480 AbstractCegarLoop]: Abstraction has 46887 states and 143781 transitions. [2021-04-15 02:23:56,668 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 02:23:56,668 INFO L276 IsEmpty]: Start isEmpty. Operand 46887 states and 143781 transitions. [2021-04-15 02:23:56,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:56,683 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:56,683 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:56,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10535 [2021-04-15 02:23:56,883 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:56,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:56,883 INFO L82 PathProgramCache]: Analyzing trace with hash -586153771, now seen corresponding path program 239 times [2021-04-15 02:23:56,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:56,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669140124] [2021-04-15 02:23:56,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:56,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669140124] [2021-04-15 02:23:56,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023506966] [2021-04-15 02:23:56,944 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 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 02:23:56,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:23:56,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:56,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:56,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:57,014 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:57,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:57,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:57,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567525928] [2021-04-15 02:23:57,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:57,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:57,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:57,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:57,015 INFO L87 Difference]: Start difference. First operand 46887 states and 143781 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 02:23:57,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:57,616 INFO L93 Difference]: Finished difference Result 64639 states and 196977 transitions. [2021-04-15 02:23:57,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:23:57,616 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 22 [2021-04-15 02:23:57,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:57,723 INFO L225 Difference]: With dead ends: 64639 [2021-04-15 02:23:57,723 INFO L226 Difference]: Without dead ends: 64639 [2021-04-15 02:23:57,724 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=253, Invalid=449, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:23:57,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64639 states. [2021-04-15 02:23:58,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64639 to 61565. [2021-04-15 02:23:58,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61565 states, 61564 states have (on average 3.058508219089078) internal successors, (188294), 61564 states have internal predecessors, (188294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:58,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61565 states to 61565 states and 188294 transitions. [2021-04-15 02:23:58,945 INFO L78 Accepts]: Start accepts. Automaton has 61565 states and 188294 transitions. Word has length 22 [2021-04-15 02:23:58,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:58,945 INFO L480 AbstractCegarLoop]: Abstraction has 61565 states and 188294 transitions. [2021-04-15 02:23:58,945 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 02:23:58,945 INFO L276 IsEmpty]: Start isEmpty. Operand 61565 states and 188294 transitions. [2021-04-15 02:23:58,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:23:58,962 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:58,963 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:59,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10536,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:59,163 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:59,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:59,163 INFO L82 PathProgramCache]: Analyzing trace with hash -48298193, now seen corresponding path program 240 times [2021-04-15 02:23:59,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:59,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165606120] [2021-04-15 02:23:59,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:59,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:59,231 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:59,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165606120] [2021-04-15 02:23:59,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064131213] [2021-04-15 02:23:59,231 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 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 02:23:59,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:23:59,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:59,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:23:59,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:59,300 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:59,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:59,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:23:59,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823281177] [2021-04-15 02:23:59,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:23:59,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:59,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:23:59,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:23:59,301 INFO L87 Difference]: Start difference. First operand 61565 states and 188294 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:23:59,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:59,662 INFO L93 Difference]: Finished difference Result 64066 states and 195284 transitions. [2021-04-15 02:23:59,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:23:59,663 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:23:59,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:59,784 INFO L225 Difference]: With dead ends: 64066 [2021-04-15 02:23:59,785 INFO L226 Difference]: Without dead ends: 64066 [2021-04-15 02:23:59,785 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 153.5ms TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:23:59,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64066 states. [2021-04-15 02:24:00,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64066 to 61726. [2021-04-15 02:24:01,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61726 states, 61725 states have (on average 3.0580639935196436) internal successors, (188759), 61725 states have internal predecessors, (188759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:01,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61726 states to 61726 states and 188759 transitions. [2021-04-15 02:24:01,170 INFO L78 Accepts]: Start accepts. Automaton has 61726 states and 188759 transitions. Word has length 22 [2021-04-15 02:24:01,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:01,170 INFO L480 AbstractCegarLoop]: Abstraction has 61726 states and 188759 transitions. [2021-04-15 02:24:01,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:24:01,170 INFO L276 IsEmpty]: Start isEmpty. Operand 61726 states and 188759 transitions. [2021-04-15 02:24:01,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:24:01,190 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:01,190 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:01,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10537,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:01,391 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:01,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:01,391 INFO L82 PathProgramCache]: Analyzing trace with hash -554644459, now seen corresponding path program 241 times [2021-04-15 02:24:01,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:01,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475196605] [2021-04-15 02:24:01,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:01,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:01,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475196605] [2021-04-15 02:24:01,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145002551] [2021-04-15 02:24:01,461 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 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 02:24:01,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:01,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:24:01,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:01,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:01,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:24:01,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900113130] [2021-04-15 02:24:01,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:01,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:01,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:01,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:01,535 INFO L87 Difference]: Start difference. First operand 61726 states and 188759 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:24:02,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:02,195 INFO L93 Difference]: Finished difference Result 73057 states and 222493 transitions. [2021-04-15 02:24:02,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:24:02,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:24:02,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:02,326 INFO L225 Difference]: With dead ends: 73057 [2021-04-15 02:24:02,327 INFO L226 Difference]: Without dead ends: 73057 [2021-04-15 02:24:02,327 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:24:02,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73057 states. [2021-04-15 02:24:03,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73057 to 71622. [2021-04-15 02:24:03,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71622 states, 71621 states have (on average 3.051926111056813) internal successors, (218582), 71621 states have internal predecessors, (218582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:03,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71622 states to 71622 states and 218582 transitions. [2021-04-15 02:24:03,752 INFO L78 Accepts]: Start accepts. Automaton has 71622 states and 218582 transitions. Word has length 22 [2021-04-15 02:24:03,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:03,752 INFO L480 AbstractCegarLoop]: Abstraction has 71622 states and 218582 transitions. [2021-04-15 02:24:03,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:24:03,752 INFO L276 IsEmpty]: Start isEmpty. Operand 71622 states and 218582 transitions. [2021-04-15 02:24:03,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:24:03,772 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:03,772 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:03,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10538 [2021-04-15 02:24:03,973 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:03,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:03,973 INFO L82 PathProgramCache]: Analyzing trace with hash 928490479, now seen corresponding path program 242 times [2021-04-15 02:24:03,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:03,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835694833] [2021-04-15 02:24:03,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:04,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835694833] [2021-04-15 02:24:04,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720863406] [2021-04-15 02:24:04,047 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 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 02:24:04,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:24:04,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:04,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:24:04,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:04,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:04,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:24:04,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872889702] [2021-04-15 02:24:04,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:04,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:04,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:04,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:04,117 INFO L87 Difference]: Start difference. First operand 71622 states and 218582 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:24:04,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:04,480 INFO L93 Difference]: Finished difference Result 76219 states and 232111 transitions. [2021-04-15 02:24:04,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:24:04,481 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-04-15 02:24:04,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:04,643 INFO L225 Difference]: With dead ends: 76219 [2021-04-15 02:24:04,643 INFO L226 Difference]: Without dead ends: 76219 [2021-04-15 02:24:04,643 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:24:04,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76219 states. [2021-04-15 02:24:06,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76219 to 75735. [2021-04-15 02:24:06,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75735 states, 75734 states have (on average 3.0491588982491353) internal successors, (230925), 75734 states have internal predecessors, (230925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:06,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75735 states to 75735 states and 230925 transitions. [2021-04-15 02:24:06,837 INFO L78 Accepts]: Start accepts. Automaton has 75735 states and 230925 transitions. Word has length 22 [2021-04-15 02:24:06,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:06,837 INFO L480 AbstractCegarLoop]: Abstraction has 75735 states and 230925 transitions. [2021-04-15 02:24:06,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:24:06,837 INFO L276 IsEmpty]: Start isEmpty. Operand 75735 states and 230925 transitions. [2021-04-15 02:24:06,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:24:06,865 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:06,865 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:07,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10539,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:07,084 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:07,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:07,085 INFO L82 PathProgramCache]: Analyzing trace with hash -338966699, now seen corresponding path program 243 times [2021-04-15 02:24:07,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:07,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755026472] [2021-04-15 02:24:07,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:07,198 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:07,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755026472] [2021-04-15 02:24:07,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6106973] [2021-04-15 02:24:07,199 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:24:07,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:24:07,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:07,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:24:07,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:07,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:07,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:24:07,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536562401] [2021-04-15 02:24:07,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:24:07,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:07,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:24:07,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:24:07,295 INFO L87 Difference]: Start difference. First operand 75735 states and 230925 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:24:07,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:07,743 INFO L93 Difference]: Finished difference Result 76769 states and 233709 transitions. [2021-04-15 02:24:07,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:24:07,743 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-04-15 02:24:07,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:07,891 INFO L225 Difference]: With dead ends: 76769 [2021-04-15 02:24:07,891 INFO L226 Difference]: Without dead ends: 76769 [2021-04-15 02:24:07,891 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 227.5ms TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:24:07,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76769 states. [2021-04-15 02:24:09,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76769 to 75772. [2021-04-15 02:24:09,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75772 states, 75771 states have (on average 3.0491348932969076) internal successors, (231036), 75771 states have internal predecessors, (231036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:09,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75772 states to 75772 states and 231036 transitions. [2021-04-15 02:24:09,489 INFO L78 Accepts]: Start accepts. Automaton has 75772 states and 231036 transitions. Word has length 22 [2021-04-15 02:24:09,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:09,490 INFO L480 AbstractCegarLoop]: Abstraction has 75772 states and 231036 transitions. [2021-04-15 02:24:09,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:24:09,490 INFO L276 IsEmpty]: Start isEmpty. Operand 75772 states and 231036 transitions. [2021-04-15 02:24:09,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:24:09,511 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:09,511 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:09,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10540 [2021-04-15 02:24:09,711 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:09,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:09,712 INFO L82 PathProgramCache]: Analyzing trace with hash -975433553, now seen corresponding path program 244 times [2021-04-15 02:24:09,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:09,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045915697] [2021-04-15 02:24:09,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:09,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:09,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045915697] [2021-04-15 02:24:09,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922455279] [2021-04-15 02:24:09,797 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 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 02:24:09,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:24:09,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:09,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:24:09,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:09,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:09,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:24:09,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905675679] [2021-04-15 02:24:09,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:24:09,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:09,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:24:09,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:24:09,869 INFO L87 Difference]: Start difference. First operand 75772 states and 231036 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:24:10,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:10,636 INFO L93 Difference]: Finished difference Result 77589 states and 236129 transitions. [2021-04-15 02:24:10,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:24:10,636 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-04-15 02:24:10,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:10,792 INFO L225 Difference]: With dead ends: 77589 [2021-04-15 02:24:10,792 INFO L226 Difference]: Without dead ends: 77589 [2021-04-15 02:24:10,792 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 265.7ms TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:24:10,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77589 states. [2021-04-15 02:24:12,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77589 to 76898. [2021-04-15 02:24:12,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76898 states, 76897 states have (on average 3.048415412824948) internal successors, (234414), 76897 states have internal predecessors, (234414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:12,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76898 states to 76898 states and 234414 transitions. [2021-04-15 02:24:12,336 INFO L78 Accepts]: Start accepts. Automaton has 76898 states and 234414 transitions. Word has length 22 [2021-04-15 02:24:12,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:12,336 INFO L480 AbstractCegarLoop]: Abstraction has 76898 states and 234414 transitions. [2021-04-15 02:24:12,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:24:12,336 INFO L276 IsEmpty]: Start isEmpty. Operand 76898 states and 234414 transitions. [2021-04-15 02:24:12,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:24:12,359 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:12,359 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:12,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10541,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:12,560 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:12,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:12,560 INFO L82 PathProgramCache]: Analyzing trace with hash 768930453, now seen corresponding path program 245 times [2021-04-15 02:24:12,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:12,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126799001] [2021-04-15 02:24:12,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:12,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126799001] [2021-04-15 02:24:12,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172157931] [2021-04-15 02:24:12,652 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 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 02:24:12,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:24:12,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:12,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:24:12,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:12,726 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:12,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:12,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:24:12,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452801700] [2021-04-15 02:24:12,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:24:12,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:12,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:24:12,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:24:12,727 INFO L87 Difference]: Start difference. First operand 76898 states and 234414 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:24:13,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:13,689 INFO L93 Difference]: Finished difference Result 78959 states and 240117 transitions. [2021-04-15 02:24:13,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 02:24:13,690 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-04-15 02:24:13,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:13,840 INFO L225 Difference]: With dead ends: 78959 [2021-04-15 02:24:13,840 INFO L226 Difference]: Without dead ends: 78959 [2021-04-15 02:24:13,841 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 343.6ms TimeCoverageRelationStatistics Valid=664, Invalid=1316, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 02:24:13,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78959 states. [2021-04-15 02:24:15,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78959 to 77340. [2021-04-15 02:24:15,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77340 states, 77339 states have (on average 3.048138713973545) internal successors, (235740), 77339 states have internal predecessors, (235740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:15,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77340 states to 77340 states and 235740 transitions. [2021-04-15 02:24:15,329 INFO L78 Accepts]: Start accepts. Automaton has 77340 states and 235740 transitions. Word has length 22 [2021-04-15 02:24:15,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:15,329 INFO L480 AbstractCegarLoop]: Abstraction has 77340 states and 235740 transitions. [2021-04-15 02:24:15,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 02:24:15,329 INFO L276 IsEmpty]: Start isEmpty. Operand 77340 states and 235740 transitions. [2021-04-15 02:24:15,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:24:15,349 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:15,349 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:15,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10542 [2021-04-15 02:24:15,550 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:15,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:15,550 INFO L82 PathProgramCache]: Analyzing trace with hash -928937975, now seen corresponding path program 246 times [2021-04-15 02:24:15,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:15,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817228196] [2021-04-15 02:24:15,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:15,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817228196] [2021-04-15 02:24:15,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872268927] [2021-04-15 02:24:15,652 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 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 02:24:15,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:24:15,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:15,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:24:15,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:15,719 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:15,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:15,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-04-15 02:24:15,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259737666] [2021-04-15 02:24:15,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:24:15,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:15,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:24:15,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:24:15,720 INFO L87 Difference]: Start difference. First operand 77340 states and 235740 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 02:24:16,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:16,286 INFO L93 Difference]: Finished difference Result 77569 states and 236048 transitions. [2021-04-15 02:24:16,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:24:16,287 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 22 [2021-04-15 02:24:16,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:16,456 INFO L225 Difference]: With dead ends: 77569 [2021-04-15 02:24:16,456 INFO L226 Difference]: Without dead ends: 77563 [2021-04-15 02:24:16,456 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 264.5ms TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:24:16,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77563 states. [2021-04-15 02:24:18,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77563 to 77255. [2021-04-15 02:24:18,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77255 states, 77254 states have (on average 3.0479198488104178) internal successors, (235464), 77254 states have internal predecessors, (235464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:18,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77255 states to 77255 states and 235464 transitions. [2021-04-15 02:24:18,279 INFO L78 Accepts]: Start accepts. Automaton has 77255 states and 235464 transitions. Word has length 22 [2021-04-15 02:24:18,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:18,279 INFO L480 AbstractCegarLoop]: Abstraction has 77255 states and 235464 transitions. [2021-04-15 02:24:18,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 02:24:18,279 INFO L276 IsEmpty]: Start isEmpty. Operand 77255 states and 235464 transitions. [2021-04-15 02:24:18,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:24:18,307 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:18,307 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:18,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10543,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:18,509 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:18,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:18,509 INFO L82 PathProgramCache]: Analyzing trace with hash -879550451, now seen corresponding path program 247 times [2021-04-15 02:24:18,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:18,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141921683] [2021-04-15 02:24:18,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:18,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141921683] [2021-04-15 02:24:18,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424066153] [2021-04-15 02:24:18,589 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 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 02:24:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:18,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:24:18,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:18,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:18,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-04-15 02:24:18,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854546010] [2021-04-15 02:24:18,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:24:18,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:18,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:24:18,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:24:18,669 INFO L87 Difference]: Start difference. First operand 77255 states and 235464 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 02:24:19,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:19,239 INFO L93 Difference]: Finished difference Result 105545 states and 320390 transitions. [2021-04-15 02:24:19,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:24:19,240 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 22 [2021-04-15 02:24:19,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:19,463 INFO L225 Difference]: With dead ends: 105545 [2021-04-15 02:24:19,463 INFO L226 Difference]: Without dead ends: 105545 [2021-04-15 02:24:19,464 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 244.8ms TimeCoverageRelationStatistics Valid=404, Invalid=786, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:24:19,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105545 states. [2021-04-15 02:24:21,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105545 to 103725. [2021-04-15 02:24:21,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103725 states, 103724 states have (on average 3.03849639427712) internal successors, (315165), 103724 states have internal predecessors, (315165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:21,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103725 states to 103725 states and 315165 transitions. [2021-04-15 02:24:21,946 INFO L78 Accepts]: Start accepts. Automaton has 103725 states and 315165 transitions. Word has length 22 [2021-04-15 02:24:21,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:21,946 INFO L480 AbstractCegarLoop]: Abstraction has 103725 states and 315165 transitions. [2021-04-15 02:24:21,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 02:24:21,946 INFO L276 IsEmpty]: Start isEmpty. Operand 103725 states and 315165 transitions. [2021-04-15 02:24:21,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:24:21,980 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:21,980 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:22,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10544 [2021-04-15 02:24:22,180 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:22,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:22,180 INFO L82 PathProgramCache]: Analyzing trace with hash 603584487, now seen corresponding path program 248 times [2021-04-15 02:24:22,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:22,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435085805] [2021-04-15 02:24:22,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:22,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435085805] [2021-04-15 02:24:22,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977053592] [2021-04-15 02:24:22,269 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 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 02:24:22,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:24:22,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:22,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:24:22,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:22,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:22,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:24:22,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334145568] [2021-04-15 02:24:22,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:24:22,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:22,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:24:22,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:24:22,350 INFO L87 Difference]: Start difference. First operand 103725 states and 315165 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 02:24:23,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:23,048 INFO L93 Difference]: Finished difference Result 114469 states and 347083 transitions. [2021-04-15 02:24:23,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:24:23,049 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 22 [2021-04-15 02:24:23,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:23,829 INFO L225 Difference]: With dead ends: 114469 [2021-04-15 02:24:23,829 INFO L226 Difference]: Without dead ends: 114469 [2021-04-15 02:24:23,830 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 271.1ms TimeCoverageRelationStatistics Valid=445, Invalid=887, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:24:23,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114469 states. [2021-04-15 02:24:25,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114469 to 89851. [2021-04-15 02:24:25,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89851 states, 89850 states have (on average 3.041469115191987) internal successors, (273276), 89850 states have internal predecessors, (273276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:25,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89851 states to 89851 states and 273276 transitions. [2021-04-15 02:24:25,809 INFO L78 Accepts]: Start accepts. Automaton has 89851 states and 273276 transitions. Word has length 22 [2021-04-15 02:24:25,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:25,809 INFO L480 AbstractCegarLoop]: Abstraction has 89851 states and 273276 transitions. [2021-04-15 02:24:25,809 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 02:24:25,809 INFO L276 IsEmpty]: Start isEmpty. Operand 89851 states and 273276 transitions. [2021-04-15 02:24:25,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:24:25,835 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:25,835 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:26,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10545 [2021-04-15 02:24:26,035 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:26,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:26,036 INFO L82 PathProgramCache]: Analyzing trace with hash -663872691, now seen corresponding path program 249 times [2021-04-15 02:24:26,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:26,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142798389] [2021-04-15 02:24:26,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:26,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142798389] [2021-04-15 02:24:26,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634404429] [2021-04-15 02:24:26,143 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 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 02:24:26,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:24:26,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:26,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:24:26,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:26,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:26,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:24:26,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178645523] [2021-04-15 02:24:26,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:24:26,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:26,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:24:26,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:24:26,228 INFO L87 Difference]: Start difference. First operand 89851 states and 273276 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 02:24:27,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:27,373 INFO L93 Difference]: Finished difference Result 104983 states and 318293 transitions. [2021-04-15 02:24:27,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 02:24:27,373 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 22 [2021-04-15 02:24:27,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:27,615 INFO L225 Difference]: With dead ends: 104983 [2021-04-15 02:24:27,615 INFO L226 Difference]: Without dead ends: 104983 [2021-04-15 02:24:27,615 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 376.9ms TimeCoverageRelationStatistics Valid=732, Invalid=1430, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 02:24:27,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104983 states. [2021-04-15 02:24:29,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104983 to 90067. [2021-04-15 02:24:29,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90067 states, 90066 states have (on average 3.0419581196011816) internal successors, (273977), 90066 states have internal predecessors, (273977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:29,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90067 states to 90067 states and 273977 transitions. [2021-04-15 02:24:29,915 INFO L78 Accepts]: Start accepts. Automaton has 90067 states and 273977 transitions. Word has length 22 [2021-04-15 02:24:29,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:29,915 INFO L480 AbstractCegarLoop]: Abstraction has 90067 states and 273977 transitions. [2021-04-15 02:24:29,915 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 02:24:29,915 INFO L276 IsEmpty]: Start isEmpty. Operand 90067 states and 273977 transitions. [2021-04-15 02:24:29,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:24:29,944 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:29,944 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:30,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10546 [2021-04-15 02:24:30,145 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:30,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:30,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1300339545, now seen corresponding path program 250 times [2021-04-15 02:24:30,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:30,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010976196] [2021-04-15 02:24:30,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:30,240 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:30,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010976196] [2021-04-15 02:24:30,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934294607] [2021-04-15 02:24:30,241 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 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 02:24:30,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:24:30,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:30,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:24:30,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:30,321 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:30,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:30,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:24:30,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768515438] [2021-04-15 02:24:30,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:24:30,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:30,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:24:30,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:24:30,322 INFO L87 Difference]: Start difference. First operand 90067 states and 273977 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 02:24:31,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:31,189 INFO L93 Difference]: Finished difference Result 104672 states and 317280 transitions. [2021-04-15 02:24:31,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-15 02:24:31,190 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 22 [2021-04-15 02:24:31,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:31,426 INFO L225 Difference]: With dead ends: 104672 [2021-04-15 02:24:31,426 INFO L226 Difference]: Without dead ends: 104672 [2021-04-15 02:24:31,426 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 464.0ms TimeCoverageRelationStatistics Valid=993, Invalid=1977, Unknown=0, NotChecked=0, Total=2970 [2021-04-15 02:24:31,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104672 states. [2021-04-15 02:24:33,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104672 to 90821. [2021-04-15 02:24:33,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90821 states, 90820 states have (on average 3.041995155252147) internal successors, (276274), 90820 states have internal predecessors, (276274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:33,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90821 states to 90821 states and 276274 transitions. [2021-04-15 02:24:33,690 INFO L78 Accepts]: Start accepts. Automaton has 90821 states and 276274 transitions. Word has length 22 [2021-04-15 02:24:33,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:33,690 INFO L480 AbstractCegarLoop]: Abstraction has 90821 states and 276274 transitions. [2021-04-15 02:24:33,690 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 02:24:33,690 INFO L276 IsEmpty]: Start isEmpty. Operand 90821 states and 276274 transitions. [2021-04-15 02:24:33,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:24:33,721 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:33,721 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:33,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10547 [2021-04-15 02:24:33,942 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:33,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:33,943 INFO L82 PathProgramCache]: Analyzing trace with hash 632691635, now seen corresponding path program 251 times [2021-04-15 02:24:33,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:33,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307872931] [2021-04-15 02:24:33,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:34,045 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:34,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307872931] [2021-04-15 02:24:34,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792498114] [2021-04-15 02:24:34,046 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 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 02:24:34,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:24:34,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:34,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:24:34,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:34,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:34,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:24:34,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722156466] [2021-04-15 02:24:34,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:24:34,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:34,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:24:34,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:24:34,127 INFO L87 Difference]: Start difference. First operand 90821 states and 276274 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 02:24:34,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:34,892 INFO L93 Difference]: Finished difference Result 105621 states and 320343 transitions. [2021-04-15 02:24:34,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 02:24:34,893 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 22 [2021-04-15 02:24:34,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:35,117 INFO L225 Difference]: With dead ends: 105621 [2021-04-15 02:24:35,118 INFO L226 Difference]: Without dead ends: 105621 [2021-04-15 02:24:35,118 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 365.1ms TimeCoverageRelationStatistics Valid=670, Invalid=1310, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 02:24:35,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105621 states. [2021-04-15 02:24:37,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105621 to 87948. [2021-04-15 02:24:37,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87948 states, 87947 states have (on average 3.0435716965899915) internal successors, (267673), 87947 states have internal predecessors, (267673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:37,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87948 states to 87948 states and 267673 transitions. [2021-04-15 02:24:37,468 INFO L78 Accepts]: Start accepts. Automaton has 87948 states and 267673 transitions. Word has length 22 [2021-04-15 02:24:37,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:37,468 INFO L480 AbstractCegarLoop]: Abstraction has 87948 states and 267673 transitions. [2021-04-15 02:24:37,468 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 02:24:37,468 INFO L276 IsEmpty]: Start isEmpty. Operand 87948 states and 267673 transitions. [2021-04-15 02:24:37,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:24:37,494 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:37,494 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:37,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10548,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:37,695 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:37,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:37,696 INFO L82 PathProgramCache]: Analyzing trace with hash -3775219, now seen corresponding path program 252 times [2021-04-15 02:24:37,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:37,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914404843] [2021-04-15 02:24:37,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:37,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914404843] [2021-04-15 02:24:37,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217376370] [2021-04-15 02:24:37,792 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 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 02:24:37,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:24:37,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:37,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:24:37,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:37,876 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:37,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:37,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:24:37,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535095682] [2021-04-15 02:24:37,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:24:37,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:37,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:24:37,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:24:37,877 INFO L87 Difference]: Start difference. First operand 87948 states and 267673 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 02:24:38,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:38,701 INFO L93 Difference]: Finished difference Result 96355 states and 292373 transitions. [2021-04-15 02:24:38,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 02:24:38,703 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 22 [2021-04-15 02:24:38,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:39,367 INFO L225 Difference]: With dead ends: 96355 [2021-04-15 02:24:39,367 INFO L226 Difference]: Without dead ends: 96355 [2021-04-15 02:24:39,368 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 457.9ms TimeCoverageRelationStatistics Valid=929, Invalid=1827, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 02:24:39,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96355 states. [2021-04-15 02:24:40,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96355 to 89848. [2021-04-15 02:24:40,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89848 states, 89847 states have (on average 3.042728193484479) internal successors, (273380), 89847 states have internal predecessors, (273380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:41,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89848 states to 89848 states and 273380 transitions. [2021-04-15 02:24:41,062 INFO L78 Accepts]: Start accepts. Automaton has 89848 states and 273380 transitions. Word has length 22 [2021-04-15 02:24:41,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:41,062 INFO L480 AbstractCegarLoop]: Abstraction has 89848 states and 273380 transitions. [2021-04-15 02:24:41,062 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 02:24:41,062 INFO L276 IsEmpty]: Start isEmpty. Operand 89848 states and 273380 transitions. [2021-04-15 02:24:41,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:24:41,093 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:41,093 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:41,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10549,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:41,295 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:41,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:41,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1342276787, now seen corresponding path program 253 times [2021-04-15 02:24:41,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:41,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934122205] [2021-04-15 02:24:41,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:41,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934122205] [2021-04-15 02:24:41,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627922477] [2021-04-15 02:24:41,376 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 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 02:24:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:41,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:24:41,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:41,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:41,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-04-15 02:24:41,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380766875] [2021-04-15 02:24:41,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:24:41,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:41,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:24:41,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:24:41,460 INFO L87 Difference]: Start difference. First operand 89848 states and 273380 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 02:24:42,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:42,365 INFO L93 Difference]: Finished difference Result 91563 states and 278140 transitions. [2021-04-15 02:24:42,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:24:42,366 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 22 [2021-04-15 02:24:42,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:42,595 INFO L225 Difference]: With dead ends: 91563 [2021-04-15 02:24:42,595 INFO L226 Difference]: Without dead ends: 91563 [2021-04-15 02:24:42,596 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 247.0ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:24:42,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91563 states. [2021-04-15 02:24:44,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91563 to 85666. [2021-04-15 02:24:44,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85666 states, 85665 states have (on average 3.044347166287282) internal successors, (260794), 85665 states have internal predecessors, (260794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:44,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85666 states to 85666 states and 260794 transitions. [2021-04-15 02:24:44,298 INFO L78 Accepts]: Start accepts. Automaton has 85666 states and 260794 transitions. Word has length 22 [2021-04-15 02:24:44,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:44,298 INFO L480 AbstractCegarLoop]: Abstraction has 85666 states and 260794 transitions. [2021-04-15 02:24:44,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 02:24:44,298 INFO L276 IsEmpty]: Start isEmpty. Operand 85666 states and 260794 transitions. [2021-04-15 02:24:44,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:24:44,320 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:44,321 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:44,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10550 [2021-04-15 02:24:44,521 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:44,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:44,521 INFO L82 PathProgramCache]: Analyzing trace with hash 140858151, now seen corresponding path program 254 times [2021-04-15 02:24:44,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:44,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028734185] [2021-04-15 02:24:44,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:44,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028734185] [2021-04-15 02:24:44,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106693274] [2021-04-15 02:24:44,616 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 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 02:24:44,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:24:44,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:44,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:24:44,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:44,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:44,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-04-15 02:24:44,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719506271] [2021-04-15 02:24:44,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:24:44,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:44,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:24:44,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:24:44,706 INFO L87 Difference]: Start difference. First operand 85666 states and 260794 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 02:24:45,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:45,228 INFO L93 Difference]: Finished difference Result 90021 states and 273590 transitions. [2021-04-15 02:24:45,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:24:45,228 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 22 [2021-04-15 02:24:45,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:45,877 INFO L225 Difference]: With dead ends: 90021 [2021-04-15 02:24:45,877 INFO L226 Difference]: Without dead ends: 90021 [2021-04-15 02:24:45,877 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 243.7ms TimeCoverageRelationStatistics Valid=323, Invalid=733, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:24:45,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90021 states. [2021-04-15 02:24:47,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90021 to 89587. [2021-04-15 02:24:47,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89587 states, 89586 states have (on average 3.0424173419954013) internal successors, (272558), 89586 states have internal predecessors, (272558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:47,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89587 states to 89587 states and 272558 transitions. [2021-04-15 02:24:47,511 INFO L78 Accepts]: Start accepts. Automaton has 89587 states and 272558 transitions. Word has length 22 [2021-04-15 02:24:47,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:47,511 INFO L480 AbstractCegarLoop]: Abstraction has 89587 states and 272558 transitions. [2021-04-15 02:24:47,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 02:24:47,511 INFO L276 IsEmpty]: Start isEmpty. Operand 89587 states and 272558 transitions. [2021-04-15 02:24:47,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:24:47,536 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:47,536 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:47,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10551,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:47,741 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:47,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:47,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1126599027, now seen corresponding path program 255 times [2021-04-15 02:24:47,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:47,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445999922] [2021-04-15 02:24:47,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:47,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445999922] [2021-04-15 02:24:47,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563980924] [2021-04-15 02:24:47,835 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 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 02:24:47,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:24:47,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:47,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:24:47,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:47,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:47,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:24:47,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165430673] [2021-04-15 02:24:47,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:24:47,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:47,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:24:47,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:24:47,929 INFO L87 Difference]: Start difference. First operand 89587 states and 272558 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 02:24:48,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:48,582 INFO L93 Difference]: Finished difference Result 91085 states and 276674 transitions. [2021-04-15 02:24:48,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:24:48,583 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 22 [2021-04-15 02:24:48,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:49,158 INFO L225 Difference]: With dead ends: 91085 [2021-04-15 02:24:49,158 INFO L226 Difference]: Without dead ends: 91085 [2021-04-15 02:24:49,158 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 321.7ms TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 02:24:49,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91085 states. [2021-04-15 02:24:50,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91085 to 87184. [2021-04-15 02:24:50,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87184 states, 87183 states have (on average 3.043563538763291) internal successors, (265347), 87183 states have internal predecessors, (265347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:50,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87184 states to 87184 states and 265347 transitions. [2021-04-15 02:24:50,755 INFO L78 Accepts]: Start accepts. Automaton has 87184 states and 265347 transitions. Word has length 22 [2021-04-15 02:24:50,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:50,755 INFO L480 AbstractCegarLoop]: Abstraction has 87184 states and 265347 transitions. [2021-04-15 02:24:50,756 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 02:24:50,756 INFO L276 IsEmpty]: Start isEmpty. Operand 87184 states and 265347 transitions. [2021-04-15 02:24:50,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:24:50,778 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:50,779 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:50,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10552 [2021-04-15 02:24:50,980 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:50,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:50,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1763065881, now seen corresponding path program 256 times [2021-04-15 02:24:50,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:50,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047096471] [2021-04-15 02:24:50,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:51,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047096471] [2021-04-15 02:24:51,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65631000] [2021-04-15 02:24:51,093 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 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 02:24:51,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:24:51,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:51,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:24:51,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:51,175 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:51,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:51,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:24:51,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699181696] [2021-04-15 02:24:51,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:24:51,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:51,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:24:51,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:24:51,176 INFO L87 Difference]: Start difference. First operand 87184 states and 265347 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 02:24:51,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:51,889 INFO L93 Difference]: Finished difference Result 89148 states and 270843 transitions. [2021-04-15 02:24:51,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 02:24:51,889 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 22 [2021-04-15 02:24:51,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:52,510 INFO L225 Difference]: With dead ends: 89148 [2021-04-15 02:24:52,510 INFO L226 Difference]: Without dead ends: 89148 [2021-04-15 02:24:52,510 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 415.6ms TimeCoverageRelationStatistics Valid=790, Invalid=1562, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 02:24:52,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89148 states. [2021-04-15 02:24:53,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89148 to 87528. [2021-04-15 02:24:53,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87528 states, 87527 states have (on average 3.0433923246541066) internal successors, (266379), 87527 states have internal predecessors, (266379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:54,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87528 states to 87528 states and 266379 transitions. [2021-04-15 02:24:54,178 INFO L78 Accepts]: Start accepts. Automaton has 87528 states and 266379 transitions. Word has length 22 [2021-04-15 02:24:54,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:54,178 INFO L480 AbstractCegarLoop]: Abstraction has 87528 states and 266379 transitions. [2021-04-15 02:24:54,178 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 02:24:54,178 INFO L276 IsEmpty]: Start isEmpty. Operand 87528 states and 266379 transitions. [2021-04-15 02:24:54,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:24:54,201 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:54,201 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:54,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10553 [2021-04-15 02:24:54,401 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:54,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:54,401 INFO L82 PathProgramCache]: Analyzing trace with hash -18701875, now seen corresponding path program 257 times [2021-04-15 02:24:54,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:54,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961143668] [2021-04-15 02:24:54,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:54,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961143668] [2021-04-15 02:24:54,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559488906] [2021-04-15 02:24:54,503 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 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 02:24:54,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:24:54,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:54,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:24:54,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:54,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:54,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:24:54,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777807755] [2021-04-15 02:24:54,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:24:54,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:54,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:24:54,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:24:54,588 INFO L87 Difference]: Start difference. First operand 87528 states and 266379 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 02:24:55,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:55,340 INFO L93 Difference]: Finished difference Result 89118 states and 270691 transitions. [2021-04-15 02:24:55,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 02:24:55,341 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 22 [2021-04-15 02:24:55,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:55,924 INFO L225 Difference]: With dead ends: 89118 [2021-04-15 02:24:55,925 INFO L226 Difference]: Without dead ends: 89118 [2021-04-15 02:24:55,925 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 432.6ms TimeCoverageRelationStatistics Valid=807, Invalid=1643, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 02:24:55,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89118 states. [2021-04-15 02:24:57,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89118 to 87510. [2021-04-15 02:24:57,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87510 states, 87509 states have (on average 3.043401250157127) internal successors, (266325), 87509 states have internal predecessors, (266325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:57,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87510 states to 87510 states and 266325 transitions. [2021-04-15 02:24:57,543 INFO L78 Accepts]: Start accepts. Automaton has 87510 states and 266325 transitions. Word has length 22 [2021-04-15 02:24:57,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:57,543 INFO L480 AbstractCegarLoop]: Abstraction has 87510 states and 266325 transitions. [2021-04-15 02:24:57,544 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 02:24:57,544 INFO L276 IsEmpty]: Start isEmpty. Operand 87510 states and 266325 transitions. [2021-04-15 02:24:57,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:24:57,566 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:57,566 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:57,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10554 [2021-04-15 02:24:57,766 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:57,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:57,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1303353945, now seen corresponding path program 258 times [2021-04-15 02:24:57,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:57,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81953192] [2021-04-15 02:24:57,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:57,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:57,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81953192] [2021-04-15 02:24:57,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431845596] [2021-04-15 02:24:57,876 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 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 02:24:57,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 02:24:57,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:57,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:24:57,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:57,943 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:57,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:57,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-04-15 02:24:57,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283750464] [2021-04-15 02:24:57,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:24:57,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:57,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:24:57,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:24:57,944 INFO L87 Difference]: Start difference. First operand 87510 states and 266325 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 02:24:58,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:58,489 INFO L93 Difference]: Finished difference Result 87690 states and 266541 transitions. [2021-04-15 02:24:58,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:24:58,490 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 22 [2021-04-15 02:24:58,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:58,650 INFO L225 Difference]: With dead ends: 87690 [2021-04-15 02:24:58,651 INFO L226 Difference]: Without dead ends: 87686 [2021-04-15 02:24:58,651 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 224.8ms TimeCoverageRelationStatistics Valid=313, Invalid=617, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:24:59,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87686 states. [2021-04-15 02:25:00,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87686 to 87508. [2021-04-15 02:25:00,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87508 states, 87507 states have (on average 3.0434250974207777) internal successors, (266321), 87507 states have internal predecessors, (266321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87508 states to 87508 states and 266321 transitions. [2021-04-15 02:25:00,626 INFO L78 Accepts]: Start accepts. Automaton has 87508 states and 266321 transitions. Word has length 22 [2021-04-15 02:25:00,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:00,626 INFO L480 AbstractCegarLoop]: Abstraction has 87508 states and 266321 transitions. [2021-04-15 02:25:00,626 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 02:25:00,626 INFO L276 IsEmpty]: Start isEmpty. Operand 87508 states and 266321 transitions. [2021-04-15 02:25:00,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:25:00,650 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:00,651 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:00,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10555,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:00,851 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:00,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:00,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1535013223, now seen corresponding path program 259 times [2021-04-15 02:25:00,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:00,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067743931] [2021-04-15 02:25:00,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:00,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:00,952 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:00,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067743931] [2021-04-15 02:25:00,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268683540] [2021-04-15 02:25:00,952 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 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 02:25:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:00,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:25:00,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:01,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:01,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-04-15 02:25:01,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118611241] [2021-04-15 02:25:01,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:25:01,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:01,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:25:01,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:25:01,047 INFO L87 Difference]: Start difference. First operand 87508 states and 266321 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 02:25:01,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:01,843 INFO L93 Difference]: Finished difference Result 97092 states and 294572 transitions. [2021-04-15 02:25:01,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 02:25:01,844 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 22 [2021-04-15 02:25:01,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:02,056 INFO L225 Difference]: With dead ends: 97092 [2021-04-15 02:25:02,056 INFO L226 Difference]: Without dead ends: 97092 [2021-04-15 02:25:02,057 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 431.5ms TimeCoverageRelationStatistics Valid=799, Invalid=1651, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 02:25:02,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97092 states. [2021-04-15 02:25:03,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97092 to 93336. [2021-04-15 02:25:04,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93336 states, 93335 states have (on average 3.0407457009696257) internal successors, (283808), 93335 states have internal predecessors, (283808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:04,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93336 states to 93336 states and 283808 transitions. [2021-04-15 02:25:04,330 INFO L78 Accepts]: Start accepts. Automaton has 93336 states and 283808 transitions. Word has length 22 [2021-04-15 02:25:04,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:04,330 INFO L480 AbstractCegarLoop]: Abstraction has 93336 states and 283808 transitions. [2021-04-15 02:25:04,330 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 02:25:04,330 INFO L276 IsEmpty]: Start isEmpty. Operand 93336 states and 283808 transitions. [2021-04-15 02:25:04,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:25:04,362 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:04,362 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:04,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10556 [2021-04-15 02:25:04,562 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:04,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:04,562 INFO L82 PathProgramCache]: Analyzing trace with hash -224277439, now seen corresponding path program 260 times [2021-04-15 02:25:04,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:04,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119601390] [2021-04-15 02:25:04,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:04,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:04,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119601390] [2021-04-15 02:25:04,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093254513] [2021-04-15 02:25:04,664 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 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 02:25:04,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:25:04,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:04,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:25:04,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:04,772 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:04,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:04,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-04-15 02:25:04,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328252731] [2021-04-15 02:25:04,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:25:04,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:04,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:25:04,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:25:04,774 INFO L87 Difference]: Start difference. First operand 93336 states and 283808 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 02:25:05,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:05,964 INFO L93 Difference]: Finished difference Result 97575 states and 296111 transitions. [2021-04-15 02:25:05,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 02:25:05,965 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 22 [2021-04-15 02:25:05,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:06,195 INFO L225 Difference]: With dead ends: 97575 [2021-04-15 02:25:06,195 INFO L226 Difference]: Without dead ends: 97575 [2021-04-15 02:25:06,195 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 433.7ms TimeCoverageRelationStatistics Valid=669, Invalid=1401, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 02:25:06,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97575 states. [2021-04-15 02:25:07,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97575 to 96000. [2021-04-15 02:25:07,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96000 states, 95999 states have (on average 3.0396149959895418) internal successors, (291800), 95999 states have internal predecessors, (291800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:08,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96000 states to 96000 states and 291800 transitions. [2021-04-15 02:25:08,039 INFO L78 Accepts]: Start accepts. Automaton has 96000 states and 291800 transitions. Word has length 22 [2021-04-15 02:25:08,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:08,039 INFO L480 AbstractCegarLoop]: Abstraction has 96000 states and 291800 transitions. [2021-04-15 02:25:08,039 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 02:25:08,039 INFO L276 IsEmpty]: Start isEmpty. Operand 96000 states and 291800 transitions. [2021-04-15 02:25:08,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:25:08,075 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:08,075 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:08,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10557,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:08,275 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:08,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:08,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1520086567, now seen corresponding path program 261 times [2021-04-15 02:25:08,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:08,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249165148] [2021-04-15 02:25:08,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:08,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:08,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249165148] [2021-04-15 02:25:08,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654097434] [2021-04-15 02:25:08,381 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 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 02:25:08,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:25:08,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:08,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:25:08,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:08,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:08,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-04-15 02:25:08,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042198737] [2021-04-15 02:25:08,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:25:08,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:08,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:25:08,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:25:08,475 INFO L87 Difference]: Start difference. First operand 96000 states and 291800 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 02:25:09,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:09,557 INFO L93 Difference]: Finished difference Result 98465 states and 298743 transitions. [2021-04-15 02:25:09,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 02:25:09,557 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 22 [2021-04-15 02:25:09,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:09,769 INFO L225 Difference]: With dead ends: 98465 [2021-04-15 02:25:09,769 INFO L226 Difference]: Without dead ends: 98465 [2021-04-15 02:25:09,769 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 413.8ms TimeCoverageRelationStatistics Valid=691, Invalid=1471, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 02:25:09,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98465 states. [2021-04-15 02:25:11,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98465 to 96553. [2021-04-15 02:25:11,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96553 states, 96552 states have (on average 3.0393881017482807) internal successors, (293459), 96552 states have internal predecessors, (293459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:12,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96553 states to 96553 states and 293459 transitions. [2021-04-15 02:25:12,191 INFO L78 Accepts]: Start accepts. Automaton has 96553 states and 293459 transitions. Word has length 22 [2021-04-15 02:25:12,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:12,191 INFO L480 AbstractCegarLoop]: Abstraction has 96553 states and 293459 transitions. [2021-04-15 02:25:12,191 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 02:25:12,191 INFO L276 IsEmpty]: Start isEmpty. Operand 96553 states and 293459 transitions. [2021-04-15 02:25:12,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:25:12,222 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:12,222 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:12,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10558,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:12,423 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:12,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:12,423 INFO L82 PathProgramCache]: Analyzing trace with hash -761242551, now seen corresponding path program 262 times [2021-04-15 02:25:12,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:12,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239964170] [2021-04-15 02:25:12,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:12,526 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:12,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239964170] [2021-04-15 02:25:12,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951743491] [2021-04-15 02:25:12,526 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 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 02:25:12,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:25:12,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:12,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:25:12,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:12,594 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:12,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:12,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-04-15 02:25:12,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097865415] [2021-04-15 02:25:12,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:25:12,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:12,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:25:12,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:25:12,595 INFO L87 Difference]: Start difference. First operand 96553 states and 293459 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:25:13,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:13,165 INFO L93 Difference]: Finished difference Result 96926 states and 294310 transitions. [2021-04-15 02:25:13,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:25:13,165 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 22 [2021-04-15 02:25:13,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:13,373 INFO L225 Difference]: With dead ends: 96926 [2021-04-15 02:25:13,373 INFO L226 Difference]: Without dead ends: 96924 [2021-04-15 02:25:13,374 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:25:13,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96924 states. [2021-04-15 02:25:15,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96924 to 96774. [2021-04-15 02:25:15,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96774 states, 96773 states have (on average 3.0395564878633503) internal successors, (294147), 96773 states have internal predecessors, (294147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:15,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96774 states to 96774 states and 294147 transitions. [2021-04-15 02:25:15,662 INFO L78 Accepts]: Start accepts. Automaton has 96774 states and 294147 transitions. Word has length 22 [2021-04-15 02:25:15,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:15,662 INFO L480 AbstractCegarLoop]: Abstraction has 96774 states and 294147 transitions. [2021-04-15 02:25:15,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:25:15,662 INFO L276 IsEmpty]: Start isEmpty. Operand 96774 states and 294147 transitions. [2021-04-15 02:25:15,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:25:15,696 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:15,696 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:15,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10559 [2021-04-15 02:25:15,896 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:15,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:15,897 INFO L82 PathProgramCache]: Analyzing trace with hash 956506509, now seen corresponding path program 263 times [2021-04-15 02:25:15,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:15,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813052615] [2021-04-15 02:25:15,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:16,005 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:16,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813052615] [2021-04-15 02:25:16,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188628374] [2021-04-15 02:25:16,005 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 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 02:25:16,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:25:16,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:16,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:25:16,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:25:16,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:16,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-04-15 02:25:16,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180619247] [2021-04-15 02:25:16,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:25:16,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:16,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:25:16,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:25:16,089 INFO L87 Difference]: Start difference. First operand 96774 states and 294147 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:25:16,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:16,633 INFO L93 Difference]: Finished difference Result 98650 states and 299438 transitions. [2021-04-15 02:25:16,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:25:16,634 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 22 [2021-04-15 02:25:16,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:16,843 INFO L225 Difference]: With dead ends: 98650 [2021-04-15 02:25:16,843 INFO L226 Difference]: Without dead ends: 98650 [2021-04-15 02:25:16,843 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 206.6ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:25:16,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98650 states. [2021-04-15 02:25:18,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98650 to 96776. [2021-04-15 02:25:18,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96776 states, 96775 states have (on average 3.0395556703694138) internal successors, (294153), 96775 states have internal predecessors, (294153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:19,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96776 states to 96776 states and 294153 transitions. [2021-04-15 02:25:19,247 INFO L78 Accepts]: Start accepts. Automaton has 96776 states and 294153 transitions. Word has length 22 [2021-04-15 02:25:19,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:19,247 INFO L480 AbstractCegarLoop]: Abstraction has 96776 states and 294153 transitions. [2021-04-15 02:25:19,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:25:19,247 INFO L276 IsEmpty]: Start isEmpty. Operand 96776 states and 294153 transitions. [2021-04-15 02:25:19,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:25:19,279 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:19,280 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:19,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10560,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:19,480 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:19,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:19,480 INFO L82 PathProgramCache]: Analyzing trace with hash -772540825, now seen corresponding path program 264 times [2021-04-15 02:25:19,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:19,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968856106] [2021-04-15 02:25:19,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:19,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968856106] [2021-04-15 02:25:19,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253259492] [2021-04-15 02:25:19,588 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 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 02:25:19,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:25:19,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:19,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:25:19,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:19,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:19,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-04-15 02:25:19,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123473559] [2021-04-15 02:25:19,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:25:19,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:19,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:25:19,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:25:19,674 INFO L87 Difference]: Start difference. First operand 96776 states and 294153 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 02:25:20,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:20,256 INFO L93 Difference]: Finished difference Result 100367 states and 304534 transitions. [2021-04-15 02:25:20,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:25:20,257 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 22 [2021-04-15 02:25:20,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:20,482 INFO L225 Difference]: With dead ends: 100367 [2021-04-15 02:25:20,482 INFO L226 Difference]: Without dead ends: 100367 [2021-04-15 02:25:20,482 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 252.8ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:25:20,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100367 states. [2021-04-15 02:25:22,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100367 to 96786. [2021-04-15 02:25:22,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96786 states, 96785 states have (on average 3.0395515834065194) internal successors, (294183), 96785 states have internal predecessors, (294183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:22,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96786 states to 96786 states and 294183 transitions. [2021-04-15 02:25:22,930 INFO L78 Accepts]: Start accepts. Automaton has 96786 states and 294183 transitions. Word has length 22 [2021-04-15 02:25:22,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:22,930 INFO L480 AbstractCegarLoop]: Abstraction has 96786 states and 294183 transitions. [2021-04-15 02:25:22,930 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 02:25:22,930 INFO L276 IsEmpty]: Start isEmpty. Operand 96786 states and 294183 transitions. [2021-04-15 02:25:22,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:25:22,961 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:22,961 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:23,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10561 [2021-04-15 02:25:23,162 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:23,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:23,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1461566669, now seen corresponding path program 265 times [2021-04-15 02:25:23,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:23,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139069020] [2021-04-15 02:25:23,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:23,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139069020] [2021-04-15 02:25:23,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385018023] [2021-04-15 02:25:23,261 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 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 02:25:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:23,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:25:23,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:23,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:23,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-04-15 02:25:23,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917606674] [2021-04-15 02:25:23,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:25:23,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:23,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:25:23,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:25:23,348 INFO L87 Difference]: Start difference. First operand 96786 states and 294183 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 02:25:23,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:23,995 INFO L93 Difference]: Finished difference Result 103852 states and 314875 transitions. [2021-04-15 02:25:23,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:25:23,996 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 22 [2021-04-15 02:25:23,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:24,972 INFO L225 Difference]: With dead ends: 103852 [2021-04-15 02:25:24,972 INFO L226 Difference]: Without dead ends: 103852 [2021-04-15 02:25:24,972 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 288.7ms TimeCoverageRelationStatistics Valid=443, Invalid=963, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 02:25:25,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103852 states. [2021-04-15 02:25:26,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103852 to 100467. [2021-04-15 02:25:26,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100467 states, 100466 states have (on average 3.0390181753030876) internal successors, (305318), 100466 states have internal predecessors, (305318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:26,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100467 states to 100467 states and 305318 transitions. [2021-04-15 02:25:26,995 INFO L78 Accepts]: Start accepts. Automaton has 100467 states and 305318 transitions. Word has length 22 [2021-04-15 02:25:26,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:26,995 INFO L480 AbstractCegarLoop]: Abstraction has 100467 states and 305318 transitions. [2021-04-15 02:25:26,995 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 02:25:26,995 INFO L276 IsEmpty]: Start isEmpty. Operand 100467 states and 305318 transitions. [2021-04-15 02:25:27,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:25:27,026 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:27,026 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:27,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10562 [2021-04-15 02:25:27,226 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:27,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:27,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1999422247, now seen corresponding path program 266 times [2021-04-15 02:25:27,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:27,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296140305] [2021-04-15 02:25:27,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:27,324 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:27,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296140305] [2021-04-15 02:25:27,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614633792] [2021-04-15 02:25:27,325 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 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 02:25:27,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:25:27,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:27,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:25:27,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:25:27,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:27,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-04-15 02:25:27,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731996678] [2021-04-15 02:25:27,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:25:27,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:27,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:25:27,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:25:27,413 INFO L87 Difference]: Start difference. First operand 100467 states and 305318 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 02:25:28,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:28,610 INFO L93 Difference]: Finished difference Result 117624 states and 356391 transitions. [2021-04-15 02:25:28,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 02:25:28,610 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 22 [2021-04-15 02:25:28,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:28,873 INFO L225 Difference]: With dead ends: 117624 [2021-04-15 02:25:28,873 INFO L226 Difference]: Without dead ends: 117624 [2021-04-15 02:25:28,873 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 332.6ms TimeCoverageRelationStatistics Valid=533, Invalid=1189, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:25:28,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117624 states. [2021-04-15 02:25:31,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117624 to 114603. [2021-04-15 02:25:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114603 states, 114602 states have (on average 3.0346416292909373) internal successors, (347776), 114602 states have internal predecessors, (347776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:31,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114603 states to 114603 states and 347776 transitions. [2021-04-15 02:25:31,555 INFO L78 Accepts]: Start accepts. Automaton has 114603 states and 347776 transitions. Word has length 22 [2021-04-15 02:25:31,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:31,555 INFO L480 AbstractCegarLoop]: Abstraction has 114603 states and 347776 transitions. [2021-04-15 02:25:31,555 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 02:25:31,555 INFO L276 IsEmpty]: Start isEmpty. Operand 114603 states and 347776 transitions. [2021-04-15 02:25:31,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:25:31,589 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:31,589 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:31,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10563 [2021-04-15 02:25:31,790 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:31,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:31,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1493075981, now seen corresponding path program 267 times [2021-04-15 02:25:31,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:31,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674183940] [2021-04-15 02:25:31,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:31,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674183940] [2021-04-15 02:25:31,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662207804] [2021-04-15 02:25:31,889 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 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 02:25:31,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:25:31,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:31,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:25:31,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:31,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:31,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-04-15 02:25:31,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51105983] [2021-04-15 02:25:31,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:25:31,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:31,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:25:31,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:25:31,988 INFO L87 Difference]: Start difference. First operand 114603 states and 347776 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 02:25:32,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:32,756 INFO L93 Difference]: Finished difference Result 117101 states and 354865 transitions. [2021-04-15 02:25:32,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:25:32,757 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 22 [2021-04-15 02:25:32,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:33,024 INFO L225 Difference]: With dead ends: 117101 [2021-04-15 02:25:33,024 INFO L226 Difference]: Without dead ends: 117101 [2021-04-15 02:25:33,024 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 348.9ms TimeCoverageRelationStatistics Valid=552, Invalid=1254, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 02:25:33,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117101 states. [2021-04-15 02:25:35,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117101 to 114723. [2021-04-15 02:25:35,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114723 states, 114722 states have (on average 3.034596677184847) internal successors, (348135), 114722 states have internal predecessors, (348135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:35,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114723 states to 114723 states and 348135 transitions. [2021-04-15 02:25:35,805 INFO L78 Accepts]: Start accepts. Automaton has 114723 states and 348135 transitions. Word has length 22 [2021-04-15 02:25:35,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:35,805 INFO L480 AbstractCegarLoop]: Abstraction has 114723 states and 348135 transitions. [2021-04-15 02:25:35,805 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 02:25:35,805 INFO L276 IsEmpty]: Start isEmpty. Operand 114723 states and 348135 transitions. [2021-04-15 02:25:35,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:25:35,837 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:35,837 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:36,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10564 [2021-04-15 02:25:36,038 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:36,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:36,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1318756377, now seen corresponding path program 268 times [2021-04-15 02:25:36,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:36,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754937616] [2021-04-15 02:25:36,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:36,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754937616] [2021-04-15 02:25:36,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450647015] [2021-04-15 02:25:36,139 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 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 02:25:36,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:25:36,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:36,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:25:36,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:36,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:36,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-04-15 02:25:36,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864104735] [2021-04-15 02:25:36,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:25:36,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:36,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:25:36,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:25:36,236 INFO L87 Difference]: Start difference. First operand 114723 states and 348135 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 02:25:37,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:37,399 INFO L93 Difference]: Finished difference Result 129613 states and 392477 transitions. [2021-04-15 02:25:37,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:25:37,403 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 22 [2021-04-15 02:25:37,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:37,697 INFO L225 Difference]: With dead ends: 129613 [2021-04-15 02:25:37,697 INFO L226 Difference]: Without dead ends: 129613 [2021-04-15 02:25:37,697 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 735.1ms TimeCoverageRelationStatistics Valid=441, Invalid=1041, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 02:25:37,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129613 states. [2021-04-15 02:25:40,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129613 to 128238. [2021-04-15 02:25:40,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128238 states, 128237 states have (on average 3.0310128901954974) internal successors, (388688), 128237 states have internal predecessors, (388688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:40,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128238 states to 128238 states and 388688 transitions. [2021-04-15 02:25:40,562 INFO L78 Accepts]: Start accepts. Automaton has 128238 states and 388688 transitions. Word has length 22 [2021-04-15 02:25:40,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:40,562 INFO L480 AbstractCegarLoop]: Abstraction has 128238 states and 388688 transitions. [2021-04-15 02:25:40,562 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 02:25:40,562 INFO L276 IsEmpty]: Start isEmpty. Operand 128238 states and 388688 transitions. [2021-04-15 02:25:40,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:25:40,595 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:40,595 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:40,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10565,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:40,795 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:40,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:40,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1708753741, now seen corresponding path program 269 times [2021-04-15 02:25:40,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:40,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950731449] [2021-04-15 02:25:40,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:40,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950731449] [2021-04-15 02:25:40,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278725083] [2021-04-15 02:25:40,896 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 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 02:25:40,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:25:40,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:40,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:25:40,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:25:40,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:40,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-04-15 02:25:40,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843140110] [2021-04-15 02:25:40,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:25:40,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:40,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:25:40,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:25:40,999 INFO L87 Difference]: Start difference. First operand 128238 states and 388688 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 02:25:42,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:42,168 INFO L93 Difference]: Finished difference Result 131498 states and 398224 transitions. [2021-04-15 02:25:42,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:25:42,169 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 22 [2021-04-15 02:25:42,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:42,454 INFO L225 Difference]: With dead ends: 131498 [2021-04-15 02:25:42,454 INFO L226 Difference]: Without dead ends: 131498 [2021-04-15 02:25:42,454 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 303.8ms TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 02:25:42,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131498 states. [2021-04-15 02:25:44,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131498 to 130639. [2021-04-15 02:25:44,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130639 states, 130638 states have (on average 3.0304429032900075) internal successors, (395891), 130638 states have internal predecessors, (395891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:45,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130639 states to 130639 states and 395891 transitions. [2021-04-15 02:25:45,211 INFO L78 Accepts]: Start accepts. Automaton has 130639 states and 395891 transitions. Word has length 22 [2021-04-15 02:25:45,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:45,211 INFO L480 AbstractCegarLoop]: Abstraction has 130639 states and 395891 transitions. [2021-04-15 02:25:45,212 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 02:25:45,212 INFO L276 IsEmpty]: Start isEmpty. Operand 130639 states and 395891 transitions. [2021-04-15 02:25:45,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:25:45,248 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:45,248 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:45,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10566 [2021-04-15 02:25:45,453 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:45,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:45,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1072286887, now seen corresponding path program 270 times [2021-04-15 02:25:45,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:45,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616974975] [2021-04-15 02:25:45,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:45,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616974975] [2021-04-15 02:25:45,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875894479] [2021-04-15 02:25:45,556 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 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 02:25:45,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:25:45,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:45,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:25:45,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:45,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:45,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-04-15 02:25:45,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444265610] [2021-04-15 02:25:45,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 02:25:45,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:45,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 02:25:45,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:25:45,660 INFO L87 Difference]: Start difference. First operand 130639 states and 395891 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 02:25:47,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:47,071 INFO L93 Difference]: Finished difference Result 132410 states and 400904 transitions. [2021-04-15 02:25:47,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:25:47,071 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 22 [2021-04-15 02:25:47,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:47,383 INFO L225 Difference]: With dead ends: 132410 [2021-04-15 02:25:47,383 INFO L226 Difference]: Without dead ends: 132410 [2021-04-15 02:25:47,383 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 364.2ms TimeCoverageRelationStatistics Valid=552, Invalid=1254, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 02:25:47,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132410 states. [2021-04-15 02:25:49,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132410 to 130698. [2021-04-15 02:25:49,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130698 states, 130697 states have (on average 3.030429160577519) internal successors, (396068), 130697 states have internal predecessors, (396068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:50,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130698 states to 130698 states and 396068 transitions. [2021-04-15 02:25:50,096 INFO L78 Accepts]: Start accepts. Automaton has 130698 states and 396068 transitions. Word has length 22 [2021-04-15 02:25:50,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:50,096 INFO L480 AbstractCegarLoop]: Abstraction has 130698 states and 396068 transitions. [2021-04-15 02:25:50,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 02:25:50,097 INFO L276 IsEmpty]: Start isEmpty. Operand 130698 states and 396068 transitions. [2021-04-15 02:25:50,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:25:50,130 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:50,130 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:50,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10567,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:25:50,339 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:50,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:50,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1478316403, now seen corresponding path program 271 times [2021-04-15 02:25:50,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:50,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632547880] [2021-04-15 02:25:50,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:50,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632547880] [2021-04-15 02:25:50,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543595279] [2021-04-15 02:25:50,450 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 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 02:25:50,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:50,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:25:50,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:50,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:50,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-04-15 02:25:50,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710600232] [2021-04-15 02:25:50,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 02:25:50,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:50,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 02:25:50,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:25:50,580 INFO L87 Difference]: Start difference. First operand 130698 states and 396068 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 02:25:51,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:51,989 INFO L93 Difference]: Finished difference Result 132757 states and 401917 transitions. [2021-04-15 02:25:51,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:25:51,990 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 22 [2021-04-15 02:25:51,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:52,310 INFO L225 Difference]: With dead ends: 132757 [2021-04-15 02:25:52,310 INFO L226 Difference]: Without dead ends: 132757 [2021-04-15 02:25:52,310 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 424.3ms TimeCoverageRelationStatistics Valid=507, Invalid=1215, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:25:52,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132757 states. [2021-04-15 02:25:54,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132757 to 131013. [2021-04-15 02:25:54,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131013 states, 131012 states have (on average 3.0303559979238543) internal successors, (397013), 131012 states have internal predecessors, (397013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:55,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131013 states to 131013 states and 397013 transitions. [2021-04-15 02:25:55,075 INFO L78 Accepts]: Start accepts. Automaton has 131013 states and 397013 transitions. Word has length 22 [2021-04-15 02:25:55,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:55,075 INFO L480 AbstractCegarLoop]: Abstraction has 131013 states and 397013 transitions. [2021-04-15 02:25:55,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 02:25:55,075 INFO L276 IsEmpty]: Start isEmpty. Operand 131013 states and 397013 transitions. [2021-04-15 02:25:55,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:25:55,110 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:25:55,110 INFO L551 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:25:55,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10568 [2021-04-15 02:25:55,311 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:25:55,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:25:55,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1057360231, now seen corresponding path program 272 times [2021-04-15 02:25:55,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:25:55,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592194599] [2021-04-15 02:25:55,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:25:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:25:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:55,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592194599] [2021-04-15 02:25:55,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80612043] [2021-04-15 02:25:55,426 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 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 02:25:55,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:25:55,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:25:55,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:25:55,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:25:55,561 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:25:55,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:25:55,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-04-15 02:25:55,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683042011] [2021-04-15 02:25:55,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 02:25:55,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:25:55,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 02:25:55,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:25:55,562 INFO L87 Difference]: Start difference. First operand 131013 states and 397013 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:56,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:25:56,975 INFO L93 Difference]: Finished difference Result 135540 states and 410128 transitions. [2021-04-15 02:25:56,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 02:25:56,976 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 02:25:56,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:25:57,304 INFO L225 Difference]: With dead ends: 135540 [2021-04-15 02:25:57,304 INFO L226 Difference]: Without dead ends: 135540 [2021-04-15 02:25:57,304 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 486.0ms TimeCoverageRelationStatistics Valid=851, Invalid=1905, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 02:25:57,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135540 states. [2021-04-15 02:25:59,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135540 to 131079. [2021-04-15 02:25:59,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131079 states, 131078 states have (on average 3.0303407131631546) internal successors, (397211), 131078 states have internal predecessors, (397211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:59,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131079 states to 131079 states and 397211 transitions. [2021-04-15 02:25:59,995 INFO L78 Accepts]: Start accepts. Automaton has 131079 states and 397211 transitions. Word has length 22 [2021-04-15 02:25:59,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:25:59,995 INFO L480 AbstractCegarLoop]: Abstraction has 131079 states and 397211 transitions. [2021-04-15 02:25:59,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:25:59,995 INFO L276 IsEmpty]: Start isEmpty. Operand 131079 states and 397211 transitions. [2021-04-15 02:26:00,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:26:00,040 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:00,040 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:00,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10569,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:00,241 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:00,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:00,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1384664402, now seen corresponding path program 273 times [2021-04-15 02:26:00,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:00,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187767429] [2021-04-15 02:26:00,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:00,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187767429] [2021-04-15 02:26:00,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697209201] [2021-04-15 02:26:00,370 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 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 02:26:00,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:26:00,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:00,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:26:00,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 66 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:00,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:00,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-04-15 02:26:00,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328105637] [2021-04-15 02:26:00,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:26:00,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:00,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:26:00,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:26:00,455 INFO L87 Difference]: Start difference. First operand 131079 states and 397211 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 02:26:01,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:01,752 INFO L93 Difference]: Finished difference Result 131316 states and 397574 transitions. [2021-04-15 02:26:01,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:26:01,753 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 24 [2021-04-15 02:26:01,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:02,040 INFO L225 Difference]: With dead ends: 131316 [2021-04-15 02:26:02,040 INFO L226 Difference]: Without dead ends: 131310 [2021-04-15 02:26:02,040 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 225.7ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:26:02,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131310 states. [2021-04-15 02:26:04,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131310 to 131104. [2021-04-15 02:26:04,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131104 states, 131103 states have (on average 3.0301594929177824) internal successors, (397263), 131103 states have internal predecessors, (397263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:04,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131104 states to 131104 states and 397263 transitions. [2021-04-15 02:26:04,686 INFO L78 Accepts]: Start accepts. Automaton has 131104 states and 397263 transitions. Word has length 24 [2021-04-15 02:26:04,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:04,686 INFO L480 AbstractCegarLoop]: Abstraction has 131104 states and 397263 transitions. [2021-04-15 02:26:04,686 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 02:26:04,686 INFO L276 IsEmpty]: Start isEmpty. Operand 131104 states and 397263 transitions. [2021-04-15 02:26:04,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:26:04,731 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:04,731 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:04,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10570,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:04,931 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:04,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:04,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1036551628, now seen corresponding path program 274 times [2021-04-15 02:26:04,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:04,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707089740] [2021-04-15 02:26:04,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:05,025 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 57 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:05,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707089740] [2021-04-15 02:26:05,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242292453] [2021-04-15 02:26:05,025 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 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 02:26:05,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:26:05,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:05,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:26:05,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:05,139 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 77 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:05,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:05,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 19 [2021-04-15 02:26:05,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802308323] [2021-04-15 02:26:05,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 02:26:05,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:05,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 02:26:05,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:26:05,139 INFO L87 Difference]: Start difference. First operand 131104 states and 397263 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 02:26:06,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:06,359 INFO L93 Difference]: Finished difference Result 131229 states and 397402 transitions. [2021-04-15 02:26:06,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:26:06,360 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 24 [2021-04-15 02:26:06,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:06,659 INFO L225 Difference]: With dead ends: 131229 [2021-04-15 02:26:06,659 INFO L226 Difference]: Without dead ends: 131229 [2021-04-15 02:26:06,660 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 212.1ms TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:26:06,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131229 states. [2021-04-15 02:26:08,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131229 to 131082. [2021-04-15 02:26:08,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131082 states, 131081 states have (on average 3.0302637300600392) internal successors, (397210), 131081 states have internal predecessors, (397210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:09,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131082 states to 131082 states and 397210 transitions. [2021-04-15 02:26:09,213 INFO L78 Accepts]: Start accepts. Automaton has 131082 states and 397210 transitions. Word has length 24 [2021-04-15 02:26:09,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:09,213 INFO L480 AbstractCegarLoop]: Abstraction has 131082 states and 397210 transitions. [2021-04-15 02:26:09,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 02:26:09,213 INFO L276 IsEmpty]: Start isEmpty. Operand 131082 states and 397210 transitions. [2021-04-15 02:26:09,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:26:09,255 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:09,256 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:09,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10571,276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:09,456 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:09,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:09,456 INFO L82 PathProgramCache]: Analyzing trace with hash -757952152, now seen corresponding path program 275 times [2021-04-15 02:26:09,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:09,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358698032] [2021-04-15 02:26:09,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:09,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358698032] [2021-04-15 02:26:09,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17501621] [2021-04-15 02:26:09,546 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 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 02:26:09,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:26:09,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:09,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:26:09,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 75 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:26:09,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:09,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 19 [2021-04-15 02:26:09,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764524151] [2021-04-15 02:26:09,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 02:26:09,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:09,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 02:26:09,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:26:09,680 INFO L87 Difference]: Start difference. First operand 131082 states and 397210 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 02:26:10,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:10,324 INFO L93 Difference]: Finished difference Result 131237 states and 397440 transitions. [2021-04-15 02:26:10,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:26:10,325 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 24 [2021-04-15 02:26:10,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:10,597 INFO L225 Difference]: With dead ends: 131237 [2021-04-15 02:26:10,597 INFO L226 Difference]: Without dead ends: 131237 [2021-04-15 02:26:10,597 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 208.8ms TimeCoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:26:11,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131237 states. [2021-04-15 02:26:13,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131237 to 131093. [2021-04-15 02:26:13,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131093 states, 131092 states have (on average 3.0302077930003355) internal successors, (397236), 131092 states have internal predecessors, (397236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:13,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131093 states to 131093 states and 397236 transitions. [2021-04-15 02:26:13,898 INFO L78 Accepts]: Start accepts. Automaton has 131093 states and 397236 transitions. Word has length 24 [2021-04-15 02:26:13,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:13,898 INFO L480 AbstractCegarLoop]: Abstraction has 131093 states and 397236 transitions. [2021-04-15 02:26:13,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 02:26:13,898 INFO L276 IsEmpty]: Start isEmpty. Operand 131093 states and 397236 transitions. [2021-04-15 02:26:13,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:26:13,944 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:13,944 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:14,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10572 [2021-04-15 02:26:14,145 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:14,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:14,145 INFO L82 PathProgramCache]: Analyzing trace with hash -711302988, now seen corresponding path program 276 times [2021-04-15 02:26:14,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:14,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857123264] [2021-04-15 02:26:14,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:14,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857123264] [2021-04-15 02:26:14,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729735612] [2021-04-15 02:26:14,239 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 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 02:26:14,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:26:14,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:14,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:26:14,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:14,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:14,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:26:14,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065354150] [2021-04-15 02:26:14,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:26:14,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:14,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:26:14,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:26:14,324 INFO L87 Difference]: Start difference. First operand 131093 states and 397236 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 02:26:14,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:14,955 INFO L93 Difference]: Finished difference Result 131154 states and 397359 transitions. [2021-04-15 02:26:14,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:26:14,956 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 24 [2021-04-15 02:26:14,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:15,228 INFO L225 Difference]: With dead ends: 131154 [2021-04-15 02:26:15,229 INFO L226 Difference]: Without dead ends: 131153 [2021-04-15 02:26:15,229 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 149.2ms TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:26:15,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131153 states. [2021-04-15 02:26:17,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131153 to 131093. [2021-04-15 02:26:17,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131093 states, 131092 states have (on average 3.030184908308669) internal successors, (397233), 131092 states have internal predecessors, (397233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:18,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131093 states to 131093 states and 397233 transitions. [2021-04-15 02:26:18,604 INFO L78 Accepts]: Start accepts. Automaton has 131093 states and 397233 transitions. Word has length 24 [2021-04-15 02:26:18,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:18,604 INFO L480 AbstractCegarLoop]: Abstraction has 131093 states and 397233 transitions. [2021-04-15 02:26:18,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 02:26:18,604 INFO L276 IsEmpty]: Start isEmpty. Operand 131093 states and 397233 transitions. [2021-04-15 02:26:18,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:26:18,648 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:18,648 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:18,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10573 [2021-04-15 02:26:18,848 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:18,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:18,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1157400778, now seen corresponding path program 277 times [2021-04-15 02:26:18,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:18,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38947857] [2021-04-15 02:26:18,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:26:18,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38947857] [2021-04-15 02:26:18,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368809042] [2021-04-15 02:26:18,918 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 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 02:26:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:18,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:26:18,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:18,995 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:26:18,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:18,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:26:18,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924743657] [2021-04-15 02:26:18,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:26:18,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:18,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:26:18,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:26:18,996 INFO L87 Difference]: Start difference. First operand 131093 states and 397233 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 02:26:19,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:19,564 INFO L93 Difference]: Finished difference Result 131454 states and 397901 transitions. [2021-04-15 02:26:19,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:26:19,564 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 24 [2021-04-15 02:26:19,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:19,833 INFO L225 Difference]: With dead ends: 131454 [2021-04-15 02:26:19,833 INFO L226 Difference]: Without dead ends: 131452 [2021-04-15 02:26:19,834 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:26:19,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131452 states. [2021-04-15 02:26:22,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131452 to 131181. [2021-04-15 02:26:22,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131181 states, 131180 states have (on average 3.0299893276414087) internal successors, (397474), 131180 states have internal predecessors, (397474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:22,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131181 states to 131181 states and 397474 transitions. [2021-04-15 02:26:22,950 INFO L78 Accepts]: Start accepts. Automaton has 131181 states and 397474 transitions. Word has length 24 [2021-04-15 02:26:22,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:22,950 INFO L480 AbstractCegarLoop]: Abstraction has 131181 states and 397474 transitions. [2021-04-15 02:26:22,950 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 02:26:22,950 INFO L276 IsEmpty]: Start isEmpty. Operand 131181 states and 397474 transitions. [2021-04-15 02:26:22,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:26:22,996 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:22,996 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:23,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10574 [2021-04-15 02:26:23,196 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:23,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:23,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1392111828, now seen corresponding path program 278 times [2021-04-15 02:26:23,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:23,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967106622] [2021-04-15 02:26:23,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:23,719 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:26:23,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967106622] [2021-04-15 02:26:23,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317671726] [2021-04-15 02:26:23,719 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 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 02:26:23,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:26:23,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:23,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:26:23,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:26:23,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:23,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-04-15 02:26:23,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459480988] [2021-04-15 02:26:23,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:26:23,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:23,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:26:23,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:26:23,892 INFO L87 Difference]: Start difference. First operand 131181 states and 397474 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 02:26:24,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:24,514 INFO L93 Difference]: Finished difference Result 131473 states and 397928 transitions. [2021-04-15 02:26:24,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:26:24,514 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 24 [2021-04-15 02:26:24,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:24,799 INFO L225 Difference]: With dead ends: 131473 [2021-04-15 02:26:24,799 INFO L226 Difference]: Without dead ends: 131464 [2021-04-15 02:26:24,800 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 593.1ms TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:26:24,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131464 states. [2021-04-15 02:26:27,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131464 to 131129. [2021-04-15 02:26:27,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131129 states, 131128 states have (on average 3.030046976999573) internal successors, (397324), 131128 states have internal predecessors, (397324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:27,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131129 states to 131129 states and 397324 transitions. [2021-04-15 02:26:27,688 INFO L78 Accepts]: Start accepts. Automaton has 131129 states and 397324 transitions. Word has length 24 [2021-04-15 02:26:27,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:27,688 INFO L480 AbstractCegarLoop]: Abstraction has 131129 states and 397324 transitions. [2021-04-15 02:26:27,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 02:26:27,688 INFO L276 IsEmpty]: Start isEmpty. Operand 131129 states and 397324 transitions. [2021-04-15 02:26:27,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:26:27,734 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:27,734 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:27,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10575 [2021-04-15 02:26:27,934 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:27,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:27,935 INFO L82 PathProgramCache]: Analyzing trace with hash 318501480, now seen corresponding path program 279 times [2021-04-15 02:26:27,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:27,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885552632] [2021-04-15 02:26:27,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:28,014 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:28,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885552632] [2021-04-15 02:26:28,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119642359] [2021-04-15 02:26:28,014 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 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 02:26:28,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:26:28,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:28,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:26:28,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:28,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:28,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:26:28,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038508702] [2021-04-15 02:26:28,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:26:28,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:28,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:26:28,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:26:28,085 INFO L87 Difference]: Start difference. First operand 131129 states and 397324 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 02:26:29,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:29,192 INFO L93 Difference]: Finished difference Result 131345 states and 397633 transitions. [2021-04-15 02:26:29,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:26:29,193 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 24 [2021-04-15 02:26:29,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:29,449 INFO L225 Difference]: With dead ends: 131345 [2021-04-15 02:26:29,449 INFO L226 Difference]: Without dead ends: 131343 [2021-04-15 02:26:29,449 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:26:29,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131343 states. [2021-04-15 02:26:31,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131343 to 131121. [2021-04-15 02:26:31,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131121 states, 131120 states have (on average 3.0300030506406346) internal successors, (397294), 131120 states have internal predecessors, (397294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:32,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131121 states to 131121 states and 397294 transitions. [2021-04-15 02:26:32,246 INFO L78 Accepts]: Start accepts. Automaton has 131121 states and 397294 transitions. Word has length 24 [2021-04-15 02:26:32,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:32,247 INFO L480 AbstractCegarLoop]: Abstraction has 131121 states and 397294 transitions. [2021-04-15 02:26:32,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 02:26:32,247 INFO L276 IsEmpty]: Start isEmpty. Operand 131121 states and 397294 transitions. [2021-04-15 02:26:32,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:26:32,291 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:32,291 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:32,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10576 [2021-04-15 02:26:32,491 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:32,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:32,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1807906476, now seen corresponding path program 280 times [2021-04-15 02:26:32,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:32,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724360503] [2021-04-15 02:26:32,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:32,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:32,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724360503] [2021-04-15 02:26:32,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784925007] [2021-04-15 02:26:32,581 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 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 02:26:32,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:26:32,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:32,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:26:32,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:32,645 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 58 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:26:32,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:32,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-04-15 02:26:32,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605775892] [2021-04-15 02:26:32,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:26:32,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:32,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:26:32,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:26:32,646 INFO L87 Difference]: Start difference. First operand 131121 states and 397294 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 02:26:34,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:34,073 INFO L93 Difference]: Finished difference Result 131339 states and 397604 transitions. [2021-04-15 02:26:34,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:26:34,086 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 24 [2021-04-15 02:26:34,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:34,489 INFO L225 Difference]: With dead ends: 131339 [2021-04-15 02:26:34,489 INFO L226 Difference]: Without dead ends: 131336 [2021-04-15 02:26:34,489 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 193.4ms TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:26:34,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131336 states. [2021-04-15 02:26:37,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131336 to 131113. [2021-04-15 02:26:37,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131113 states, 131112 states have (on average 3.0299667459881627) internal successors, (397265), 131112 states have internal predecessors, (397265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:37,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131113 states to 131113 states and 397265 transitions. [2021-04-15 02:26:37,814 INFO L78 Accepts]: Start accepts. Automaton has 131113 states and 397265 transitions. Word has length 24 [2021-04-15 02:26:37,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:37,814 INFO L480 AbstractCegarLoop]: Abstraction has 131113 states and 397265 transitions. [2021-04-15 02:26:37,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 02:26:37,814 INFO L276 IsEmpty]: Start isEmpty. Operand 131113 states and 397265 transitions. [2021-04-15 02:26:37,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:26:37,860 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:37,860 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:38,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10577,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:38,061 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:38,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:38,062 INFO L82 PathProgramCache]: Analyzing trace with hash 734821096, now seen corresponding path program 281 times [2021-04-15 02:26:38,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:38,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846569546] [2021-04-15 02:26:38,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:38,167 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 39 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:38,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846569546] [2021-04-15 02:26:38,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101548604] [2021-04-15 02:26:38,167 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 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 02:26:38,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 02:26:38,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:38,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:26:38,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:26:38,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:38,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-04-15 02:26:38,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061095897] [2021-04-15 02:26:38,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:26:38,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:38,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:26:38,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:26:38,241 INFO L87 Difference]: Start difference. First operand 131113 states and 397265 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:26:39,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:39,505 INFO L93 Difference]: Finished difference Result 131264 states and 397507 transitions. [2021-04-15 02:26:39,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:26:39,525 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 24 [2021-04-15 02:26:39,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:39,818 INFO L225 Difference]: With dead ends: 131264 [2021-04-15 02:26:39,818 INFO L226 Difference]: Without dead ends: 131259 [2021-04-15 02:26:39,818 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=332, Invalid=724, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:26:39,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131259 states. [2021-04-15 02:26:41,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131259 to 131113. [2021-04-15 02:26:42,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131113 states, 131112 states have (on average 3.029920983586552) internal successors, (397259), 131112 states have internal predecessors, (397259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:42,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131113 states to 131113 states and 397259 transitions. [2021-04-15 02:26:42,358 INFO L78 Accepts]: Start accepts. Automaton has 131113 states and 397259 transitions. Word has length 24 [2021-04-15 02:26:42,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:42,358 INFO L480 AbstractCegarLoop]: Abstraction has 131113 states and 397259 transitions. [2021-04-15 02:26:42,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:26:42,358 INFO L276 IsEmpty]: Start isEmpty. Operand 131113 states and 397259 transitions. [2021-04-15 02:26:42,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:26:42,403 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:42,403 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:42,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10578 [2021-04-15 02:26:42,604 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:42,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:42,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1943482834, now seen corresponding path program 282 times [2021-04-15 02:26:42,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:42,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809258807] [2021-04-15 02:26:42,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:26:42,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809258807] [2021-04-15 02:26:42,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538969463] [2021-04-15 02:26:42,671 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 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 02:26:42,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 02:26:42,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:42,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:26:42,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:26:42,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:42,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:26:42,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650754394] [2021-04-15 02:26:42,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:26:42,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:42,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:26:42,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:26:42,748 INFO L87 Difference]: Start difference. First operand 131113 states and 397259 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 02:26:43,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:43,311 INFO L93 Difference]: Finished difference Result 131472 states and 397913 transitions. [2021-04-15 02:26:43,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:26:43,312 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 24 [2021-04-15 02:26:43,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:43,584 INFO L225 Difference]: With dead ends: 131472 [2021-04-15 02:26:43,584 INFO L226 Difference]: Without dead ends: 131470 [2021-04-15 02:26:43,585 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:26:44,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131470 states. [2021-04-15 02:26:46,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131470 to 131189. [2021-04-15 02:26:46,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131189 states, 131188 states have (on average 3.0296902155684973) internal successors, (397459), 131188 states have internal predecessors, (397459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:46,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131189 states to 131189 states and 397459 transitions. [2021-04-15 02:26:46,822 INFO L78 Accepts]: Start accepts. Automaton has 131189 states and 397459 transitions. Word has length 24 [2021-04-15 02:26:46,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:46,822 INFO L480 AbstractCegarLoop]: Abstraction has 131189 states and 397459 transitions. [2021-04-15 02:26:46,822 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 02:26:46,823 INFO L276 IsEmpty]: Start isEmpty. Operand 131189 states and 397459 transitions. [2021-04-15 02:26:46,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:26:46,863 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:46,863 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:47,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10579,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:47,063 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:47,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:47,064 INFO L82 PathProgramCache]: Analyzing trace with hash -606029772, now seen corresponding path program 283 times [2021-04-15 02:26:47,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:47,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143263] [2021-04-15 02:26:47,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:47,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:47,131 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:47,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143263] [2021-04-15 02:26:47,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524912141] [2021-04-15 02:26:47,131 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 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 02:26:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:47,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:26:47,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:47,207 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:26:47,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:47,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-04-15 02:26:47,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693463386] [2021-04-15 02:26:47,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:26:47,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:47,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:26:47,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:26:47,208 INFO L87 Difference]: Start difference. First operand 131189 states and 397459 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 02:26:47,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:47,777 INFO L93 Difference]: Finished difference Result 131509 states and 397970 transitions. [2021-04-15 02:26:47,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:26:47,777 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 24 [2021-04-15 02:26:47,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:48,034 INFO L225 Difference]: With dead ends: 131509 [2021-04-15 02:26:48,034 INFO L226 Difference]: Without dead ends: 131502 [2021-04-15 02:26:48,034 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:26:48,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131502 states. [2021-04-15 02:26:50,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131502 to 131146. [2021-04-15 02:26:50,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131146 states, 131145 states have (on average 3.029646574402379) internal successors, (397323), 131145 states have internal predecessors, (397323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:51,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131146 states to 131146 states and 397323 transitions. [2021-04-15 02:26:51,291 INFO L78 Accepts]: Start accepts. Automaton has 131146 states and 397323 transitions. Word has length 24 [2021-04-15 02:26:51,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:51,291 INFO L480 AbstractCegarLoop]: Abstraction has 131146 states and 397323 transitions. [2021-04-15 02:26:51,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 02:26:51,291 INFO L276 IsEmpty]: Start isEmpty. Operand 131146 states and 397323 transitions. [2021-04-15 02:26:51,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:26:51,360 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:51,360 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:51,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10580,285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:51,564 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:51,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:51,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1104583536, now seen corresponding path program 284 times [2021-04-15 02:26:51,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:51,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959395180] [2021-04-15 02:26:51,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:51,638 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:51,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959395180] [2021-04-15 02:26:51,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324725912] [2021-04-15 02:26:51,639 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 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 02:26:51,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:26:51,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:51,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:26:51,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:26:51,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:51,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2021-04-15 02:26:51,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694860971] [2021-04-15 02:26:51,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:26:51,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:51,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:26:51,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:26:51,719 INFO L87 Difference]: Start difference. First operand 131146 states and 397323 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 02:26:52,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:52,374 INFO L93 Difference]: Finished difference Result 131510 states and 397931 transitions. [2021-04-15 02:26:52,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:26:52,374 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 24 [2021-04-15 02:26:52,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:52,637 INFO L225 Difference]: With dead ends: 131510 [2021-04-15 02:26:52,637 INFO L226 Difference]: Without dead ends: 131508 [2021-04-15 02:26:52,637 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 161.0ms TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:26:52,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131508 states. [2021-04-15 02:26:54,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131508 to 131130. [2021-04-15 02:26:55,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131130 states, 131129 states have (on average 3.029581557092634) internal successors, (397266), 131129 states have internal predecessors, (397266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:55,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131130 states to 131130 states and 397266 transitions. [2021-04-15 02:26:55,446 INFO L78 Accepts]: Start accepts. Automaton has 131130 states and 397266 transitions. Word has length 24 [2021-04-15 02:26:55,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:55,446 INFO L480 AbstractCegarLoop]: Abstraction has 131130 states and 397266 transitions. [2021-04-15 02:26:55,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 02:26:55,446 INFO L276 IsEmpty]: Start isEmpty. Operand 131130 states and 397266 transitions. [2021-04-15 02:26:55,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:26:55,487 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:55,487 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:55,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10581,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:55,688 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:55,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:55,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1700978764, now seen corresponding path program 285 times [2021-04-15 02:26:55,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:55,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032172909] [2021-04-15 02:26:55,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:55,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032172909] [2021-04-15 02:26:55,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023251018] [2021-04-15 02:26:55,769 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 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 02:26:55,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-04-15 02:26:55,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:55,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:26:55,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:55,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:55,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:26:55,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153350478] [2021-04-15 02:26:55,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:26:55,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:55,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:26:55,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:26:55,840 INFO L87 Difference]: Start difference. First operand 131130 states and 397266 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 02:26:56,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:56,972 INFO L93 Difference]: Finished difference Result 131365 states and 397609 transitions. [2021-04-15 02:26:56,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:26:56,973 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 24 [2021-04-15 02:26:56,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:57,233 INFO L225 Difference]: With dead ends: 131365 [2021-04-15 02:26:57,233 INFO L226 Difference]: Without dead ends: 131362 [2021-04-15 02:26:57,233 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 191.5ms TimeCoverageRelationStatistics Valid=279, Invalid=591, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:26:57,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131362 states. [2021-04-15 02:26:59,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131362 to 131116. [2021-04-15 02:26:59,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 131115 states have (on average 3.029531327460626) internal successors, (397217), 131115 states have internal predecessors, (397217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:59,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 397217 transitions. [2021-04-15 02:26:59,949 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 397217 transitions. Word has length 24 [2021-04-15 02:26:59,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:59,949 INFO L480 AbstractCegarLoop]: Abstraction has 131116 states and 397217 transitions. [2021-04-15 02:26:59,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 02:26:59,949 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 397217 transitions. [2021-04-15 02:26:59,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:26:59,992 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:59,992 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:00,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10582,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:00,193 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:00,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:00,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1520903152, now seen corresponding path program 286 times [2021-04-15 02:27:00,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:00,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794947328] [2021-04-15 02:27:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:00,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794947328] [2021-04-15 02:27:00,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854645271] [2021-04-15 02:27:00,278 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 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 02:27:00,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:27:00,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:00,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:27:00,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:00,349 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:27:00,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:00,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-04-15 02:27:00,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950774853] [2021-04-15 02:27:00,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:27:00,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:00,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:27:00,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:27:00,349 INFO L87 Difference]: Start difference. First operand 131116 states and 397217 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:27:01,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:01,583 INFO L93 Difference]: Finished difference Result 131356 states and 397566 transitions. [2021-04-15 02:27:01,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:27:01,584 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 24 [2021-04-15 02:27:01,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:01,851 INFO L225 Difference]: With dead ends: 131356 [2021-04-15 02:27:01,851 INFO L226 Difference]: Without dead ends: 131351 [2021-04-15 02:27:01,851 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 192.0ms TimeCoverageRelationStatistics Valid=316, Invalid=676, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:27:01,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131351 states. [2021-04-15 02:27:04,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131351 to 131116. [2021-04-15 02:27:04,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 131115 states have (on average 3.0294016702894404) internal successors, (397200), 131115 states have internal predecessors, (397200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:04,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 397200 transitions. [2021-04-15 02:27:04,569 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 397200 transitions. Word has length 24 [2021-04-15 02:27:04,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:04,570 INFO L480 AbstractCegarLoop]: Abstraction has 131116 states and 397200 transitions. [2021-04-15 02:27:04,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:27:04,570 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 397200 transitions. [2021-04-15 02:27:04,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:27:04,615 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:04,615 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:04,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10583 [2021-04-15 02:27:04,815 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:04,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:04,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1679972556, now seen corresponding path program 287 times [2021-04-15 02:27:04,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:04,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593448304] [2021-04-15 02:27:04,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:04,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593448304] [2021-04-15 02:27:04,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458198967] [2021-04-15 02:27:04,924 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 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 02:27:04,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-04-15 02:27:04,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:04,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:27:04,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:27:04,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:04,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-04-15 02:27:04,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998698306] [2021-04-15 02:27:04,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:27:04,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:04,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:27:04,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:27:04,999 INFO L87 Difference]: Start difference. First operand 131116 states and 397200 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:27:06,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:06,176 INFO L93 Difference]: Finished difference Result 131372 states and 397726 transitions. [2021-04-15 02:27:06,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:27:06,193 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 24 [2021-04-15 02:27:06,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:06,462 INFO L225 Difference]: With dead ends: 131372 [2021-04-15 02:27:06,462 INFO L226 Difference]: Without dead ends: 131369 [2021-04-15 02:27:06,462 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 174.0ms TimeCoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:27:06,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131369 states. [2021-04-15 02:27:08,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131369 to 131116. [2021-04-15 02:27:08,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 131115 states have (on average 3.0293787896121724) internal successors, (397197), 131115 states have internal predecessors, (397197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:08,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 397197 transitions. [2021-04-15 02:27:08,952 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 397197 transitions. Word has length 24 [2021-04-15 02:27:08,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:08,952 INFO L480 AbstractCegarLoop]: Abstraction has 131116 states and 397197 transitions. [2021-04-15 02:27:08,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:27:08,952 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 397197 transitions. [2021-04-15 02:27:08,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:27:08,995 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:08,996 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:09,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10584,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:09,196 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:09,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:09,196 INFO L82 PathProgramCache]: Analyzing trace with hash 542222794, now seen corresponding path program 288 times [2021-04-15 02:27:09,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:09,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441345954] [2021-04-15 02:27:09,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:27:09,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441345954] [2021-04-15 02:27:09,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540588506] [2021-04-15 02:27:09,293 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 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 02:27:09,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 02:27:09,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:09,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:27:09,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:27:09,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:09,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:27:09,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589567054] [2021-04-15 02:27:09,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:27:09,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:09,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:27:09,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:27:09,374 INFO L87 Difference]: Start difference. First operand 131116 states and 397197 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 02:27:09,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:09,900 INFO L93 Difference]: Finished difference Result 131414 states and 397691 transitions. [2021-04-15 02:27:09,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:27:09,900 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 24 [2021-04-15 02:27:09,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:10,153 INFO L225 Difference]: With dead ends: 131414 [2021-04-15 02:27:10,153 INFO L226 Difference]: Without dead ends: 131412 [2021-04-15 02:27:10,153 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:27:10,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131412 states. [2021-04-15 02:27:12,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131412 to 131150. [2021-04-15 02:27:12,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131150 states, 131149 states have (on average 3.029096676299476) internal successors, (397263), 131149 states have internal predecessors, (397263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:13,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131150 states to 131150 states and 397263 transitions. [2021-04-15 02:27:13,357 INFO L78 Accepts]: Start accepts. Automaton has 131150 states and 397263 transitions. Word has length 24 [2021-04-15 02:27:13,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:13,357 INFO L480 AbstractCegarLoop]: Abstraction has 131150 states and 397263 transitions. [2021-04-15 02:27:13,357 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 02:27:13,357 INFO L276 IsEmpty]: Start isEmpty. Operand 131150 states and 397263 transitions. [2021-04-15 02:27:13,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:27:13,404 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:13,404 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:13,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10585 [2021-04-15 02:27:13,605 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:13,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:13,605 INFO L82 PathProgramCache]: Analyzing trace with hash -2007289812, now seen corresponding path program 289 times [2021-04-15 02:27:13,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:13,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671450205] [2021-04-15 02:27:13,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:13,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:13,671 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:13,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671450205] [2021-04-15 02:27:13,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651330601] [2021-04-15 02:27:13,671 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 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 02:27:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:13,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:27:13,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:27:13,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:13,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-04-15 02:27:13,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736155073] [2021-04-15 02:27:13,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:27:13,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:13,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:27:13,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:27:13,745 INFO L87 Difference]: Start difference. First operand 131150 states and 397263 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 02:27:14,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:14,303 INFO L93 Difference]: Finished difference Result 131457 states and 397741 transitions. [2021-04-15 02:27:14,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:27:14,304 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 24 [2021-04-15 02:27:14,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:14,568 INFO L225 Difference]: With dead ends: 131457 [2021-04-15 02:27:14,568 INFO L226 Difference]: Without dead ends: 131452 [2021-04-15 02:27:14,568 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:27:14,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131452 states. [2021-04-15 02:27:16,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131452 to 131114. [2021-04-15 02:27:17,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131114 states, 131113 states have (on average 3.028967379283519) internal successors, (397137), 131113 states have internal predecessors, (397137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:17,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131114 states to 131114 states and 397137 transitions. [2021-04-15 02:27:17,856 INFO L78 Accepts]: Start accepts. Automaton has 131114 states and 397137 transitions. Word has length 24 [2021-04-15 02:27:17,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:17,857 INFO L480 AbstractCegarLoop]: Abstraction has 131114 states and 397137 transitions. [2021-04-15 02:27:17,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 02:27:17,857 INFO L276 IsEmpty]: Start isEmpty. Operand 131114 states and 397137 transitions. [2021-04-15 02:27:17,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:27:17,907 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:17,907 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:18,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10586 [2021-04-15 02:27:18,113 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:18,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:18,113 INFO L82 PathProgramCache]: Analyzing trace with hash -296676504, now seen corresponding path program 290 times [2021-04-15 02:27:18,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:18,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157047917] [2021-04-15 02:27:18,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:18,186 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:18,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157047917] [2021-04-15 02:27:18,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750354412] [2021-04-15 02:27:18,186 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 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 02:27:18,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:27:18,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:18,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:27:18,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:27:18,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:18,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2021-04-15 02:27:18,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963097504] [2021-04-15 02:27:18,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:27:18,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:18,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:27:18,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:27:18,259 INFO L87 Difference]: Start difference. First operand 131114 states and 397137 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 02:27:18,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:18,822 INFO L93 Difference]: Finished difference Result 131477 states and 397730 transitions. [2021-04-15 02:27:18,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:27:18,823 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 24 [2021-04-15 02:27:18,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:19,071 INFO L225 Difference]: With dead ends: 131477 [2021-04-15 02:27:19,072 INFO L226 Difference]: Without dead ends: 131475 [2021-04-15 02:27:19,072 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:27:19,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131475 states. [2021-04-15 02:27:21,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131475 to 131109. [2021-04-15 02:27:21,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131109 states, 131108 states have (on average 3.0287701742075237) internal successors, (397096), 131108 states have internal predecessors, (397096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:21,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131109 states to 131109 states and 397096 transitions. [2021-04-15 02:27:21,870 INFO L78 Accepts]: Start accepts. Automaton has 131109 states and 397096 transitions. Word has length 24 [2021-04-15 02:27:21,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:21,870 INFO L480 AbstractCegarLoop]: Abstraction has 131109 states and 397096 transitions. [2021-04-15 02:27:21,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 02:27:21,870 INFO L276 IsEmpty]: Start isEmpty. Operand 131109 states and 397096 transitions. [2021-04-15 02:27:21,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:27:21,913 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:21,913 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:22,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10587 [2021-04-15 02:27:22,114 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:22,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:22,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1192728492, now seen corresponding path program 291 times [2021-04-15 02:27:22,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:22,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130644160] [2021-04-15 02:27:22,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:22,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130644160] [2021-04-15 02:27:22,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866220580] [2021-04-15 02:27:22,194 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 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 02:27:22,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-04-15 02:27:22,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:22,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:27:22,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:22,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:22,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:27:22,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143626587] [2021-04-15 02:27:22,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:27:22,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:22,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:27:22,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:27:22,701 INFO L87 Difference]: Start difference. First operand 131109 states and 397096 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 02:27:23,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:23,388 INFO L93 Difference]: Finished difference Result 131340 states and 397434 transitions. [2021-04-15 02:27:23,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:27:23,389 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 24 [2021-04-15 02:27:23,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:23,643 INFO L225 Difference]: With dead ends: 131340 [2021-04-15 02:27:23,643 INFO L226 Difference]: Without dead ends: 131337 [2021-04-15 02:27:23,643 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 172.6ms TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:27:23,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131337 states. [2021-04-15 02:27:25,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131337 to 131102. [2021-04-15 02:27:26,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131102 states, 131101 states have (on average 3.0285733899817697) internal successors, (397049), 131101 states have internal predecessors, (397049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:26,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131102 states to 131102 states and 397049 transitions. [2021-04-15 02:27:26,429 INFO L78 Accepts]: Start accepts. Automaton has 131102 states and 397049 transitions. Word has length 24 [2021-04-15 02:27:26,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:26,429 INFO L480 AbstractCegarLoop]: Abstraction has 131102 states and 397049 transitions. [2021-04-15 02:27:26,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 02:27:26,429 INFO L276 IsEmpty]: Start isEmpty. Operand 131102 states and 397049 transitions. [2021-04-15 02:27:26,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:27:26,471 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:26,471 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:26,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10588,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:26,672 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:26,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:26,672 INFO L82 PathProgramCache]: Analyzing trace with hash 119643112, now seen corresponding path program 292 times [2021-04-15 02:27:26,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:26,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706494530] [2021-04-15 02:27:26,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:26,760 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:26,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706494530] [2021-04-15 02:27:26,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507201764] [2021-04-15 02:27:26,761 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 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 02:27:26,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:27:26,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:26,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:27:26,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:27:26,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:26,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-04-15 02:27:26,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707762554] [2021-04-15 02:27:26,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:27:26,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:26,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:27:26,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:27:26,825 INFO L87 Difference]: Start difference. First operand 131102 states and 397049 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:27:27,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:27,994 INFO L93 Difference]: Finished difference Result 131338 states and 397393 transitions. [2021-04-15 02:27:27,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:27:27,994 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 24 [2021-04-15 02:27:27,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:28,241 INFO L225 Difference]: With dead ends: 131338 [2021-04-15 02:27:28,241 INFO L226 Difference]: Without dead ends: 131333 [2021-04-15 02:27:28,241 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 176.5ms TimeCoverageRelationStatistics Valid=299, Invalid=631, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:27:28,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131333 states. [2021-04-15 02:27:30,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131333 to 131102. [2021-04-15 02:27:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131102 states, 131101 states have (on average 3.028352186482178) internal successors, (397020), 131101 states have internal predecessors, (397020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:30,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131102 states to 131102 states and 397020 transitions. [2021-04-15 02:27:30,903 INFO L78 Accepts]: Start accepts. Automaton has 131102 states and 397020 transitions. Word has length 24 [2021-04-15 02:27:30,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:30,903 INFO L480 AbstractCegarLoop]: Abstraction has 131102 states and 397020 transitions. [2021-04-15 02:27:30,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:27:30,904 INFO L276 IsEmpty]: Start isEmpty. Operand 131102 states and 397020 transitions. [2021-04-15 02:27:30,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:27:30,944 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:30,944 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:31,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10589 [2021-04-15 02:27:31,145 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:31,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:31,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1213734700, now seen corresponding path program 293 times [2021-04-15 02:27:31,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:31,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979616763] [2021-04-15 02:27:31,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:31,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979616763] [2021-04-15 02:27:31,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12215923] [2021-04-15 02:27:31,242 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 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 02:27:31,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-04-15 02:27:31,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:31,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:27:31,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:31,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:31,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:27:31,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464346348] [2021-04-15 02:27:31,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:27:31,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:31,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:27:31,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:27:31,313 INFO L87 Difference]: Start difference. First operand 131102 states and 397020 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 02:27:32,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:32,591 INFO L93 Difference]: Finished difference Result 131408 states and 397643 transitions. [2021-04-15 02:27:32,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:27:32,592 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 24 [2021-04-15 02:27:32,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:33,232 INFO L225 Difference]: With dead ends: 131408 [2021-04-15 02:27:33,232 INFO L226 Difference]: Without dead ends: 131405 [2021-04-15 02:27:33,232 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:27:33,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131405 states. [2021-04-15 02:27:35,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131405 to 131104. [2021-04-15 02:27:35,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131104 states, 131103 states have (on average 3.028328871192879) internal successors, (397023), 131103 states have internal predecessors, (397023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:36,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131104 states to 131104 states and 397023 transitions. [2021-04-15 02:27:36,060 INFO L78 Accepts]: Start accepts. Automaton has 131104 states and 397023 transitions. Word has length 24 [2021-04-15 02:27:36,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:36,061 INFO L480 AbstractCegarLoop]: Abstraction has 131104 states and 397023 transitions. [2021-04-15 02:27:36,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 02:27:36,061 INFO L276 IsEmpty]: Start isEmpty. Operand 131104 states and 397023 transitions. [2021-04-15 02:27:36,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:27:36,109 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:36,109 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:36,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10590,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:36,313 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:36,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:36,313 INFO L82 PathProgramCache]: Analyzing trace with hash 770835560, now seen corresponding path program 294 times [2021-04-15 02:27:36,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:36,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204743232] [2021-04-15 02:27:36,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:36,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:36,418 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:36,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204743232] [2021-04-15 02:27:36,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862923474] [2021-04-15 02:27:36,418 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 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 02:27:36,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-04-15 02:27:36,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:36,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:27:36,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:36,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:36,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:27:36,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283250167] [2021-04-15 02:27:36,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:27:36,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:36,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:27:36,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:27:36,489 INFO L87 Difference]: Start difference. First operand 131104 states and 397023 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 02:27:37,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:37,121 INFO L93 Difference]: Finished difference Result 131400 states and 397630 transitions. [2021-04-15 02:27:37,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:27:37,121 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 24 [2021-04-15 02:27:37,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:37,396 INFO L225 Difference]: With dead ends: 131400 [2021-04-15 02:27:37,396 INFO L226 Difference]: Without dead ends: 131396 [2021-04-15 02:27:37,396 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 173.7ms TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:27:37,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131396 states. [2021-04-15 02:27:39,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131396 to 131104. [2021-04-15 02:27:39,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131104 states, 131103 states have (on average 3.0283059884213177) internal successors, (397020), 131103 states have internal predecessors, (397020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:40,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131104 states to 131104 states and 397020 transitions. [2021-04-15 02:27:40,643 INFO L78 Accepts]: Start accepts. Automaton has 131104 states and 397020 transitions. Word has length 24 [2021-04-15 02:27:40,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:40,643 INFO L480 AbstractCegarLoop]: Abstraction has 131104 states and 397020 transitions. [2021-04-15 02:27:40,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 02:27:40,644 INFO L276 IsEmpty]: Start isEmpty. Operand 131104 states and 397020 transitions. [2021-04-15 02:27:40,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:27:40,685 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:40,685 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:40,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10591,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:40,885 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:40,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:40,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1666696844, now seen corresponding path program 295 times [2021-04-15 02:27:40,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:40,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206423706] [2021-04-15 02:27:40,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:40,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206423706] [2021-04-15 02:27:40,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122421807] [2021-04-15 02:27:40,971 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 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 02:27:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:40,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:27:40,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:27:41,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:41,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-04-15 02:27:41,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444478215] [2021-04-15 02:27:41,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:27:41,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:41,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:27:41,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:27:41,037 INFO L87 Difference]: Start difference. First operand 131104 states and 397020 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 02:27:41,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:41,679 INFO L93 Difference]: Finished difference Result 131360 states and 397542 transitions. [2021-04-15 02:27:41,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:27:41,680 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 24 [2021-04-15 02:27:41,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:41,936 INFO L225 Difference]: With dead ends: 131360 [2021-04-15 02:27:41,936 INFO L226 Difference]: Without dead ends: 131357 [2021-04-15 02:27:41,936 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:27:42,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131357 states. [2021-04-15 02:27:44,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131357 to 131089. [2021-04-15 02:27:44,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131089 states, 131088 states have (on average 3.0283626266324912) internal successors, (396982), 131088 states have internal predecessors, (396982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:44,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131089 states to 131089 states and 396982 transitions. [2021-04-15 02:27:44,732 INFO L78 Accepts]: Start accepts. Automaton has 131089 states and 396982 transitions. Word has length 24 [2021-04-15 02:27:44,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:44,732 INFO L480 AbstractCegarLoop]: Abstraction has 131089 states and 396982 transitions. [2021-04-15 02:27:44,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 02:27:44,732 INFO L276 IsEmpty]: Start isEmpty. Operand 131089 states and 396982 transitions. [2021-04-15 02:27:44,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:27:44,773 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:44,773 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:44,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10592 [2021-04-15 02:27:44,973 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:44,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:44,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1360813274, now seen corresponding path program 296 times [2021-04-15 02:27:44,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:44,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086132144] [2021-04-15 02:27:44,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:45,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086132144] [2021-04-15 02:27:45,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102446510] [2021-04-15 02:27:45,481 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:27:45,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:27:45,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:45,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:27:45,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:45,627 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:27:45,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:45,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-04-15 02:27:45,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840531283] [2021-04-15 02:27:45,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:27:45,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:45,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:27:45,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:27:45,628 INFO L87 Difference]: Start difference. First operand 131089 states and 396982 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:27:46,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:46,289 INFO L93 Difference]: Finished difference Result 131311 states and 397318 transitions. [2021-04-15 02:27:46,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:27:46,289 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 24 [2021-04-15 02:27:46,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:46,567 INFO L225 Difference]: With dead ends: 131311 [2021-04-15 02:27:46,567 INFO L226 Difference]: Without dead ends: 131308 [2021-04-15 02:27:46,568 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 589.9ms TimeCoverageRelationStatistics Valid=275, Invalid=595, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:27:46,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131308 states. [2021-04-15 02:27:48,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131308 to 131087. [2021-04-15 02:27:48,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131087 states, 131086 states have (on average 3.028195230611965) internal successors, (396954), 131086 states have internal predecessors, (396954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:49,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131087 states to 131087 states and 396954 transitions. [2021-04-15 02:27:49,279 INFO L78 Accepts]: Start accepts. Automaton has 131087 states and 396954 transitions. Word has length 24 [2021-04-15 02:27:49,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:49,279 INFO L480 AbstractCegarLoop]: Abstraction has 131087 states and 396954 transitions. [2021-04-15 02:27:49,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:27:49,279 INFO L276 IsEmpty]: Start isEmpty. Operand 131087 states and 396954 transitions. [2021-04-15 02:27:49,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:27:49,321 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:49,321 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:49,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10593,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:49,521 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:49,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:49,522 INFO L82 PathProgramCache]: Analyzing trace with hash 917914134, now seen corresponding path program 297 times [2021-04-15 02:27:49,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:49,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310870852] [2021-04-15 02:27:49,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:49,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310870852] [2021-04-15 02:27:49,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443317271] [2021-04-15 02:27:49,619 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 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 02:27:49,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-04-15 02:27:49,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:49,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:27:49,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:49,689 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:49,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:49,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:27:49,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178832838] [2021-04-15 02:27:49,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:27:49,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:49,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:27:49,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:27:49,690 INFO L87 Difference]: Start difference. First operand 131087 states and 396954 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 02:27:50,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:50,869 INFO L93 Difference]: Finished difference Result 131552 states and 397896 transitions. [2021-04-15 02:27:50,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:27:50,870 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 24 [2021-04-15 02:27:50,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:51,153 INFO L225 Difference]: With dead ends: 131552 [2021-04-15 02:27:51,153 INFO L226 Difference]: Without dead ends: 131544 [2021-04-15 02:27:51,153 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 196.6ms TimeCoverageRelationStatistics Valid=290, Invalid=640, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:27:51,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131544 states. [2021-04-15 02:27:53,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131544 to 131094. [2021-04-15 02:27:53,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131094 states, 131093 states have (on average 3.0281555842035806) internal successors, (396970), 131093 states have internal predecessors, (396970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:53,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131094 states to 131094 states and 396970 transitions. [2021-04-15 02:27:53,903 INFO L78 Accepts]: Start accepts. Automaton has 131094 states and 396970 transitions. Word has length 24 [2021-04-15 02:27:53,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:53,904 INFO L480 AbstractCegarLoop]: Abstraction has 131094 states and 396970 transitions. [2021-04-15 02:27:53,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 02:27:53,904 INFO L276 IsEmpty]: Start isEmpty. Operand 131094 states and 396970 transitions. [2021-04-15 02:27:53,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:27:53,948 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:53,948 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:54,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10594,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:54,149 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:54,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:54,149 INFO L82 PathProgramCache]: Analyzing trace with hash 52834514, now seen corresponding path program 298 times [2021-04-15 02:27:54,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:54,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068888067] [2021-04-15 02:27:54,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:27:54,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068888067] [2021-04-15 02:27:54,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324646403] [2021-04-15 02:27:54,220 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 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 02:27:54,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:27:54,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:54,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:27:54,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:54,293 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:27:54,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:54,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:27:54,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083540610] [2021-04-15 02:27:54,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:27:54,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:54,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:27:54,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:27:54,294 INFO L87 Difference]: Start difference. First operand 131094 states and 396970 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 02:27:55,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:55,350 INFO L93 Difference]: Finished difference Result 131378 states and 397470 transitions. [2021-04-15 02:27:55,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:27:55,350 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 24 [2021-04-15 02:27:55,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:55,691 INFO L225 Difference]: With dead ends: 131378 [2021-04-15 02:27:55,692 INFO L226 Difference]: Without dead ends: 131378 [2021-04-15 02:27:55,692 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=114, Invalid=158, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:27:55,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131378 states. [2021-04-15 02:27:57,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131378 to 131115. [2021-04-15 02:27:57,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131115 states, 131114 states have (on average 3.0280900590325976) internal successors, (397025), 131114 states have internal predecessors, (397025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:58,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131115 states to 131115 states and 397025 transitions. [2021-04-15 02:27:58,277 INFO L78 Accepts]: Start accepts. Automaton has 131115 states and 397025 transitions. Word has length 24 [2021-04-15 02:27:58,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:58,277 INFO L480 AbstractCegarLoop]: Abstraction has 131115 states and 397025 transitions. [2021-04-15 02:27:58,277 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 02:27:58,277 INFO L276 IsEmpty]: Start isEmpty. Operand 131115 states and 397025 transitions. [2021-04-15 02:27:58,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:27:58,322 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:58,322 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:58,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10595 [2021-04-15 02:27:58,523 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:58,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:58,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1798289204, now seen corresponding path program 299 times [2021-04-15 02:27:58,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:58,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933313769] [2021-04-15 02:27:58,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:27:58,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933313769] [2021-04-15 02:27:58,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678381359] [2021-04-15 02:27:58,589 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 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 02:27:58,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:27:58,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:58,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:27:58,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:58,665 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:27:58,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:58,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-04-15 02:27:58,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639035777] [2021-04-15 02:27:58,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:27:58,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:58,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:27:58,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:27:58,665 INFO L87 Difference]: Start difference. First operand 131115 states and 397025 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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 02:27:59,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:59,198 INFO L93 Difference]: Finished difference Result 131464 states and 397561 transitions. [2021-04-15 02:27:59,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:27:59,198 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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 24 [2021-04-15 02:27:59,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:59,450 INFO L225 Difference]: With dead ends: 131464 [2021-04-15 02:27:59,450 INFO L226 Difference]: Without dead ends: 131461 [2021-04-15 02:27:59,451 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:28:00,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131461 states. [2021-04-15 02:28:02,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131461 to 131127. [2021-04-15 02:28:02,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131127 states, 131126 states have (on average 3.0277290544972013) internal successors, (397014), 131126 states have internal predecessors, (397014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:02,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131127 states to 131127 states and 397014 transitions. [2021-04-15 02:28:02,549 INFO L78 Accepts]: Start accepts. Automaton has 131127 states and 397014 transitions. Word has length 24 [2021-04-15 02:28:02,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:02,549 INFO L480 AbstractCegarLoop]: Abstraction has 131127 states and 397014 transitions. [2021-04-15 02:28:02,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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 02:28:02,549 INFO L276 IsEmpty]: Start isEmpty. Operand 131127 states and 397014 transitions. [2021-04-15 02:28:02,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:28:02,595 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:02,595 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:02,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10596 [2021-04-15 02:28:02,796 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:02,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:02,796 INFO L82 PathProgramCache]: Analyzing trace with hash 703340212, now seen corresponding path program 300 times [2021-04-15 02:28:02,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:02,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669332011] [2021-04-15 02:28:02,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:02,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669332011] [2021-04-15 02:28:02,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216983383] [2021-04-15 02:28:02,880 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 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 02:28:02,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:28:02,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:02,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:28:02,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:02,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:02,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:28:02,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267064023] [2021-04-15 02:28:02,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:28:02,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:02,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:28:02,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:28:02,953 INFO L87 Difference]: Start difference. First operand 131127 states and 397014 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 02:28:03,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:03,608 INFO L93 Difference]: Finished difference Result 131365 states and 397357 transitions. [2021-04-15 02:28:03,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:28:03,609 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 24 [2021-04-15 02:28:03,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:03,873 INFO L225 Difference]: With dead ends: 131365 [2021-04-15 02:28:03,874 INFO L226 Difference]: Without dead ends: 131358 [2021-04-15 02:28:03,874 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 157.7ms TimeCoverageRelationStatistics Valid=248, Invalid=508, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:28:03,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131358 states. [2021-04-15 02:28:06,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131358 to 131081. [2021-04-15 02:28:06,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131081 states, 131080 states have (on average 3.0275785779676534) internal successors, (396855), 131080 states have internal predecessors, (396855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:07,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131081 states to 131081 states and 396855 transitions. [2021-04-15 02:28:07,214 INFO L78 Accepts]: Start accepts. Automaton has 131081 states and 396855 transitions. Word has length 24 [2021-04-15 02:28:07,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:07,214 INFO L480 AbstractCegarLoop]: Abstraction has 131081 states and 396855 transitions. [2021-04-15 02:28:07,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 02:28:07,214 INFO L276 IsEmpty]: Start isEmpty. Operand 131081 states and 396855 transitions. [2021-04-15 02:28:07,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:28:07,257 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:07,257 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:07,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10597 [2021-04-15 02:28:07,458 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:07,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:07,458 INFO L82 PathProgramCache]: Analyzing trace with hash -369745168, now seen corresponding path program 301 times [2021-04-15 02:28:07,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:07,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431242819] [2021-04-15 02:28:07,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 27 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:07,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431242819] [2021-04-15 02:28:07,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289031964] [2021-04-15 02:28:07,543 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 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 02:28:07,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:07,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:28:07,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:28:07,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:07,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-04-15 02:28:07,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699838801] [2021-04-15 02:28:07,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:28:07,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:07,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:28:07,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:28:07,614 INFO L87 Difference]: Start difference. First operand 131081 states and 396855 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:28:08,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:08,252 INFO L93 Difference]: Finished difference Result 131320 states and 397204 transitions. [2021-04-15 02:28:08,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:28:08,252 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 24 [2021-04-15 02:28:08,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:08,502 INFO L225 Difference]: With dead ends: 131320 [2021-04-15 02:28:08,503 INFO L226 Difference]: Without dead ends: 131315 [2021-04-15 02:28:08,503 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 171.4ms TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:28:08,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131315 states. [2021-04-15 02:28:10,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131315 to 131074. [2021-04-15 02:28:10,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131074 states, 131073 states have (on average 3.0273053947037147) internal successors, (396798), 131073 states have internal predecessors, (396798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:11,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131074 states to 131074 states and 396798 transitions. [2021-04-15 02:28:11,277 INFO L78 Accepts]: Start accepts. Automaton has 131074 states and 396798 transitions. Word has length 24 [2021-04-15 02:28:11,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:11,277 INFO L480 AbstractCegarLoop]: Abstraction has 131074 states and 396798 transitions. [2021-04-15 02:28:11,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:28:11,278 INFO L276 IsEmpty]: Start isEmpty. Operand 131074 states and 396798 transitions. [2021-04-15 02:28:11,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:28:11,319 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:11,319 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:11,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10598,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:11,520 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:11,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:11,520 INFO L82 PathProgramCache]: Analyzing trace with hash 724346420, now seen corresponding path program 302 times [2021-04-15 02:28:11,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:11,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358683057] [2021-04-15 02:28:11,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:12,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358683057] [2021-04-15 02:28:12,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665432994] [2021-04-15 02:28:12,033 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 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 02:28:12,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:28:12,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:12,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:28:12,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:28:12,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:12,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-04-15 02:28:12,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512294146] [2021-04-15 02:28:12,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:28:12,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:12,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:28:12,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:28:12,207 INFO L87 Difference]: Start difference. First operand 131074 states and 396798 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 02:28:12,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:12,884 INFO L93 Difference]: Finished difference Result 131318 states and 397153 transitions. [2021-04-15 02:28:12,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:28:12,885 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 24 [2021-04-15 02:28:12,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:13,167 INFO L225 Difference]: With dead ends: 131318 [2021-04-15 02:28:13,168 INFO L226 Difference]: Without dead ends: 131312 [2021-04-15 02:28:13,168 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 622.2ms TimeCoverageRelationStatistics Valid=317, Invalid=675, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:28:13,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131312 states. [2021-04-15 02:28:15,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131312 to 131075. [2021-04-15 02:28:15,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131075 states, 131074 states have (on average 3.026984756702321) internal successors, (396759), 131074 states have internal predecessors, (396759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:15,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131075 states to 131075 states and 396759 transitions. [2021-04-15 02:28:15,984 INFO L78 Accepts]: Start accepts. Automaton has 131075 states and 396759 transitions. Word has length 24 [2021-04-15 02:28:15,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:15,984 INFO L480 AbstractCegarLoop]: Abstraction has 131075 states and 396759 transitions. [2021-04-15 02:28:15,984 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 02:28:15,984 INFO L276 IsEmpty]: Start isEmpty. Operand 131075 states and 396759 transitions. [2021-04-15 02:28:16,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:28:16,025 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:16,025 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:16,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10599 [2021-04-15 02:28:16,226 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:16,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:16,226 INFO L82 PathProgramCache]: Analyzing trace with hash 281447280, now seen corresponding path program 303 times [2021-04-15 02:28:16,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:16,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572717485] [2021-04-15 02:28:16,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:16,322 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:16,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572717485] [2021-04-15 02:28:16,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921251914] [2021-04-15 02:28:16,322 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 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 02:28:16,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-04-15 02:28:16,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:16,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:28:16,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:16,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:16,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-04-15 02:28:16,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282716823] [2021-04-15 02:28:16,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:28:16,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:16,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:28:16,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:28:16,401 INFO L87 Difference]: Start difference. First operand 131075 states and 396759 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 02:28:17,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:17,568 INFO L93 Difference]: Finished difference Result 131674 states and 397979 transitions. [2021-04-15 02:28:17,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:28:17,569 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 24 [2021-04-15 02:28:17,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:17,833 INFO L225 Difference]: With dead ends: 131674 [2021-04-15 02:28:17,834 INFO L226 Difference]: Without dead ends: 131666 [2021-04-15 02:28:17,834 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 211.3ms TimeCoverageRelationStatistics Valid=332, Invalid=724, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:28:17,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131666 states. [2021-04-15 02:28:20,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131666 to 131083. [2021-04-15 02:28:20,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131083 states, 131082 states have (on average 3.026937336934133) internal successors, (396777), 131082 states have internal predecessors, (396777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:20,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131083 states to 131083 states and 396777 transitions. [2021-04-15 02:28:20,518 INFO L78 Accepts]: Start accepts. Automaton has 131083 states and 396777 transitions. Word has length 24 [2021-04-15 02:28:20,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:20,518 INFO L480 AbstractCegarLoop]: Abstraction has 131083 states and 396777 transitions. [2021-04-15 02:28:20,519 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 02:28:20,519 INFO L276 IsEmpty]: Start isEmpty. Operand 131083 states and 396777 transitions. [2021-04-15 02:28:20,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:28:20,563 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:20,563 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:20,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10600 [2021-04-15 02:28:20,763 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:20,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:20,764 INFO L82 PathProgramCache]: Analyzing trace with hash -563524172, now seen corresponding path program 304 times [2021-04-15 02:28:20,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:20,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802826754] [2021-04-15 02:28:20,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 39 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:20,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802826754] [2021-04-15 02:28:20,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486695155] [2021-04-15 02:28:20,869 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 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 02:28:20,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:28:20,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:20,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:28:20,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:20,942 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:28:20,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:20,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-04-15 02:28:20,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196959326] [2021-04-15 02:28:20,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:28:20,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:20,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:28:20,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:28:20,943 INFO L87 Difference]: Start difference. First operand 131083 states and 396777 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 02:28:22,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:22,168 INFO L93 Difference]: Finished difference Result 131661 states and 397955 transitions. [2021-04-15 02:28:22,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:28:22,181 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 24 [2021-04-15 02:28:22,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:22,506 INFO L225 Difference]: With dead ends: 131661 [2021-04-15 02:28:22,506 INFO L226 Difference]: Without dead ends: 131646 [2021-04-15 02:28:22,507 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 226.8ms TimeCoverageRelationStatistics Valid=330, Invalid=726, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:28:22,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131646 states. [2021-04-15 02:28:24,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131646 to 131092. [2021-04-15 02:28:24,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131092 states, 131091 states have (on average 3.0268515763858694) internal successors, (396793), 131091 states have internal predecessors, (396793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:25,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131092 states to 131092 states and 396793 transitions. [2021-04-15 02:28:25,081 INFO L78 Accepts]: Start accepts. Automaton has 131092 states and 396793 transitions. Word has length 24 [2021-04-15 02:28:25,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:25,081 INFO L480 AbstractCegarLoop]: Abstraction has 131092 states and 396793 transitions. [2021-04-15 02:28:25,081 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 02:28:25,081 INFO L276 IsEmpty]: Start isEmpty. Operand 131092 states and 396793 transitions. [2021-04-15 02:28:25,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:28:25,128 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:25,128 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:25,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10601 [2021-04-15 02:28:25,329 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:25,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:25,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1182382632, now seen corresponding path program 305 times [2021-04-15 02:28:25,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:25,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989247221] [2021-04-15 02:28:25,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:25,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989247221] [2021-04-15 02:28:25,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066147022] [2021-04-15 02:28:25,461 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 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 02:28:25,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 02:28:25,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:25,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:28:25,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:25,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:25,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:28:25,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307781196] [2021-04-15 02:28:25,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:28:25,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:25,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:28:25,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:28:25,544 INFO L87 Difference]: Start difference. First operand 131092 states and 396793 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 02:28:26,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:26,709 INFO L93 Difference]: Finished difference Result 131394 states and 397427 transitions. [2021-04-15 02:28:26,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:28:26,709 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 24 [2021-04-15 02:28:26,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:26,990 INFO L225 Difference]: With dead ends: 131394 [2021-04-15 02:28:26,991 INFO L226 Difference]: Without dead ends: 131390 [2021-04-15 02:28:26,991 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 208.6ms TimeCoverageRelationStatistics Valid=252, Invalid=560, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:28:27,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131390 states. [2021-04-15 02:28:29,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131390 to 131082. [2021-04-15 02:28:29,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131082 states, 131081 states have (on average 3.0267544495388345) internal successors, (396750), 131081 states have internal predecessors, (396750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:29,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131082 states to 131082 states and 396750 transitions. [2021-04-15 02:28:29,508 INFO L78 Accepts]: Start accepts. Automaton has 131082 states and 396750 transitions. Word has length 24 [2021-04-15 02:28:29,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:29,508 INFO L480 AbstractCegarLoop]: Abstraction has 131082 states and 396750 transitions. [2021-04-15 02:28:29,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 02:28:29,509 INFO L276 IsEmpty]: Start isEmpty. Operand 131082 states and 396750 transitions. [2021-04-15 02:28:29,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:28:29,552 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:29,552 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:29,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10602 [2021-04-15 02:28:29,753 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:29,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:29,753 INFO L82 PathProgramCache]: Analyzing trace with hash 545915778, now seen corresponding path program 306 times [2021-04-15 02:28:29,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:29,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910862445] [2021-04-15 02:28:29,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:29,847 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:29,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910862445] [2021-04-15 02:28:29,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125761946] [2021-04-15 02:28:29,848 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 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 02:28:29,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:28:29,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:29,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:28:29,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:29,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:29,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-04-15 02:28:29,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289815406] [2021-04-15 02:28:29,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:28:29,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:29,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:28:29,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:28:29,927 INFO L87 Difference]: Start difference. First operand 131082 states and 396750 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 02:28:30,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:30,571 INFO L93 Difference]: Finished difference Result 131351 states and 397199 transitions. [2021-04-15 02:28:30,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:28:30,572 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 24 [2021-04-15 02:28:30,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:30,845 INFO L225 Difference]: With dead ends: 131351 [2021-04-15 02:28:30,845 INFO L226 Difference]: Without dead ends: 131347 [2021-04-15 02:28:30,845 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=291, Invalid=639, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:28:31,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131347 states. [2021-04-15 02:28:33,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131347 to 131079. [2021-04-15 02:28:33,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131079 states, 131078 states have (on average 3.0264804162407115) internal successors, (396705), 131078 states have internal predecessors, (396705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:34,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131079 states to 131079 states and 396705 transitions. [2021-04-15 02:28:34,405 INFO L78 Accepts]: Start accepts. Automaton has 131079 states and 396705 transitions. Word has length 24 [2021-04-15 02:28:34,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:34,405 INFO L480 AbstractCegarLoop]: Abstraction has 131079 states and 396705 transitions. [2021-04-15 02:28:34,405 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 02:28:34,406 INFO L276 IsEmpty]: Start isEmpty. Operand 131079 states and 396705 transitions. [2021-04-15 02:28:34,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:28:34,462 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:34,462 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:34,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10603,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:34,683 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:34,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:34,684 INFO L82 PathProgramCache]: Analyzing trace with hash -299055674, now seen corresponding path program 307 times [2021-04-15 02:28:34,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:34,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686416062] [2021-04-15 02:28:34,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:34,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686416062] [2021-04-15 02:28:34,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354445337] [2021-04-15 02:28:34,816 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 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 02:28:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:34,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:28:34,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:28:34,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:34,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-04-15 02:28:34,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635207400] [2021-04-15 02:28:34,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:28:34,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:34,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:28:34,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:28:34,908 INFO L87 Difference]: Start difference. First operand 131079 states and 396705 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 02:28:35,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:35,735 INFO L93 Difference]: Finished difference Result 131763 states and 398113 transitions. [2021-04-15 02:28:35,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:28:35,735 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 24 [2021-04-15 02:28:35,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:36,078 INFO L225 Difference]: With dead ends: 131763 [2021-04-15 02:28:36,079 INFO L226 Difference]: Without dead ends: 131748 [2021-04-15 02:28:36,079 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 262.3ms TimeCoverageRelationStatistics Valid=327, Invalid=729, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:28:36,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131748 states. [2021-04-15 02:28:38,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131748 to 131119. [2021-04-15 02:28:38,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131119 states, 131118 states have (on average 3.0261825226132184) internal successors, (396787), 131118 states have internal predecessors, (396787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:38,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131119 states to 131119 states and 396787 transitions. [2021-04-15 02:28:38,798 INFO L78 Accepts]: Start accepts. Automaton has 131119 states and 396787 transitions. Word has length 24 [2021-04-15 02:28:38,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:38,798 INFO L480 AbstractCegarLoop]: Abstraction has 131119 states and 396787 transitions. [2021-04-15 02:28:38,798 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 02:28:38,798 INFO L276 IsEmpty]: Start isEmpty. Operand 131119 states and 396787 transitions. [2021-04-15 02:28:38,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:28:38,839 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:38,839 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:39,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10604 [2021-04-15 02:28:39,039 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:39,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:39,040 INFO L82 PathProgramCache]: Analyzing trace with hash 2061667018, now seen corresponding path program 308 times [2021-04-15 02:28:39,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:39,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883764895] [2021-04-15 02:28:39,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:28:39,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883764895] [2021-04-15 02:28:39,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682931395] [2021-04-15 02:28:39,102 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 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 02:28:39,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:28:39,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:39,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:28:39,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 21 proven. 59 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:28:39,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:39,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-04-15 02:28:39,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667133188] [2021-04-15 02:28:39,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:28:39,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:39,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:28:39,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:28:39,176 INFO L87 Difference]: Start difference. First operand 131119 states and 396787 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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 02:28:40,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:40,204 INFO L93 Difference]: Finished difference Result 131485 states and 397395 transitions. [2021-04-15 02:28:40,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:28:40,205 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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 24 [2021-04-15 02:28:40,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:40,450 INFO L225 Difference]: With dead ends: 131485 [2021-04-15 02:28:40,450 INFO L226 Difference]: Without dead ends: 131485 [2021-04-15 02:28:40,450 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=133, Invalid=209, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:28:40,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131485 states. [2021-04-15 02:28:42,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131485 to 131093. [2021-04-15 02:28:42,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131093 states, 131092 states have (on average 3.025852073353065) internal successors, (396665), 131092 states have internal predecessors, (396665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:43,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131093 states to 131093 states and 396665 transitions. [2021-04-15 02:28:43,174 INFO L78 Accepts]: Start accepts. Automaton has 131093 states and 396665 transitions. Word has length 24 [2021-04-15 02:28:43,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:43,174 INFO L480 AbstractCegarLoop]: Abstraction has 131093 states and 396665 transitions. [2021-04-15 02:28:43,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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 02:28:43,174 INFO L276 IsEmpty]: Start isEmpty. Operand 131093 states and 396665 transitions. [2021-04-15 02:28:43,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:28:43,215 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:43,215 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:43,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10605,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:43,416 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:43,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1582794580, now seen corresponding path program 309 times [2021-04-15 02:28:43,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:43,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685545200] [2021-04-15 02:28:43,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:43,492 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:43,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685545200] [2021-04-15 02:28:43,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921270067] [2021-04-15 02:28:43,493 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 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 02:28:43,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-04-15 02:28:43,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:43,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:28:43,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:43,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:43,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:28:43,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141023868] [2021-04-15 02:28:43,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:28:43,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:43,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:28:43,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:28:43,565 INFO L87 Difference]: Start difference. First operand 131093 states and 396665 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 02:28:44,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:44,755 INFO L93 Difference]: Finished difference Result 131333 states and 397012 transitions. [2021-04-15 02:28:44,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:28:44,756 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 24 [2021-04-15 02:28:44,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:45,023 INFO L225 Difference]: With dead ends: 131333 [2021-04-15 02:28:45,023 INFO L226 Difference]: Without dead ends: 131328 [2021-04-15 02:28:45,024 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 143.0ms TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:28:45,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131328 states. [2021-04-15 02:28:47,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131328 to 131072. [2021-04-15 02:28:47,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131072 states, 131071 states have (on average 3.0252458591145257) internal successors, (396522), 131071 states have internal predecessors, (396522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:47,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131072 states to 131072 states and 396522 transitions. [2021-04-15 02:28:47,642 INFO L78 Accepts]: Start accepts. Automaton has 131072 states and 396522 transitions. Word has length 24 [2021-04-15 02:28:47,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:47,642 INFO L480 AbstractCegarLoop]: Abstraction has 131072 states and 396522 transitions. [2021-04-15 02:28:47,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 02:28:47,642 INFO L276 IsEmpty]: Start isEmpty. Operand 131072 states and 396522 transitions. [2021-04-15 02:28:47,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:28:47,684 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:47,684 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:47,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10606,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:47,884 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:47,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:47,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1639087336, now seen corresponding path program 310 times [2021-04-15 02:28:47,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:47,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956500820] [2021-04-15 02:28:47,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:47,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956500820] [2021-04-15 02:28:47,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375843476] [2021-04-15 02:28:47,963 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 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 02:28:47,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:28:47,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:47,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:28:47,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:48,034 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:28:48,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:48,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-04-15 02:28:48,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049850122] [2021-04-15 02:28:48,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:28:48,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:48,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:28:48,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:28:48,035 INFO L87 Difference]: Start difference. First operand 131072 states and 396522 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:28:49,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:49,212 INFO L93 Difference]: Finished difference Result 131314 states and 396874 transitions. [2021-04-15 02:28:49,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:28:49,229 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 24 [2021-04-15 02:28:49,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:49,521 INFO L225 Difference]: With dead ends: 131314 [2021-04-15 02:28:49,522 INFO L226 Difference]: Without dead ends: 131309 [2021-04-15 02:28:49,522 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 163.0ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:28:49,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131309 states. [2021-04-15 02:28:51,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131309 to 131072. [2021-04-15 02:28:51,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131072 states, 131071 states have (on average 3.024261659711149) internal successors, (396393), 131071 states have internal predecessors, (396393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:52,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131072 states to 131072 states and 396393 transitions. [2021-04-15 02:28:52,029 INFO L78 Accepts]: Start accepts. Automaton has 131072 states and 396393 transitions. Word has length 24 [2021-04-15 02:28:52,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:52,029 INFO L480 AbstractCegarLoop]: Abstraction has 131072 states and 396393 transitions. [2021-04-15 02:28:52,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:28:52,029 INFO L276 IsEmpty]: Start isEmpty. Operand 131072 states and 396393 transitions. [2021-04-15 02:28:52,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:28:52,074 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:52,074 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:52,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10607,312 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:52,275 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:52,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:52,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1561788372, now seen corresponding path program 311 times [2021-04-15 02:28:52,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:52,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683388403] [2021-04-15 02:28:52,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:52,362 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:52,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683388403] [2021-04-15 02:28:52,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601055498] [2021-04-15 02:28:52,363 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 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 02:28:52,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:28:52,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:52,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:28:52,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:52,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:52,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:28:52,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659531943] [2021-04-15 02:28:52,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:28:52,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:52,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:28:52,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:28:52,440 INFO L87 Difference]: Start difference. First operand 131072 states and 396393 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 02:28:53,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:53,060 INFO L93 Difference]: Finished difference Result 132743 states and 399958 transitions. [2021-04-15 02:28:53,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:28:53,061 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 24 [2021-04-15 02:28:53,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:53,337 INFO L225 Difference]: With dead ends: 132743 [2021-04-15 02:28:53,337 INFO L226 Difference]: Without dead ends: 132740 [2021-04-15 02:28:53,338 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:28:54,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132740 states. [2021-04-15 02:28:56,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132740 to 131072. [2021-04-15 02:28:56,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131072 states, 131071 states have (on average 3.0241853651837554) internal successors, (396383), 131071 states have internal predecessors, (396383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:56,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131072 states to 131072 states and 396383 transitions. [2021-04-15 02:28:56,515 INFO L78 Accepts]: Start accepts. Automaton has 131072 states and 396383 transitions. Word has length 24 [2021-04-15 02:28:56,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:56,515 INFO L480 AbstractCegarLoop]: Abstraction has 131072 states and 396383 transitions. [2021-04-15 02:28:56,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 02:28:56,515 INFO L276 IsEmpty]: Start isEmpty. Operand 131072 states and 396383 transitions. [2021-04-15 02:28:56,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:28:56,552 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:56,552 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:56,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10608,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:56,752 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:56,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:56,752 INFO L82 PathProgramCache]: Analyzing trace with hash -2004687512, now seen corresponding path program 312 times [2021-04-15 02:28:56,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:56,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014850433] [2021-04-15 02:28:56,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:56,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014850433] [2021-04-15 02:28:56,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700340862] [2021-04-15 02:28:56,848 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 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 02:28:56,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:28:56,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:56,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:28:56,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:56,927 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:56,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:56,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-04-15 02:28:56,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75699944] [2021-04-15 02:28:56,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:28:56,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:56,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:28:56,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:28:56,928 INFO L87 Difference]: Start difference. First operand 131072 states and 396383 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 02:28:57,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:57,532 INFO L93 Difference]: Finished difference Result 132748 states and 399952 transitions. [2021-04-15 02:28:57,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:28:57,532 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 24 [2021-04-15 02:28:57,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:57,795 INFO L225 Difference]: With dead ends: 132748 [2021-04-15 02:28:57,795 INFO L226 Difference]: Without dead ends: 132740 [2021-04-15 02:28:57,795 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 181.5ms TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:28:57,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132740 states. [2021-04-15 02:29:00,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132740 to 131124. [2021-04-15 02:29:00,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131124 states, 131123 states have (on average 3.0238097053911215) internal successors, (396491), 131123 states have internal predecessors, (396491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:01,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131124 states to 131124 states and 396491 transitions. [2021-04-15 02:29:01,029 INFO L78 Accepts]: Start accepts. Automaton has 131124 states and 396491 transitions. Word has length 24 [2021-04-15 02:29:01,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:01,029 INFO L480 AbstractCegarLoop]: Abstraction has 131124 states and 396491 transitions. [2021-04-15 02:29:01,029 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 02:29:01,029 INFO L276 IsEmpty]: Start isEmpty. Operand 131124 states and 396491 transitions. [2021-04-15 02:29:01,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:29:01,075 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:01,075 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:01,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10609,314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:01,276 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:01,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:01,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1445308332, now seen corresponding path program 313 times [2021-04-15 02:29:01,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:01,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045283938] [2021-04-15 02:29:01,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:01,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045283938] [2021-04-15 02:29:01,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530179273] [2021-04-15 02:29:01,376 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 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 02:29:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:01,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:01,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:29:01,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:01,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-04-15 02:29:01,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962068933] [2021-04-15 02:29:01,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:01,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:01,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:01,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:01,451 INFO L87 Difference]: Start difference. First operand 131124 states and 396491 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 02:29:02,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:02,078 INFO L93 Difference]: Finished difference Result 131783 states and 397838 transitions. [2021-04-15 02:29:02,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:29:02,080 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 24 [2021-04-15 02:29:02,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:02,369 INFO L225 Difference]: With dead ends: 131783 [2021-04-15 02:29:02,369 INFO L226 Difference]: Without dead ends: 131778 [2021-04-15 02:29:02,369 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 193.7ms TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:29:02,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131778 states. [2021-04-15 02:29:04,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131778 to 131124. [2021-04-15 02:29:04,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131124 states, 131123 states have (on average 3.023794452536931) internal successors, (396489), 131123 states have internal predecessors, (396489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:05,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131124 states to 131124 states and 396489 transitions. [2021-04-15 02:29:05,135 INFO L78 Accepts]: Start accepts. Automaton has 131124 states and 396489 transitions. Word has length 24 [2021-04-15 02:29:05,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:05,135 INFO L480 AbstractCegarLoop]: Abstraction has 131124 states and 396489 transitions. [2021-04-15 02:29:05,135 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 02:29:05,135 INFO L276 IsEmpty]: Start isEmpty. Operand 131124 states and 396489 transitions. [2021-04-15 02:29:05,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:29:05,178 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:05,178 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:05,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10610,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:05,379 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:05,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:05,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1020997096, now seen corresponding path program 314 times [2021-04-15 02:29:05,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:05,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737820505] [2021-04-15 02:29:05,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:05,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:05,498 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:05,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737820505] [2021-04-15 02:29:05,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050883090] [2021-04-15 02:29:05,498 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 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 02:29:05,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:05,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:05,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:05,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:05,955 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-04-15 02:29:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:29:05,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:05,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-04-15 02:29:05,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046373526] [2021-04-15 02:29:05,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:05,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:05,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:05,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:05,984 INFO L87 Difference]: Start difference. First operand 131124 states and 396489 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 02:29:06,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:06,688 INFO L93 Difference]: Finished difference Result 131712 states and 397702 transitions. [2021-04-15 02:29:06,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:29:06,689 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 24 [2021-04-15 02:29:06,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:06,971 INFO L225 Difference]: With dead ends: 131712 [2021-04-15 02:29:06,971 INFO L226 Difference]: Without dead ends: 131706 [2021-04-15 02:29:06,971 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 231.0ms TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:29:07,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131706 states. [2021-04-15 02:29:09,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131706 to 131124. [2021-04-15 02:29:09,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131124 states, 131123 states have (on average 3.023779199682741) internal successors, (396487), 131123 states have internal predecessors, (396487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:09,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131124 states to 131124 states and 396487 transitions. [2021-04-15 02:29:09,664 INFO L78 Accepts]: Start accepts. Automaton has 131124 states and 396487 transitions. Word has length 24 [2021-04-15 02:29:09,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:09,664 INFO L480 AbstractCegarLoop]: Abstraction has 131124 states and 396487 transitions. [2021-04-15 02:29:09,664 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 02:29:09,664 INFO L276 IsEmpty]: Start isEmpty. Operand 131124 states and 396487 transitions. [2021-04-15 02:29:09,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:29:09,709 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:09,709 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:09,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10611,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:09,910 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:09,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:09,910 INFO L82 PathProgramCache]: Analyzing trace with hash -690466828, now seen corresponding path program 315 times [2021-04-15 02:29:09,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:09,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457184460] [2021-04-15 02:29:09,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:10,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457184460] [2021-04-15 02:29:10,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988294925] [2021-04-15 02:29:10,020 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 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 02:29:10,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:29:10,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:10,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:29:10,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:10,131 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:10,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:10,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-04-15 02:29:10,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182781855] [2021-04-15 02:29:10,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:10,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:10,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:10,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:10,132 INFO L87 Difference]: Start difference. First operand 131124 states and 396487 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 02:29:11,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:11,303 INFO L93 Difference]: Finished difference Result 131475 states and 397232 transitions. [2021-04-15 02:29:11,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:29:11,303 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 24 [2021-04-15 02:29:11,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:11,573 INFO L225 Difference]: With dead ends: 131475 [2021-04-15 02:29:11,573 INFO L226 Difference]: Without dead ends: 131470 [2021-04-15 02:29:11,573 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 196.5ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:29:11,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131470 states. [2021-04-15 02:29:13,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131470 to 131115. [2021-04-15 02:29:13,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131115 states, 131114 states have (on average 3.0236435468371035) internal successors, (396442), 131114 states have internal predecessors, (396442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:14,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131115 states to 131115 states and 396442 transitions. [2021-04-15 02:29:14,229 INFO L78 Accepts]: Start accepts. Automaton has 131115 states and 396442 transitions. Word has length 24 [2021-04-15 02:29:14,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:14,229 INFO L480 AbstractCegarLoop]: Abstraction has 131115 states and 396442 transitions. [2021-04-15 02:29:14,230 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 02:29:14,230 INFO L276 IsEmpty]: Start isEmpty. Operand 131115 states and 396442 transitions. [2021-04-15 02:29:14,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:29:14,271 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:14,271 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:14,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10612 [2021-04-15 02:29:14,472 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:14,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:14,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1053897178, now seen corresponding path program 316 times [2021-04-15 02:29:14,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:14,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866932354] [2021-04-15 02:29:14,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:14,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866932354] [2021-04-15 02:29:14,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622144082] [2021-04-15 02:29:14,578 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 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 02:29:14,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:14,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:14,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:14,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:14,644 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:29:14,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:14,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-04-15 02:29:14,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111494698] [2021-04-15 02:29:14,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:14,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:14,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:14,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:14,645 INFO L87 Difference]: Start difference. First operand 131115 states and 396442 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 02:29:15,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:15,788 INFO L93 Difference]: Finished difference Result 132301 states and 398883 transitions. [2021-04-15 02:29:15,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:29:15,801 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 24 [2021-04-15 02:29:15,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:16,115 INFO L225 Difference]: With dead ends: 132301 [2021-04-15 02:29:16,115 INFO L226 Difference]: Without dead ends: 132286 [2021-04-15 02:29:16,116 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 191.1ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:29:16,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132286 states. [2021-04-15 02:29:18,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132286 to 131160. [2021-04-15 02:29:18,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131160 states, 131159 states have (on average 3.023116980153859) internal successors, (396509), 131159 states have internal predecessors, (396509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:18,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131160 states to 131160 states and 396509 transitions. [2021-04-15 02:29:18,595 INFO L78 Accepts]: Start accepts. Automaton has 131160 states and 396509 transitions. Word has length 24 [2021-04-15 02:29:18,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:18,596 INFO L480 AbstractCegarLoop]: Abstraction has 131160 states and 396509 transitions. [2021-04-15 02:29:18,596 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 02:29:18,596 INFO L276 IsEmpty]: Start isEmpty. Operand 131160 states and 396509 transitions. [2021-04-15 02:29:18,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:29:18,637 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:18,637 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:18,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10613,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:18,837 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:18,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:18,837 INFO L82 PathProgramCache]: Analyzing trace with hash 629585942, now seen corresponding path program 317 times [2021-04-15 02:29:18,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:18,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422864213] [2021-04-15 02:29:18,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:18,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422864213] [2021-04-15 02:29:18,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893691476] [2021-04-15 02:29:18,948 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 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 02:29:18,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:29:18,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:18,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:18,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:29:19,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:19,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-04-15 02:29:19,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059716300] [2021-04-15 02:29:19,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:19,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:19,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:19,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:19,021 INFO L87 Difference]: Start difference. First operand 131160 states and 396509 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 02:29:19,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:19,631 INFO L93 Difference]: Finished difference Result 131749 states and 397717 transitions. [2021-04-15 02:29:19,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:29:19,632 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 24 [2021-04-15 02:29:19,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:20,401 INFO L225 Difference]: With dead ends: 131749 [2021-04-15 02:29:20,401 INFO L226 Difference]: Without dead ends: 131743 [2021-04-15 02:29:20,402 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 205.0ms TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:29:20,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131743 states. [2021-04-15 02:29:22,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131743 to 131160. [2021-04-15 02:29:22,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131160 states, 131159 states have (on average 3.023109355820035) internal successors, (396508), 131159 states have internal predecessors, (396508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:23,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131160 states to 131160 states and 396508 transitions. [2021-04-15 02:29:23,043 INFO L78 Accepts]: Start accepts. Automaton has 131160 states and 396508 transitions. Word has length 24 [2021-04-15 02:29:23,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:23,043 INFO L480 AbstractCegarLoop]: Abstraction has 131160 states and 396508 transitions. [2021-04-15 02:29:23,043 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 02:29:23,044 INFO L276 IsEmpty]: Start isEmpty. Operand 131160 states and 396508 transitions. [2021-04-15 02:29:23,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:29:23,090 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:23,091 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:23,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10614 [2021-04-15 02:29:23,291 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:23,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:23,291 INFO L82 PathProgramCache]: Analyzing trace with hash -89034798, now seen corresponding path program 318 times [2021-04-15 02:29:23,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:23,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937803383] [2021-04-15 02:29:23,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 38 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:29:23,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937803383] [2021-04-15 02:29:23,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774045027] [2021-04-15 02:29:23,359 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 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 02:29:23,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:29:23,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:23,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:23,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:23,435 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:29:23,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:23,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-04-15 02:29:23,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130611585] [2021-04-15 02:29:23,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:23,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:23,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:23,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:23,436 INFO L87 Difference]: Start difference. First operand 131160 states and 396508 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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 02:29:23,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:23,934 INFO L93 Difference]: Finished difference Result 131436 states and 396919 transitions. [2021-04-15 02:29:23,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:29:23,935 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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 24 [2021-04-15 02:29:23,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:24,192 INFO L225 Difference]: With dead ends: 131436 [2021-04-15 02:29:24,193 INFO L226 Difference]: Without dead ends: 131434 [2021-04-15 02:29:24,193 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:24,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131434 states. [2021-04-15 02:29:26,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131434 to 131152. [2021-04-15 02:29:26,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131152 states, 131151 states have (on average 3.0228438974922036) internal successors, (396449), 131151 states have internal predecessors, (396449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:27,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131152 states to 131152 states and 396449 transitions. [2021-04-15 02:29:27,451 INFO L78 Accepts]: Start accepts. Automaton has 131152 states and 396449 transitions. Word has length 24 [2021-04-15 02:29:27,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:27,451 INFO L480 AbstractCegarLoop]: Abstraction has 131152 states and 396449 transitions. [2021-04-15 02:29:27,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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 02:29:27,452 INFO L276 IsEmpty]: Start isEmpty. Operand 131152 states and 396449 transitions. [2021-04-15 02:29:27,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:29:27,502 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:27,502 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:27,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10615 [2021-04-15 02:29:27,702 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:27,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:27,702 INFO L82 PathProgramCache]: Analyzing trace with hash 561470900, now seen corresponding path program 319 times [2021-04-15 02:29:27,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:27,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268963881] [2021-04-15 02:29:27,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:27,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268963881] [2021-04-15 02:29:27,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159097985] [2021-04-15 02:29:27,785 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 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 02:29:27,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:27,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:27,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:29:27,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:27,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-04-15 02:29:27,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063044921] [2021-04-15 02:29:27,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:27,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:27,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:27,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:27,852 INFO L87 Difference]: Start difference. First operand 131152 states and 396449 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 02:29:28,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:28,437 INFO L93 Difference]: Finished difference Result 131396 states and 396804 transitions. [2021-04-15 02:29:28,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:29:28,438 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 24 [2021-04-15 02:29:28,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:28,701 INFO L225 Difference]: With dead ends: 131396 [2021-04-15 02:29:28,702 INFO L226 Difference]: Without dead ends: 131393 [2021-04-15 02:29:28,702 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=214, Invalid=436, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:29:28,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131393 states. [2021-04-15 02:29:31,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131393 to 131141. [2021-04-15 02:29:31,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.0221976513649533) internal successors, (396331), 131140 states have internal predecessors, (396331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 396331 transitions. [2021-04-15 02:29:31,800 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 396331 transitions. Word has length 24 [2021-04-15 02:29:31,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:31,800 INFO L480 AbstractCegarLoop]: Abstraction has 131141 states and 396331 transitions. [2021-04-15 02:29:31,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 02:29:31,800 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 396331 transitions. [2021-04-15 02:29:31,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:29:31,854 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:31,854 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:32,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10616,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:32,075 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:32,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:32,076 INFO L82 PathProgramCache]: Analyzing trace with hash -511614480, now seen corresponding path program 320 times [2021-04-15 02:29:32,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:32,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445179483] [2021-04-15 02:29:32,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:32,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445179483] [2021-04-15 02:29:32,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905381636] [2021-04-15 02:29:32,165 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 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 02:29:32,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:32,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:32,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:32,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:29:32,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:32,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-04-15 02:29:32,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289469136] [2021-04-15 02:29:32,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:32,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:32,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:32,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:32,232 INFO L87 Difference]: Start difference. First operand 131141 states and 396331 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:29:33,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:33,470 INFO L93 Difference]: Finished difference Result 131390 states and 396692 transitions. [2021-04-15 02:29:33,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:29:33,470 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 24 [2021-04-15 02:29:33,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:33,750 INFO L225 Difference]: With dead ends: 131390 [2021-04-15 02:29:33,751 INFO L226 Difference]: Without dead ends: 131385 [2021-04-15 02:29:33,751 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 162.0ms TimeCoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:29:33,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131385 states. [2021-04-15 02:29:35,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131385 to 131141. [2021-04-15 02:29:36,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.0206191856031723) internal successors, (396124), 131140 states have internal predecessors, (396124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:36,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 396124 transitions. [2021-04-15 02:29:36,391 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 396124 transitions. Word has length 24 [2021-04-15 02:29:36,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:36,391 INFO L480 AbstractCegarLoop]: Abstraction has 131141 states and 396124 transitions. [2021-04-15 02:29:36,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:29:36,391 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 396124 transitions. [2021-04-15 02:29:36,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:29:36,436 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:36,436 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:36,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10617,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:36,637 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:36,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:36,637 INFO L82 PathProgramCache]: Analyzing trace with hash 582477108, now seen corresponding path program 321 times [2021-04-15 02:29:36,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:36,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298459615] [2021-04-15 02:29:36,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:36,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298459615] [2021-04-15 02:29:36,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958820543] [2021-04-15 02:29:36,731 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 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 02:29:36,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:29:36,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:36,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:29:36,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:36,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:36,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:29:36,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898706132] [2021-04-15 02:29:36,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:36,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:36,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:36,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:36,810 INFO L87 Difference]: Start difference. First operand 131141 states and 396124 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 02:29:37,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:37,427 INFO L93 Difference]: Finished difference Result 133913 states and 402552 transitions. [2021-04-15 02:29:37,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:29:37,428 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 24 [2021-04-15 02:29:37,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:38,262 INFO L225 Difference]: With dead ends: 133913 [2021-04-15 02:29:38,262 INFO L226 Difference]: Without dead ends: 133910 [2021-04-15 02:29:38,262 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 170.4ms TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:29:38,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133910 states. [2021-04-15 02:29:40,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133910 to 131141. [2021-04-15 02:29:40,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.020283666310813) internal successors, (396080), 131140 states have internal predecessors, (396080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:40,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 396080 transitions. [2021-04-15 02:29:40,749 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 396080 transitions. Word has length 24 [2021-04-15 02:29:40,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:40,749 INFO L480 AbstractCegarLoop]: Abstraction has 131141 states and 396080 transitions. [2021-04-15 02:29:40,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 02:29:40,749 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 396080 transitions. [2021-04-15 02:29:40,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:29:40,797 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:40,797 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:40,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10618,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:40,997 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:40,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:40,997 INFO L82 PathProgramCache]: Analyzing trace with hash 139577968, now seen corresponding path program 322 times [2021-04-15 02:29:40,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:40,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94902779] [2021-04-15 02:29:40,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:41,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94902779] [2021-04-15 02:29:41,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603922508] [2021-04-15 02:29:41,095 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 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 02:29:41,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:41,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:41,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:41,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:29:41,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:41,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-04-15 02:29:41,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459879665] [2021-04-15 02:29:41,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:41,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:41,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:41,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:41,162 INFO L87 Difference]: Start difference. First operand 131141 states and 396080 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:29:41,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:41,784 INFO L93 Difference]: Finished difference Result 132975 states and 400018 transitions. [2021-04-15 02:29:41,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:29:41,785 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 24 [2021-04-15 02:29:41,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:42,072 INFO L225 Difference]: With dead ends: 132975 [2021-04-15 02:29:42,072 INFO L226 Difference]: Without dead ends: 132971 [2021-04-15 02:29:42,072 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 172.8ms TimeCoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:29:42,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132971 states. [2021-04-15 02:29:44,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132971 to 131141. [2021-04-15 02:29:44,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.020253164556962) internal successors, (396076), 131140 states have internal predecessors, (396076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:45,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 396076 transitions. [2021-04-15 02:29:45,386 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 396076 transitions. Word has length 24 [2021-04-15 02:29:45,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:45,386 INFO L480 AbstractCegarLoop]: Abstraction has 131141 states and 396076 transitions. [2021-04-15 02:29:45,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:29:45,386 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 396076 transitions. [2021-04-15 02:29:45,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:29:45,431 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:45,431 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:45,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10619 [2021-04-15 02:29:45,631 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:45,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:45,632 INFO L82 PathProgramCache]: Analyzing trace with hash -705393484, now seen corresponding path program 323 times [2021-04-15 02:29:45,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:45,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828499900] [2021-04-15 02:29:45,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:45,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828499900] [2021-04-15 02:29:45,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195816494] [2021-04-15 02:29:45,742 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 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 02:29:45,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:29:45,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:45,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:45,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:29:45,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:45,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-04-15 02:29:45,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100991144] [2021-04-15 02:29:45,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:45,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:45,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:45,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:45,811 INFO L87 Difference]: Start difference. First operand 131141 states and 396076 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 02:29:46,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:46,424 INFO L93 Difference]: Finished difference Result 132986 states and 400023 transitions. [2021-04-15 02:29:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:29:46,424 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 24 [2021-04-15 02:29:46,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:46,696 INFO L225 Difference]: With dead ends: 132986 [2021-04-15 02:29:46,696 INFO L226 Difference]: Without dead ends: 132971 [2021-04-15 02:29:46,696 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 195.7ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:29:46,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132971 states. [2021-04-15 02:29:49,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132971 to 131201. [2021-04-15 02:29:49,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131201 states, 131200 states have (on average 3.0197713414634144) internal successors, (396194), 131200 states have internal predecessors, (396194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131201 states to 131201 states and 396194 transitions. [2021-04-15 02:29:49,865 INFO L78 Accepts]: Start accepts. Automaton has 131201 states and 396194 transitions. Word has length 24 [2021-04-15 02:29:49,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:49,865 INFO L480 AbstractCegarLoop]: Abstraction has 131201 states and 396194 transitions. [2021-04-15 02:29:49,865 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 02:29:49,865 INFO L276 IsEmpty]: Start isEmpty. Operand 131201 states and 396194 transitions. [2021-04-15 02:29:49,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:29:49,953 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:49,953 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:50,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10620,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:50,169 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:50,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:50,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1129704720, now seen corresponding path program 324 times [2021-04-15 02:29:50,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:50,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064071941] [2021-04-15 02:29:50,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:50,285 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:50,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064071941] [2021-04-15 02:29:50,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306147828] [2021-04-15 02:29:50,285 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 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 02:29:50,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:29:50,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:50,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:29:50,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:50,356 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:50,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:50,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-04-15 02:29:50,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859391430] [2021-04-15 02:29:50,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:50,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:50,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:50,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:50,357 INFO L87 Difference]: Start difference. First operand 131201 states and 396194 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 02:29:51,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:51,007 INFO L93 Difference]: Finished difference Result 131929 states and 397683 transitions. [2021-04-15 02:29:51,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:29:51,008 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 24 [2021-04-15 02:29:51,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:51,269 INFO L225 Difference]: With dead ends: 131929 [2021-04-15 02:29:51,269 INFO L226 Difference]: Without dead ends: 131923 [2021-04-15 02:29:51,270 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 210.2ms TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:29:51,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131923 states. [2021-04-15 02:29:53,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131923 to 131201. [2021-04-15 02:29:53,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131201 states, 131200 states have (on average 3.019763719512195) internal successors, (396193), 131200 states have internal predecessors, (396193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:54,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131201 states to 131201 states and 396193 transitions. [2021-04-15 02:29:54,052 INFO L78 Accepts]: Start accepts. Automaton has 131201 states and 396193 transitions. Word has length 24 [2021-04-15 02:29:54,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:54,052 INFO L480 AbstractCegarLoop]: Abstraction has 131201 states and 396193 transitions. [2021-04-15 02:29:54,052 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 02:29:54,052 INFO L276 IsEmpty]: Start isEmpty. Operand 131201 states and 396193 transitions. [2021-04-15 02:29:54,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:29:54,099 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:54,099 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:54,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10621 [2021-04-15 02:29:54,299 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:54,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:54,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1398451148, now seen corresponding path program 325 times [2021-04-15 02:29:54,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:54,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774541934] [2021-04-15 02:29:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:54,421 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:54,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774541934] [2021-04-15 02:29:54,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286287485] [2021-04-15 02:29:54,421 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 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 02:29:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:54,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:54,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:29:54,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:54,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-04-15 02:29:54,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696622966] [2021-04-15 02:29:54,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:29:54,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:54,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:29:54,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:54,908 INFO L87 Difference]: Start difference. First operand 131201 states and 396193 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 02:29:55,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:55,581 INFO L93 Difference]: Finished difference Result 131858 states and 397549 transitions. [2021-04-15 02:29:55,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:29:55,581 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 24 [2021-04-15 02:29:55,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:55,850 INFO L225 Difference]: With dead ends: 131858 [2021-04-15 02:29:55,850 INFO L226 Difference]: Without dead ends: 131851 [2021-04-15 02:29:55,850 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 234.9ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:29:55,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131851 states. [2021-04-15 02:29:58,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131851 to 131201. [2021-04-15 02:29:58,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131201 states, 131200 states have (on average 3.0197560975609754) internal successors, (396192), 131200 states have internal predecessors, (396192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:58,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131201 states to 131201 states and 396192 transitions. [2021-04-15 02:29:58,540 INFO L78 Accepts]: Start accepts. Automaton has 131201 states and 396192 transitions. Word has length 24 [2021-04-15 02:29:58,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:58,540 INFO L480 AbstractCegarLoop]: Abstraction has 131201 states and 396192 transitions. [2021-04-15 02:29:58,540 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 02:29:58,540 INFO L276 IsEmpty]: Start isEmpty. Operand 131201 states and 396192 transitions. [2021-04-15 02:29:58,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:29:58,585 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:58,585 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:58,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10622 [2021-04-15 02:29:58,785 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:58,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:58,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1057585994, now seen corresponding path program 326 times [2021-04-15 02:29:58,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:58,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676531078] [2021-04-15 02:29:58,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:58,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:58,876 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:58,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676531078] [2021-04-15 02:29:58,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469792596] [2021-04-15 02:29:58,877 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 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 02:29:58,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:58,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:58,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:29:58,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 61 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:29:58,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:58,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:29:58,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720743560] [2021-04-15 02:29:58,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:58,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:58,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:58,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:58,956 INFO L87 Difference]: Start difference. First operand 131201 states and 396192 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:30:00,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:00,077 INFO L93 Difference]: Finished difference Result 131376 states and 396488 transitions. [2021-04-15 02:30:00,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:30:00,077 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 24 [2021-04-15 02:30:00,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:00,353 INFO L225 Difference]: With dead ends: 131376 [2021-04-15 02:30:00,353 INFO L226 Difference]: Without dead ends: 131372 [2021-04-15 02:30:00,354 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=214, Invalid=386, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:30:00,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131372 states. [2021-04-15 02:30:02,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131372 to 131153. [2021-04-15 02:30:02,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131153 states, 131152 states have (on average 3.0198014517506406) internal successors, (396053), 131152 states have internal predecessors, (396053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:03,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131153 states to 131153 states and 396053 transitions. [2021-04-15 02:30:03,152 INFO L78 Accepts]: Start accepts. Automaton has 131153 states and 396053 transitions. Word has length 24 [2021-04-15 02:30:03,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:03,152 INFO L480 AbstractCegarLoop]: Abstraction has 131153 states and 396053 transitions. [2021-04-15 02:30:03,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 02:30:03,152 INFO L276 IsEmpty]: Start isEmpty. Operand 131153 states and 396053 transitions. [2021-04-15 02:30:03,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:30:03,206 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:03,206 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:03,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10623,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:03,407 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:03,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:03,407 INFO L82 PathProgramCache]: Analyzing trace with hash 257571116, now seen corresponding path program 327 times [2021-04-15 02:30:03,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:03,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673223451] [2021-04-15 02:30:03,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:03,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673223451] [2021-04-15 02:30:03,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990663710] [2021-04-15 02:30:03,501 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 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 02:30:03,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:30:03,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:03,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:30:03,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:03,575 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 27 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:30:03,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:03,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:30:03,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504416819] [2021-04-15 02:30:03,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:30:03,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:03,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:30:03,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:30:03,576 INFO L87 Difference]: Start difference. First operand 131153 states and 396053 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 02:30:04,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:04,798 INFO L93 Difference]: Finished difference Result 131624 states and 397009 transitions. [2021-04-15 02:30:04,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:30:04,799 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 24 [2021-04-15 02:30:04,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:05,117 INFO L225 Difference]: With dead ends: 131624 [2021-04-15 02:30:05,117 INFO L226 Difference]: Without dead ends: 131621 [2021-04-15 02:30:05,117 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 160.9ms TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:30:05,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131621 states. [2021-04-15 02:30:07,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131621 to 131141. [2021-04-15 02:30:07,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.0196278786030195) internal successors, (395994), 131140 states have internal predecessors, (395994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:07,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 395994 transitions. [2021-04-15 02:30:07,745 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 395994 transitions. Word has length 24 [2021-04-15 02:30:07,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:07,745 INFO L480 AbstractCegarLoop]: Abstraction has 131141 states and 395994 transitions. [2021-04-15 02:30:07,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 02:30:07,745 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 395994 transitions. [2021-04-15 02:30:07,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:30:07,788 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:07,788 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:07,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10624 [2021-04-15 02:30:07,988 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:07,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:07,989 INFO L82 PathProgramCache]: Analyzing trace with hash -185328024, now seen corresponding path program 328 times [2021-04-15 02:30:07,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:07,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848588942] [2021-04-15 02:30:07,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:07,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:08,084 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:08,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848588942] [2021-04-15 02:30:08,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910061402] [2021-04-15 02:30:08,084 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 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 02:30:08,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:08,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:08,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:08,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 39 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:30:08,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:08,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-04-15 02:30:08,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071507193] [2021-04-15 02:30:08,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:30:08,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:08,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:30:08,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:30:08,153 INFO L87 Difference]: Start difference. First operand 131141 states and 395994 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 02:30:08,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:08,802 INFO L93 Difference]: Finished difference Result 131617 states and 396954 transitions. [2021-04-15 02:30:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:30:08,803 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 24 [2021-04-15 02:30:08,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:09,654 INFO L225 Difference]: With dead ends: 131617 [2021-04-15 02:30:09,654 INFO L226 Difference]: Without dead ends: 131609 [2021-04-15 02:30:09,654 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:30:09,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131609 states. [2021-04-15 02:30:11,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131609 to 131143. [2021-04-15 02:30:11,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131143 states, 131142 states have (on average 3.01929969041192) internal successors, (395957), 131142 states have internal predecessors, (395957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:12,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131143 states to 131143 states and 395957 transitions. [2021-04-15 02:30:12,299 INFO L78 Accepts]: Start accepts. Automaton has 131143 states and 395957 transitions. Word has length 24 [2021-04-15 02:30:12,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:12,299 INFO L480 AbstractCegarLoop]: Abstraction has 131143 states and 395957 transitions. [2021-04-15 02:30:12,299 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 02:30:12,299 INFO L276 IsEmpty]: Start isEmpty. Operand 131143 states and 395957 transitions. [2021-04-15 02:30:12,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:30:12,347 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:12,347 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:12,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10625,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:12,547 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:12,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:12,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1030299476, now seen corresponding path program 329 times [2021-04-15 02:30:12,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:12,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419321822] [2021-04-15 02:30:12,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:12,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419321822] [2021-04-15 02:30:12,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283878176] [2021-04-15 02:30:12,647 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 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 02:30:12,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:30:12,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:12,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:12,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:30:12,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:12,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-04-15 02:30:12,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835516117] [2021-04-15 02:30:12,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:30:12,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:12,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:30:12,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:30:12,738 INFO L87 Difference]: Start difference. First operand 131143 states and 395957 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 02:30:13,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:13,416 INFO L93 Difference]: Finished difference Result 131841 states and 397374 transitions. [2021-04-15 02:30:13,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:30:13,417 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 24 [2021-04-15 02:30:13,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:13,706 INFO L225 Difference]: With dead ends: 131841 [2021-04-15 02:30:13,706 INFO L226 Difference]: Without dead ends: 131836 [2021-04-15 02:30:13,707 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 204.2ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:30:13,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131836 states. [2021-04-15 02:30:16,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131836 to 131145. [2021-04-15 02:30:16,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131145 states, 131144 states have (on average 3.0192765204660525) internal successors, (395960), 131144 states have internal predecessors, (395960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:17,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131145 states to 131145 states and 395960 transitions. [2021-04-15 02:30:17,075 INFO L78 Accepts]: Start accepts. Automaton has 131145 states and 395960 transitions. Word has length 24 [2021-04-15 02:30:17,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:17,075 INFO L480 AbstractCegarLoop]: Abstraction has 131145 states and 395960 transitions. [2021-04-15 02:30:17,075 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 02:30:17,075 INFO L276 IsEmpty]: Start isEmpty. Operand 131145 states and 395960 transitions. [2021-04-15 02:30:17,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:30:17,122 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:17,122 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:17,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10626 [2021-04-15 02:30:17,323 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:17,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:17,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1454610712, now seen corresponding path program 330 times [2021-04-15 02:30:17,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:17,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98455348] [2021-04-15 02:30:17,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:17,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98455348] [2021-04-15 02:30:17,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639897306] [2021-04-15 02:30:17,434 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 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 02:30:17,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:30:17,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:17,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:30:17,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:17,508 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:17,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:17,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:30:17,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227842374] [2021-04-15 02:30:17,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:30:17,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:17,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:30:17,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:30:17,509 INFO L87 Difference]: Start difference. First operand 131145 states and 395960 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 02:30:18,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:18,119 INFO L93 Difference]: Finished difference Result 131823 states and 397349 transitions. [2021-04-15 02:30:18,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:30:18,119 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 24 [2021-04-15 02:30:18,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:18,364 INFO L225 Difference]: With dead ends: 131823 [2021-04-15 02:30:18,365 INFO L226 Difference]: Without dead ends: 131817 [2021-04-15 02:30:18,365 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 213.0ms TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:30:18,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131817 states. [2021-04-15 02:30:20,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131817 to 131145. [2021-04-15 02:30:20,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131145 states, 131144 states have (on average 3.019253644848411) internal successors, (395957), 131144 states have internal predecessors, (395957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:21,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131145 states to 131145 states and 395957 transitions. [2021-04-15 02:30:21,163 INFO L78 Accepts]: Start accepts. Automaton has 131145 states and 395957 transitions. Word has length 24 [2021-04-15 02:30:21,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:21,163 INFO L480 AbstractCegarLoop]: Abstraction has 131145 states and 395957 transitions. [2021-04-15 02:30:21,163 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 02:30:21,163 INFO L276 IsEmpty]: Start isEmpty. Operand 131145 states and 395957 transitions. [2021-04-15 02:30:21,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:30:21,633 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:21,633 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:21,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10627,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:21,833 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:21,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:21,834 INFO L82 PathProgramCache]: Analyzing trace with hash 266264850, now seen corresponding path program 331 times [2021-04-15 02:30:21,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:21,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429585956] [2021-04-15 02:30:21,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:21,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429585956] [2021-04-15 02:30:21,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71680834] [2021-04-15 02:30:21,941 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 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 02:30:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:21,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:21,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:30:22,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:22,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-04-15 02:30:22,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994935492] [2021-04-15 02:30:22,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:30:22,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:22,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:30:22,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:30:22,010 INFO L87 Difference]: Start difference. First operand 131145 states and 395957 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 02:30:22,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:22,666 INFO L93 Difference]: Finished difference Result 131611 states and 396867 transitions. [2021-04-15 02:30:22,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:30:22,666 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 24 [2021-04-15 02:30:22,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:22,951 INFO L225 Difference]: With dead ends: 131611 [2021-04-15 02:30:22,951 INFO L226 Difference]: Without dead ends: 131596 [2021-04-15 02:30:22,951 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:30:23,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131596 states. [2021-04-15 02:30:25,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131596 to 131179. [2021-04-15 02:30:25,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131179 states, 131178 states have (on average 3.0187988839592004) internal successors, (396000), 131178 states have internal predecessors, (396000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:25,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131179 states to 131179 states and 396000 transitions. [2021-04-15 02:30:25,751 INFO L78 Accepts]: Start accepts. Automaton has 131179 states and 396000 transitions. Word has length 24 [2021-04-15 02:30:25,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:25,751 INFO L480 AbstractCegarLoop]: Abstraction has 131179 states and 396000 transitions. [2021-04-15 02:30:25,751 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 02:30:25,751 INFO L276 IsEmpty]: Start isEmpty. Operand 131179 states and 396000 transitions. [2021-04-15 02:30:25,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:30:25,795 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:25,795 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:25,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10628,333 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:25,995 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:25,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:25,996 INFO L82 PathProgramCache]: Analyzing trace with hash -158046386, now seen corresponding path program 332 times [2021-04-15 02:30:25,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:25,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272877037] [2021-04-15 02:30:25,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:26,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272877037] [2021-04-15 02:30:26,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173837691] [2021-04-15 02:30:26,105 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 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 02:30:26,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:26,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:26,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:26,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:30:26,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:26,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-04-15 02:30:26,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298192122] [2021-04-15 02:30:26,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:30:26,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:26,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:30:26,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:30:26,172 INFO L87 Difference]: Start difference. First operand 131179 states and 396000 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 02:30:27,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:27,380 INFO L93 Difference]: Finished difference Result 132080 states and 397867 transitions. [2021-04-15 02:30:27,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:30:27,381 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 24 [2021-04-15 02:30:27,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:27,640 INFO L225 Difference]: With dead ends: 132080 [2021-04-15 02:30:27,640 INFO L226 Difference]: Without dead ends: 132074 [2021-04-15 02:30:27,640 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 242.6ms TimeCoverageRelationStatistics Valid=324, Invalid=732, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:30:27,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132074 states. [2021-04-15 02:30:30,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132074 to 131189. [2021-04-15 02:30:30,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131189 states, 131188 states have (on average 3.018713601853828) internal successors, (396019), 131188 states have internal predecessors, (396019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:30,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131189 states to 131189 states and 396019 transitions. [2021-04-15 02:30:30,705 INFO L78 Accepts]: Start accepts. Automaton has 131189 states and 396019 transitions. Word has length 24 [2021-04-15 02:30:30,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:30,705 INFO L480 AbstractCegarLoop]: Abstraction has 131189 states and 396019 transitions. [2021-04-15 02:30:30,705 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 02:30:30,705 INFO L276 IsEmpty]: Start isEmpty. Operand 131189 states and 396019 transitions. [2021-04-15 02:30:30,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:30:30,765 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:30,765 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:30,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10629,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:30,965 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:30,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:30,966 INFO L82 PathProgramCache]: Analyzing trace with hash -205155220, now seen corresponding path program 333 times [2021-04-15 02:30:30,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:30,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645987367] [2021-04-15 02:30:30,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:31,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645987367] [2021-04-15 02:30:31,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219354613] [2021-04-15 02:30:31,065 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 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 02:30:31,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:30:31,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:31,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:30:31,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:31,139 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:31,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:31,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:30:31,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478760831] [2021-04-15 02:30:31,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:30:31,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:31,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:30:31,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:30:31,140 INFO L87 Difference]: Start difference. First operand 131189 states and 396019 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 02:30:32,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:32,367 INFO L93 Difference]: Finished difference Result 131602 states and 396804 transitions. [2021-04-15 02:30:32,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:30:32,368 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 24 [2021-04-15 02:30:32,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:32,656 INFO L225 Difference]: With dead ends: 131602 [2021-04-15 02:30:32,656 INFO L226 Difference]: Without dead ends: 131599 [2021-04-15 02:30:32,657 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 169.7ms TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:30:32,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131599 states. [2021-04-15 02:30:34,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131599 to 131169. [2021-04-15 02:30:34,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131169 states, 131168 states have (on average 3.0181675408636255) internal successors, (395887), 131168 states have internal predecessors, (395887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:35,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131169 states to 131169 states and 395887 transitions. [2021-04-15 02:30:35,311 INFO L78 Accepts]: Start accepts. Automaton has 131169 states and 395887 transitions. Word has length 24 [2021-04-15 02:30:35,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:35,311 INFO L480 AbstractCegarLoop]: Abstraction has 131169 states and 395887 transitions. [2021-04-15 02:30:35,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 02:30:35,311 INFO L276 IsEmpty]: Start isEmpty. Operand 131169 states and 395887 transitions. [2021-04-15 02:30:35,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:30:35,357 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:35,357 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:35,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10630 [2021-04-15 02:30:35,557 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:35,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:35,557 INFO L82 PathProgramCache]: Analyzing trace with hash -648054360, now seen corresponding path program 334 times [2021-04-15 02:30:35,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:35,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002372560] [2021-04-15 02:30:35,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:35,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:35,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002372560] [2021-04-15 02:30:35,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766524488] [2021-04-15 02:30:35,653 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 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 02:30:35,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:35,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:35,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:35,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:30:35,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:35,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-04-15 02:30:35,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356038468] [2021-04-15 02:30:35,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:30:35,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:35,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:30:35,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:30:35,733 INFO L87 Difference]: Start difference. First operand 131169 states and 395887 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:30:36,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:36,927 INFO L93 Difference]: Finished difference Result 132909 states and 399521 transitions. [2021-04-15 02:30:36,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:30:36,941 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 24 [2021-04-15 02:30:36,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:37,213 INFO L225 Difference]: With dead ends: 132909 [2021-04-15 02:30:37,213 INFO L226 Difference]: Without dead ends: 132901 [2021-04-15 02:30:37,213 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:30:37,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132901 states. [2021-04-15 02:30:39,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132901 to 131188. [2021-04-15 02:30:39,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131188 states, 131187 states have (on average 3.0180734371545963) internal successors, (395932), 131187 states have internal predecessors, (395932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131188 states to 131188 states and 395932 transitions. [2021-04-15 02:30:39,725 INFO L78 Accepts]: Start accepts. Automaton has 131188 states and 395932 transitions. Word has length 24 [2021-04-15 02:30:39,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:39,725 INFO L480 AbstractCegarLoop]: Abstraction has 131188 states and 395932 transitions. [2021-04-15 02:30:39,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:30:39,726 INFO L276 IsEmpty]: Start isEmpty. Operand 131188 states and 395932 transitions. [2021-04-15 02:30:39,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:30:39,774 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:39,775 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:39,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10631,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:39,975 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:39,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:39,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1493025812, now seen corresponding path program 335 times [2021-04-15 02:30:39,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:39,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666919375] [2021-04-15 02:30:39,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:40,088 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:40,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666919375] [2021-04-15 02:30:40,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832897014] [2021-04-15 02:30:40,088 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 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 02:30:40,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:30:40,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:40,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:40,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:30:40,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:40,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-04-15 02:30:40,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615612958] [2021-04-15 02:30:40,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:30:40,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:40,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:30:40,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:30:40,160 INFO L87 Difference]: Start difference. First operand 131188 states and 395932 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 02:30:40,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:40,788 INFO L93 Difference]: Finished difference Result 132917 states and 399522 transitions. [2021-04-15 02:30:40,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:30:40,788 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 24 [2021-04-15 02:30:40,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:41,063 INFO L225 Difference]: With dead ends: 132917 [2021-04-15 02:30:41,063 INFO L226 Difference]: Without dead ends: 132902 [2021-04-15 02:30:41,063 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 204.3ms TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:30:41,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132902 states. [2021-04-15 02:30:43,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132902 to 131226. [2021-04-15 02:30:43,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131226 states, 131225 states have (on average 3.017854829491332) internal successors, (396018), 131225 states have internal predecessors, (396018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131226 states to 131226 states and 396018 transitions. [2021-04-15 02:30:44,326 INFO L78 Accepts]: Start accepts. Automaton has 131226 states and 396018 transitions. Word has length 24 [2021-04-15 02:30:44,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:44,326 INFO L480 AbstractCegarLoop]: Abstraction has 131226 states and 396018 transitions. [2021-04-15 02:30:44,326 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 02:30:44,326 INFO L276 IsEmpty]: Start isEmpty. Operand 131226 states and 396018 transitions. [2021-04-15 02:30:44,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:30:44,370 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:44,370 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:44,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10632 [2021-04-15 02:30:44,570 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:44,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:44,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1917337048, now seen corresponding path program 336 times [2021-04-15 02:30:44,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:44,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157971730] [2021-04-15 02:30:44,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:44,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157971730] [2021-04-15 02:30:44,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899725735] [2021-04-15 02:30:44,714 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 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 02:30:44,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:30:44,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:44,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:30:44,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:44,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:44,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-04-15 02:30:44,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426252879] [2021-04-15 02:30:44,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:30:44,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:44,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:30:44,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:30:44,788 INFO L87 Difference]: Start difference. First operand 131226 states and 396018 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 02:30:45,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:45,455 INFO L93 Difference]: Finished difference Result 132184 states and 397974 transitions. [2021-04-15 02:30:45,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:30:45,456 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 24 [2021-04-15 02:30:45,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:45,730 INFO L225 Difference]: With dead ends: 132184 [2021-04-15 02:30:45,730 INFO L226 Difference]: Without dead ends: 132172 [2021-04-15 02:30:45,730 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 227.8ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:30:45,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132172 states. [2021-04-15 02:30:48,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132172 to 131230. [2021-04-15 02:30:48,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131230 states, 131229 states have (on average 3.0178390447233463) internal successors, (396028), 131229 states have internal predecessors, (396028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:48,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131230 states to 131230 states and 396028 transitions. [2021-04-15 02:30:48,898 INFO L78 Accepts]: Start accepts. Automaton has 131230 states and 396028 transitions. Word has length 24 [2021-04-15 02:30:48,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:48,898 INFO L480 AbstractCegarLoop]: Abstraction has 131230 states and 396028 transitions. [2021-04-15 02:30:48,898 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 02:30:48,899 INFO L276 IsEmpty]: Start isEmpty. Operand 131230 states and 396028 transitions. [2021-04-15 02:30:48,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:30:48,941 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:48,941 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:49,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10633 [2021-04-15 02:30:49,142 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:49,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:49,142 INFO L82 PathProgramCache]: Analyzing trace with hash 2108883820, now seen corresponding path program 337 times [2021-04-15 02:30:49,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:49,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558689515] [2021-04-15 02:30:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:49,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558689515] [2021-04-15 02:30:49,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923383907] [2021-04-15 02:30:49,259 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 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 02:30:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:49,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:49,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:30:49,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:49,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-04-15 02:30:49,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020264702] [2021-04-15 02:30:49,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:30:49,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:49,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:30:49,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:30:49,327 INFO L87 Difference]: Start difference. First operand 131230 states and 396028 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 02:30:49,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:49,950 INFO L93 Difference]: Finished difference Result 132077 states and 397760 transitions. [2021-04-15 02:30:49,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:30:49,951 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 24 [2021-04-15 02:30:49,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:50,224 INFO L225 Difference]: With dead ends: 132077 [2021-04-15 02:30:50,224 INFO L226 Difference]: Without dead ends: 132063 [2021-04-15 02:30:50,224 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 214.8ms TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:30:50,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132063 states. [2021-04-15 02:30:52,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132063 to 131230. [2021-04-15 02:30:52,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131230 states, 131229 states have (on average 3.017823804189623) internal successors, (396026), 131229 states have internal predecessors, (396026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:53,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131230 states to 131230 states and 396026 transitions. [2021-04-15 02:30:53,011 INFO L78 Accepts]: Start accepts. Automaton has 131230 states and 396026 transitions. Word has length 24 [2021-04-15 02:30:53,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:53,011 INFO L480 AbstractCegarLoop]: Abstraction has 131230 states and 396026 transitions. [2021-04-15 02:30:53,011 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 02:30:53,011 INFO L276 IsEmpty]: Start isEmpty. Operand 131230 states and 396026 transitions. [2021-04-15 02:30:53,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:30:53,057 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:53,057 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:53,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10634 [2021-04-15 02:30:53,258 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:53,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:53,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1156481466, now seen corresponding path program 338 times [2021-04-15 02:30:53,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:53,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147658840] [2021-04-15 02:30:53,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:53,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147658840] [2021-04-15 02:30:53,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653636195] [2021-04-15 02:30:53,760 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 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:30:53,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:53,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:53,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:30:53,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:30:53,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:53,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:30:53,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782268858] [2021-04-15 02:30:53,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:30:53,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:53,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:30:53,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:30:53,915 INFO L87 Difference]: Start difference. First operand 131230 states and 396026 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 02:30:54,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:54,443 INFO L93 Difference]: Finished difference Result 131537 states and 396519 transitions. [2021-04-15 02:30:54,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:30:54,444 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 24 [2021-04-15 02:30:54,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:54,718 INFO L225 Difference]: With dead ends: 131537 [2021-04-15 02:30:54,718 INFO L226 Difference]: Without dead ends: 131537 [2021-04-15 02:30:54,718 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 530.3ms TimeCoverageRelationStatistics Valid=148, Invalid=232, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:30:54,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131537 states. [2021-04-15 02:30:57,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131537 to 131150. [2021-04-15 02:30:57,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131150 states, 131149 states have (on average 3.018078673874753) internal successors, (395818), 131149 states have internal predecessors, (395818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:57,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131150 states to 131150 states and 395818 transitions. [2021-04-15 02:30:57,466 INFO L78 Accepts]: Start accepts. Automaton has 131150 states and 395818 transitions. Word has length 24 [2021-04-15 02:30:57,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:57,466 INFO L480 AbstractCegarLoop]: Abstraction has 131150 states and 395818 transitions. [2021-04-15 02:30:57,466 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 02:30:57,466 INFO L276 IsEmpty]: Start isEmpty. Operand 131150 states and 395818 transitions. [2021-04-15 02:30:57,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:30:57,509 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:57,509 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:57,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10635 [2021-04-15 02:30:57,710 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:57,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:57,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1380742056, now seen corresponding path program 339 times [2021-04-15 02:30:57,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:57,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88159444] [2021-04-15 02:30:57,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:57,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88159444] [2021-04-15 02:30:57,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712985292] [2021-04-15 02:30:57,822 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 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 02:30:57,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:30:57,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:57,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:30:57,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:57,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:57,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-04-15 02:30:57,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287701024] [2021-04-15 02:30:57,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:30:57,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:57,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:30:57,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:30:57,906 INFO L87 Difference]: Start difference. First operand 131150 states and 395818 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 02:30:59,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:59,073 INFO L93 Difference]: Finished difference Result 131545 states and 396600 transitions. [2021-04-15 02:30:59,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:30:59,074 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 24 [2021-04-15 02:30:59,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:59,318 INFO L225 Difference]: With dead ends: 131545 [2021-04-15 02:30:59,319 INFO L226 Difference]: Without dead ends: 131527 [2021-04-15 02:30:59,319 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=305, Invalid=687, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:30:59,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131527 states. [2021-04-15 02:31:01,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131527 to 131140. [2021-04-15 02:31:01,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131140 states, 131139 states have (on average 3.0178284110752713) internal successors, (395755), 131139 states have internal predecessors, (395755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:01,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131140 states to 131140 states and 395755 transitions. [2021-04-15 02:31:01,978 INFO L78 Accepts]: Start accepts. Automaton has 131140 states and 395755 transitions. Word has length 24 [2021-04-15 02:31:01,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:01,978 INFO L480 AbstractCegarLoop]: Abstraction has 131140 states and 395755 transitions. [2021-04-15 02:31:01,978 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 02:31:01,978 INFO L276 IsEmpty]: Start isEmpty. Operand 131140 states and 395755 transitions. [2021-04-15 02:31:02,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:31:02,020 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:02,020 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:02,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10636,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:02,220 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:02,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:02,220 INFO L82 PathProgramCache]: Analyzing trace with hash -378548606, now seen corresponding path program 340 times [2021-04-15 02:31:02,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:02,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650599300] [2021-04-15 02:31:02,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:02,332 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:02,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650599300] [2021-04-15 02:31:02,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030134560] [2021-04-15 02:31:02,333 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 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 02:31:02,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:02,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:02,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:02,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:31:02,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:02,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2021-04-15 02:31:02,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980952903] [2021-04-15 02:31:02,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:31:02,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:02,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:31:02,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:31:02,408 INFO L87 Difference]: Start difference. First operand 131140 states and 395755 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 02:31:03,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:03,628 INFO L93 Difference]: Finished difference Result 132843 states and 399256 transitions. [2021-04-15 02:31:03,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:31:03,629 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 24 [2021-04-15 02:31:03,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:03,893 INFO L225 Difference]: With dead ends: 132843 [2021-04-15 02:31:03,894 INFO L226 Difference]: Without dead ends: 132825 [2021-04-15 02:31:03,894 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 216.2ms TimeCoverageRelationStatistics Valid=305, Invalid=687, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:31:03,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132825 states. [2021-04-15 02:31:06,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132825 to 131194. [2021-04-15 02:31:06,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131194 states, 131193 states have (on average 3.017317997149238) internal successors, (395851), 131193 states have internal predecessors, (395851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:06,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131194 states to 131194 states and 395851 transitions. [2021-04-15 02:31:06,454 INFO L78 Accepts]: Start accepts. Automaton has 131194 states and 395851 transitions. Word has length 24 [2021-04-15 02:31:06,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:06,454 INFO L480 AbstractCegarLoop]: Abstraction has 131194 states and 395851 transitions. [2021-04-15 02:31:06,455 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 02:31:06,455 INFO L276 IsEmpty]: Start isEmpty. Operand 131194 states and 395851 transitions. [2021-04-15 02:31:06,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:31:06,496 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:06,497 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:06,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10637,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:06,697 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:06,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:06,697 INFO L82 PathProgramCache]: Analyzing trace with hash -647295034, now seen corresponding path program 341 times [2021-04-15 02:31:06,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:06,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265509032] [2021-04-15 02:31:06,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:06,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265509032] [2021-04-15 02:31:06,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648662139] [2021-04-15 02:31:06,817 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 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 02:31:06,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:31:06,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:06,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:06,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:06,895 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:31:06,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:06,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2021-04-15 02:31:06,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27021677] [2021-04-15 02:31:06,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:31:06,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:06,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:31:06,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:31:06,896 INFO L87 Difference]: Start difference. First operand 131194 states and 395851 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 02:31:08,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:08,126 INFO L93 Difference]: Finished difference Result 132117 states and 397738 transitions. [2021-04-15 02:31:08,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:31:08,126 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 24 [2021-04-15 02:31:08,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:08,368 INFO L225 Difference]: With dead ends: 132117 [2021-04-15 02:31:08,368 INFO L226 Difference]: Without dead ends: 132103 [2021-04-15 02:31:08,369 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 243.8ms TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:31:08,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132103 states. [2021-04-15 02:31:10,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132103 to 131192. [2021-04-15 02:31:10,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131192 states, 131191 states have (on average 3.0173182611612077) internal successors, (395845), 131191 states have internal predecessors, (395845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:10,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131192 states to 131192 states and 395845 transitions. [2021-04-15 02:31:10,763 INFO L78 Accepts]: Start accepts. Automaton has 131192 states and 395845 transitions. Word has length 24 [2021-04-15 02:31:10,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:10,763 INFO L480 AbstractCegarLoop]: Abstraction has 131192 states and 395845 transitions. [2021-04-15 02:31:10,763 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 02:31:10,763 INFO L276 IsEmpty]: Start isEmpty. Operand 131192 states and 395845 transitions. [2021-04-15 02:31:10,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:31:10,805 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:10,805 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:11,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10638,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:11,005 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:11,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:11,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1958685642, now seen corresponding path program 342 times [2021-04-15 02:31:11,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:11,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796954734] [2021-04-15 02:31:11,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:11,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796954734] [2021-04-15 02:31:11,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636560498] [2021-04-15 02:31:11,073 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 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 02:31:11,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:31:11,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:11,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:11,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:31:11,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:11,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-04-15 02:31:11,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771325765] [2021-04-15 02:31:11,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:31:11,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:11,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:31:11,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:31:11,149 INFO L87 Difference]: Start difference. First operand 131192 states and 395845 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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 02:31:11,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:11,649 INFO L93 Difference]: Finished difference Result 131572 states and 396467 transitions. [2021-04-15 02:31:11,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:31:11,649 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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 24 [2021-04-15 02:31:11,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:11,900 INFO L225 Difference]: With dead ends: 131572 [2021-04-15 02:31:11,900 INFO L226 Difference]: Without dead ends: 131572 [2021-04-15 02:31:11,900 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:31:12,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131572 states. [2021-04-15 02:31:14,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131572 to 131222. [2021-04-15 02:31:14,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131222 states, 131221 states have (on average 3.017291439632376) internal successors, (395932), 131221 states have internal predecessors, (395932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:15,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131222 states to 131222 states and 395932 transitions. [2021-04-15 02:31:15,090 INFO L78 Accepts]: Start accepts. Automaton has 131222 states and 395932 transitions. Word has length 24 [2021-04-15 02:31:15,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:15,090 INFO L480 AbstractCegarLoop]: Abstraction has 131222 states and 395932 transitions. [2021-04-15 02:31:15,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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 02:31:15,090 INFO L276 IsEmpty]: Start isEmpty. Operand 131222 states and 395932 transitions. [2021-04-15 02:31:15,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:31:15,131 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:15,131 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:15,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10639,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:15,332 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:15,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:15,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1685775956, now seen corresponding path program 343 times [2021-04-15 02:31:15,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:15,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421117081] [2021-04-15 02:31:15,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:15,412 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 38 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:15,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421117081] [2021-04-15 02:31:15,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009398505] [2021-04-15 02:31:15,412 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 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 02:31:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:15,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:15,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:31:15,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:15,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-04-15 02:31:15,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605801426] [2021-04-15 02:31:15,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:31:15,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:15,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:31:15,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:31:15,480 INFO L87 Difference]: Start difference. First operand 131222 states and 395932 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 02:31:16,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:16,088 INFO L93 Difference]: Finished difference Result 131499 states and 396327 transitions. [2021-04-15 02:31:16,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:31:16,089 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 24 [2021-04-15 02:31:16,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:16,335 INFO L225 Difference]: With dead ends: 131499 [2021-04-15 02:31:16,335 INFO L226 Difference]: Without dead ends: 131496 [2021-04-15 02:31:16,335 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 150.8ms TimeCoverageRelationStatistics Valid=215, Invalid=435, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:31:16,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131496 states. [2021-04-15 02:31:18,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131496 to 131222. [2021-04-15 02:31:18,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131222 states, 131221 states have (on average 3.0170704384206797) internal successors, (395903), 131221 states have internal predecessors, (395903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:19,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131222 states to 131222 states and 395903 transitions. [2021-04-15 02:31:19,564 INFO L78 Accepts]: Start accepts. Automaton has 131222 states and 395903 transitions. Word has length 24 [2021-04-15 02:31:19,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:19,564 INFO L480 AbstractCegarLoop]: Abstraction has 131222 states and 395903 transitions. [2021-04-15 02:31:19,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 02:31:19,565 INFO L276 IsEmpty]: Start isEmpty. Operand 131222 states and 395903 transitions. [2021-04-15 02:31:19,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:31:19,606 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:19,607 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:19,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10640 [2021-04-15 02:31:19,807 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:19,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:19,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1536105960, now seen corresponding path program 344 times [2021-04-15 02:31:19,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:19,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485212833] [2021-04-15 02:31:19,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:19,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485212833] [2021-04-15 02:31:19,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051686550] [2021-04-15 02:31:19,892 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 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 02:31:19,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:31:19,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:19,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:19,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:19,965 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:31:19,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:19,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-04-15 02:31:19,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894891022] [2021-04-15 02:31:19,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:19,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:19,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:19,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:19,966 INFO L87 Difference]: Start difference. First operand 131222 states and 395903 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:31:20,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:20,579 INFO L93 Difference]: Finished difference Result 131505 states and 396305 transitions. [2021-04-15 02:31:20,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:31:20,579 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 24 [2021-04-15 02:31:20,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:20,829 INFO L225 Difference]: With dead ends: 131505 [2021-04-15 02:31:20,829 INFO L226 Difference]: Without dead ends: 131500 [2021-04-15 02:31:20,829 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 167.8ms TimeCoverageRelationStatistics Valid=244, Invalid=512, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:31:20,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131500 states. [2021-04-15 02:31:23,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131500 to 131222. [2021-04-15 02:31:23,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131222 states, 131221 states have (on average 3.016437917711342) internal successors, (395820), 131221 states have internal predecessors, (395820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:23,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131222 states to 131222 states and 395820 transitions. [2021-04-15 02:31:23,653 INFO L78 Accepts]: Start accepts. Automaton has 131222 states and 395820 transitions. Word has length 24 [2021-04-15 02:31:23,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:23,653 INFO L480 AbstractCegarLoop]: Abstraction has 131222 states and 395820 transitions. [2021-04-15 02:31:23,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:31:23,653 INFO L276 IsEmpty]: Start isEmpty. Operand 131222 states and 395820 transitions. [2021-04-15 02:31:23,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:31:23,699 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:23,699 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:23,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10641 [2021-04-15 02:31:23,899 INFO L428 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:23,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:23,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1664769748, now seen corresponding path program 345 times [2021-04-15 02:31:23,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:23,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029582819] [2021-04-15 02:31:23,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:23,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029582819] [2021-04-15 02:31:23,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499484768] [2021-04-15 02:31:23,992 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 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 02:31:24,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:31:24,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:24,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:31:24,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:24,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:24,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-04-15 02:31:24,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192246482] [2021-04-15 02:31:24,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:31:24,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:24,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:31:24,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:31:24,518 INFO L87 Difference]: Start difference. First operand 131222 states and 395820 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 02:31:25,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:25,213 INFO L93 Difference]: Finished difference Result 131512 states and 396230 transitions. [2021-04-15 02:31:25,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:31:25,214 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 24 [2021-04-15 02:31:25,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:25,478 INFO L225 Difference]: With dead ends: 131512 [2021-04-15 02:31:25,478 INFO L226 Difference]: Without dead ends: 131506 [2021-04-15 02:31:25,479 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 190.7ms TimeCoverageRelationStatistics Valid=276, Invalid=594, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:31:25,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131506 states. [2021-04-15 02:31:28,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131506 to 131222. [2021-04-15 02:31:28,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131222 states, 131221 states have (on average 3.014890909229468) internal successors, (395617), 131221 states have internal predecessors, (395617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:28,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131222 states to 131222 states and 395617 transitions. [2021-04-15 02:31:28,592 INFO L78 Accepts]: Start accepts. Automaton has 131222 states and 395617 transitions. Word has length 24 [2021-04-15 02:31:28,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:28,592 INFO L480 AbstractCegarLoop]: Abstraction has 131222 states and 395617 transitions. [2021-04-15 02:31:28,592 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 02:31:28,592 INFO L276 IsEmpty]: Start isEmpty. Operand 131222 states and 395617 transitions. [2021-04-15 02:31:28,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:31:28,635 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:28,635 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:28,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10642 [2021-04-15 02:31:28,835 INFO L428 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:28,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:28,836 INFO L82 PathProgramCache]: Analyzing trace with hash -2107668888, now seen corresponding path program 346 times [2021-04-15 02:31:28,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:28,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776507163] [2021-04-15 02:31:28,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:28,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:28,934 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:28,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776507163] [2021-04-15 02:31:28,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423704179] [2021-04-15 02:31:28,934 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 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 02:31:28,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:28,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:28,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:28,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:31:29,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:29,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-04-15 02:31:29,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47505941] [2021-04-15 02:31:29,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:31:29,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:29,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:31:29,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:31:29,009 INFO L87 Difference]: Start difference. First operand 131222 states and 395617 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 02:31:30,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:30,096 INFO L93 Difference]: Finished difference Result 134981 states and 404371 transitions. [2021-04-15 02:31:30,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:31:30,097 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 24 [2021-04-15 02:31:30,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:30,368 INFO L225 Difference]: With dead ends: 134981 [2021-04-15 02:31:30,368 INFO L226 Difference]: Without dead ends: 134973 [2021-04-15 02:31:30,368 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=271, Invalid=599, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:31:30,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134973 states. [2021-04-15 02:31:32,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134973 to 131282. [2021-04-15 02:31:32,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131282 states, 131281 states have (on average 3.014632734363693) internal successors, (395764), 131281 states have internal predecessors, (395764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:33,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131282 states to 131282 states and 395764 transitions. [2021-04-15 02:31:33,092 INFO L78 Accepts]: Start accepts. Automaton has 131282 states and 395764 transitions. Word has length 24 [2021-04-15 02:31:33,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:33,092 INFO L480 AbstractCegarLoop]: Abstraction has 131282 states and 395764 transitions. [2021-04-15 02:31:33,092 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 02:31:33,092 INFO L276 IsEmpty]: Start isEmpty. Operand 131282 states and 395764 transitions. [2021-04-15 02:31:33,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:31:33,135 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:33,135 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:33,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10643,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:33,335 INFO L428 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:33,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:33,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1342326956, now seen corresponding path program 347 times [2021-04-15 02:31:33,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:33,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100727214] [2021-04-15 02:31:33,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:33,464 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:33,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100727214] [2021-04-15 02:31:33,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005014632] [2021-04-15 02:31:33,465 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 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 02:31:33,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:31:33,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:33,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:31:33,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:33,546 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:33,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:33,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-04-15 02:31:33,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452917865] [2021-04-15 02:31:33,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:31:33,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:33,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:31:33,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:31:33,547 INFO L87 Difference]: Start difference. First operand 131282 states and 395764 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 02:31:34,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:34,724 INFO L93 Difference]: Finished difference Result 133765 states and 401069 transitions. [2021-04-15 02:31:34,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:31:34,725 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 24 [2021-04-15 02:31:34,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:34,993 INFO L225 Difference]: With dead ends: 133765 [2021-04-15 02:31:34,993 INFO L226 Difference]: Without dead ends: 133750 [2021-04-15 02:31:34,993 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 206.7ms TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:31:35,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133750 states. [2021-04-15 02:31:37,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133750 to 131295. [2021-04-15 02:31:37,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131295 states, 131294 states have (on average 3.0145475040748244) internal successors, (395792), 131294 states have internal predecessors, (395792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:37,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131295 states to 131295 states and 395792 transitions. [2021-04-15 02:31:37,610 INFO L78 Accepts]: Start accepts. Automaton has 131295 states and 395792 transitions. Word has length 24 [2021-04-15 02:31:37,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:37,610 INFO L480 AbstractCegarLoop]: Abstraction has 131295 states and 395792 transitions. [2021-04-15 02:31:37,610 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 02:31:37,610 INFO L276 IsEmpty]: Start isEmpty. Operand 131295 states and 395792 transitions. [2021-04-15 02:31:37,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:31:37,652 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:37,652 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:37,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10644,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:37,852 INFO L428 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:37,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:37,853 INFO L82 PathProgramCache]: Analyzing trace with hash 918015720, now seen corresponding path program 348 times [2021-04-15 02:31:37,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:37,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30554324] [2021-04-15 02:31:37,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:37,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30554324] [2021-04-15 02:31:37,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004758250] [2021-04-15 02:31:37,966 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 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 02:31:37,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:31:37,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:37,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:31:37,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:38,047 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:38,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:38,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-04-15 02:31:38,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173514017] [2021-04-15 02:31:38,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:31:38,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:38,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:31:38,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:31:38,048 INFO L87 Difference]: Start difference. First operand 131295 states and 395792 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 02:31:39,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:39,186 INFO L93 Difference]: Finished difference Result 133777 states and 401075 transitions. [2021-04-15 02:31:39,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:31:39,186 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 24 [2021-04-15 02:31:39,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:39,461 INFO L225 Difference]: With dead ends: 133777 [2021-04-15 02:31:39,461 INFO L226 Difference]: Without dead ends: 133759 [2021-04-15 02:31:39,461 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 218.4ms TimeCoverageRelationStatistics Valid=305, Invalid=687, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:31:39,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133759 states. [2021-04-15 02:31:41,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133759 to 131393. [2021-04-15 02:31:41,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131393 states, 131392 states have (on average 3.0140800048709204) internal successors, (396026), 131392 states have internal predecessors, (396026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:41,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131393 states to 131393 states and 396026 transitions. [2021-04-15 02:31:41,952 INFO L78 Accepts]: Start accepts. Automaton has 131393 states and 396026 transitions. Word has length 24 [2021-04-15 02:31:41,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:41,952 INFO L480 AbstractCegarLoop]: Abstraction has 131393 states and 396026 transitions. [2021-04-15 02:31:41,952 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 02:31:41,952 INFO L276 IsEmpty]: Start isEmpty. Operand 131393 states and 396026 transitions. [2021-04-15 02:31:41,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:31:41,996 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:41,996 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:42,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10645 [2021-04-15 02:31:42,196 INFO L428 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:42,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:42,197 INFO L82 PathProgramCache]: Analyzing trace with hash 649269292, now seen corresponding path program 349 times [2021-04-15 02:31:42,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:42,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313874336] [2021-04-15 02:31:42,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:42,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:42,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313874336] [2021-04-15 02:31:42,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968752243] [2021-04-15 02:31:42,316 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 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 02:31:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:42,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:42,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:31:42,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:42,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2021-04-15 02:31:42,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790739224] [2021-04-15 02:31:42,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:31:42,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:42,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:31:42,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:31:42,392 INFO L87 Difference]: Start difference. First operand 131393 states and 396026 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 02:31:43,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:43,067 INFO L93 Difference]: Finished difference Result 132504 states and 398292 transitions. [2021-04-15 02:31:43,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:31:43,068 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 24 [2021-04-15 02:31:43,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:43,863 INFO L225 Difference]: With dead ends: 132504 [2021-04-15 02:31:43,863 INFO L226 Difference]: Without dead ends: 132483 [2021-04-15 02:31:43,864 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:31:43,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132483 states. [2021-04-15 02:31:45,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132483 to 131393. [2021-04-15 02:31:46,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131393 states, 131392 states have (on average 3.0140571724305896) internal successors, (396023), 131392 states have internal predecessors, (396023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:46,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131393 states to 131393 states and 396023 transitions. [2021-04-15 02:31:46,397 INFO L78 Accepts]: Start accepts. Automaton has 131393 states and 396023 transitions. Word has length 24 [2021-04-15 02:31:46,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:46,397 INFO L480 AbstractCegarLoop]: Abstraction has 131393 states and 396023 transitions. [2021-04-15 02:31:46,397 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 02:31:46,397 INFO L276 IsEmpty]: Start isEmpty. Operand 131393 states and 396023 transitions. [2021-04-15 02:31:46,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:31:46,445 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:46,446 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:46,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10646,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:46,646 INFO L428 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:46,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:46,646 INFO L82 PathProgramCache]: Analyzing trace with hash 908064616, now seen corresponding path program 350 times [2021-04-15 02:31:46,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:46,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611506766] [2021-04-15 02:31:46,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 57 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:46,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611506766] [2021-04-15 02:31:46,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003028388] [2021-04-15 02:31:46,774 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 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 02:31:46,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:31:46,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:46,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:46,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:31:46,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:46,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2021-04-15 02:31:46,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962329097] [2021-04-15 02:31:46,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:31:46,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:46,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:31:46,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:31:46,852 INFO L87 Difference]: Start difference. First operand 131393 states and 396023 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 02:31:47,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:47,512 INFO L93 Difference]: Finished difference Result 132387 states and 398057 transitions. [2021-04-15 02:31:47,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:31:47,513 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 24 [2021-04-15 02:31:47,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:47,778 INFO L225 Difference]: With dead ends: 132387 [2021-04-15 02:31:47,778 INFO L226 Difference]: Without dead ends: 132363 [2021-04-15 02:31:47,778 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 261.7ms TimeCoverageRelationStatistics Valid=324, Invalid=732, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:31:48,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132363 states. [2021-04-15 02:31:50,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132363 to 131393. [2021-04-15 02:31:50,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131393 states, 131392 states have (on average 3.0140343399902583) internal successors, (396020), 131392 states have internal predecessors, (396020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:50,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131393 states to 131393 states and 396020 transitions. [2021-04-15 02:31:50,999 INFO L78 Accepts]: Start accepts. Automaton has 131393 states and 396020 transitions. Word has length 24 [2021-04-15 02:31:50,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:50,999 INFO L480 AbstractCegarLoop]: Abstraction has 131393 states and 396020 transitions. [2021-04-15 02:31:51,000 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 02:31:51,000 INFO L276 IsEmpty]: Start isEmpty. Operand 131393 states and 396020 transitions. [2021-04-15 02:31:51,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:31:51,047 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:51,047 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:51,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10647,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:51,247 INFO L428 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:51,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:51,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1884179694, now seen corresponding path program 351 times [2021-04-15 02:31:51,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:51,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053978075] [2021-04-15 02:31:51,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:51,347 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:51,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053978075] [2021-04-15 02:31:51,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499104878] [2021-04-15 02:31:51,347 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 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 02:31:51,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:31:51,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:51,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:31:51,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 63 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:51,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:51,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-04-15 02:31:51,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468016918] [2021-04-15 02:31:51,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:51,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:51,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:51,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:51,429 INFO L87 Difference]: Start difference. First operand 131393 states and 396020 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 02:31:52,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:52,025 INFO L93 Difference]: Finished difference Result 131727 states and 396599 transitions. [2021-04-15 02:31:52,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:31:52,025 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 24 [2021-04-15 02:31:52,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:52,297 INFO L225 Difference]: With dead ends: 131727 [2021-04-15 02:31:52,297 INFO L226 Difference]: Without dead ends: 131723 [2021-04-15 02:31:52,297 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 160.1ms TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:31:52,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131723 states. [2021-04-15 02:31:54,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131723 to 131445. [2021-04-15 02:31:54,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131445 states, 131444 states have (on average 3.013792946045464) internal successors, (396145), 131444 states have internal predecessors, (396145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131445 states to 131445 states and 396145 transitions. [2021-04-15 02:31:55,633 INFO L78 Accepts]: Start accepts. Automaton has 131445 states and 396145 transitions. Word has length 24 [2021-04-15 02:31:55,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:55,633 INFO L480 AbstractCegarLoop]: Abstraction has 131445 states and 396145 transitions. [2021-04-15 02:31:55,633 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 02:31:55,633 INFO L276 IsEmpty]: Start isEmpty. Operand 131445 states and 396145 transitions. [2021-04-15 02:31:55,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:31:55,704 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:55,704 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:55,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10648 [2021-04-15 02:31:55,913 INFO L428 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:55,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:55,913 INFO L82 PathProgramCache]: Analyzing trace with hash 705147248, now seen corresponding path program 352 times [2021-04-15 02:31:55,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:55,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622007790] [2021-04-15 02:31:55,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:56,007 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:56,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622007790] [2021-04-15 02:31:56,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140823738] [2021-04-15 02:31:56,008 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 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 02:31:56,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:56,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:56,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:56,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:31:56,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:56,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-04-15 02:31:56,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356034373] [2021-04-15 02:31:56,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:56,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:56,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:56,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:56,076 INFO L87 Difference]: Start difference. First operand 131445 states and 396145 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:31:56,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:56,672 INFO L93 Difference]: Finished difference Result 131922 states and 397089 transitions. [2021-04-15 02:31:56,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:31:56,673 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 24 [2021-04-15 02:31:56,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:56,923 INFO L225 Difference]: With dead ends: 131922 [2021-04-15 02:31:56,923 INFO L226 Difference]: Without dead ends: 131918 [2021-04-15 02:31:56,924 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 171.8ms TimeCoverageRelationStatistics Valid=235, Invalid=521, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:31:57,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131918 states. [2021-04-15 02:31:59,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131918 to 131425. [2021-04-15 02:31:59,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131425 states, 131424 states have (on average 3.013209155101047) internal successors, (396008), 131424 states have internal predecessors, (396008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:59,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131425 states to 131425 states and 396008 transitions. [2021-04-15 02:31:59,655 INFO L78 Accepts]: Start accepts. Automaton has 131425 states and 396008 transitions. Word has length 24 [2021-04-15 02:31:59,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:59,655 INFO L480 AbstractCegarLoop]: Abstraction has 131425 states and 396008 transitions. [2021-04-15 02:31:59,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 02:31:59,655 INFO L276 IsEmpty]: Start isEmpty. Operand 131425 states and 396008 transitions. [2021-04-15 02:31:59,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:31:59,698 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:59,698 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:59,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10649,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:59,898 INFO L428 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:59,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:59,898 INFO L82 PathProgramCache]: Analyzing trace with hash -139824204, now seen corresponding path program 353 times [2021-04-15 02:31:59,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:59,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663757904] [2021-04-15 02:31:59,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:59,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:00,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663757904] [2021-04-15 02:32:00,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764152850] [2021-04-15 02:32:00,003 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 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 02:32:00,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:32:00,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:00,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:00,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:00,534 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:32:00,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:00,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-04-15 02:32:00,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498784040] [2021-04-15 02:32:00,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:32:00,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:00,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:32:00,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:32:00,535 INFO L87 Difference]: Start difference. First operand 131425 states and 396008 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 02:32:01,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:01,183 INFO L93 Difference]: Finished difference Result 131927 states and 396979 transitions. [2021-04-15 02:32:01,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:32:01,184 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 24 [2021-04-15 02:32:01,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:01,443 INFO L225 Difference]: With dead ends: 131927 [2021-04-15 02:32:01,443 INFO L226 Difference]: Without dead ends: 131912 [2021-04-15 02:32:01,443 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:32:01,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131912 states. [2021-04-15 02:32:03,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131912 to 131483. [2021-04-15 02:32:03,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131483 states, 131482 states have (on average 3.012108121263747) internal successors, (396038), 131482 states have internal predecessors, (396038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:04,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131483 states to 131483 states and 396038 transitions. [2021-04-15 02:32:04,317 INFO L78 Accepts]: Start accepts. Automaton has 131483 states and 396038 transitions. Word has length 24 [2021-04-15 02:32:04,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:04,317 INFO L480 AbstractCegarLoop]: Abstraction has 131483 states and 396038 transitions. [2021-04-15 02:32:04,317 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 02:32:04,317 INFO L276 IsEmpty]: Start isEmpty. Operand 131483 states and 396038 transitions. [2021-04-15 02:32:04,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:32:04,364 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:04,364 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:04,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10650 [2021-04-15 02:32:04,565 INFO L428 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:04,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:04,565 INFO L82 PathProgramCache]: Analyzing trace with hash -564135440, now seen corresponding path program 354 times [2021-04-15 02:32:04,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:04,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229299276] [2021-04-15 02:32:04,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:04,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229299276] [2021-04-15 02:32:04,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236791093] [2021-04-15 02:32:04,675 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 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 02:32:04,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:32:04,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:04,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:32:04,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:04,746 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:04,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:04,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-04-15 02:32:04,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180639783] [2021-04-15 02:32:04,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:32:04,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:04,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:32:04,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:32:04,747 INFO L87 Difference]: Start difference. First operand 131483 states and 396038 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 02:32:05,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:05,897 INFO L93 Difference]: Finished difference Result 132364 states and 397834 transitions. [2021-04-15 02:32:05,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:32:05,898 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 24 [2021-04-15 02:32:05,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:06,158 INFO L225 Difference]: With dead ends: 132364 [2021-04-15 02:32:06,159 INFO L226 Difference]: Without dead ends: 132358 [2021-04-15 02:32:06,159 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 220.1ms TimeCoverageRelationStatistics Valid=303, Invalid=689, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:32:06,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132358 states. [2021-04-15 02:32:08,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132358 to 131489. [2021-04-15 02:32:08,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131489 states, 131488 states have (on average 3.0120695424677537) internal successors, (396051), 131488 states have internal predecessors, (396051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:08,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131489 states to 131489 states and 396051 transitions. [2021-04-15 02:32:08,861 INFO L78 Accepts]: Start accepts. Automaton has 131489 states and 396051 transitions. Word has length 24 [2021-04-15 02:32:08,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:08,862 INFO L480 AbstractCegarLoop]: Abstraction has 131489 states and 396051 transitions. [2021-04-15 02:32:08,862 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 02:32:08,862 INFO L276 IsEmpty]: Start isEmpty. Operand 131489 states and 396051 transitions. [2021-04-15 02:32:08,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:32:08,906 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:08,906 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:09,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10651 [2021-04-15 02:32:09,107 INFO L428 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:09,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:09,107 INFO L82 PathProgramCache]: Analyzing trace with hash -832881868, now seen corresponding path program 355 times [2021-04-15 02:32:09,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:09,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092018892] [2021-04-15 02:32:09,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:09,231 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:09,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092018892] [2021-04-15 02:32:09,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161890484] [2021-04-15 02:32:09,231 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 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 02:32:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:09,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:09,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:09,298 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:32:09,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:09,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-04-15 02:32:09,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675150576] [2021-04-15 02:32:09,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:32:09,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:09,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:32:09,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:32:09,299 INFO L87 Difference]: Start difference. First operand 131489 states and 396051 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 02:32:10,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:10,479 INFO L93 Difference]: Finished difference Result 132345 states and 397806 transitions. [2021-04-15 02:32:10,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:32:10,480 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 24 [2021-04-15 02:32:10,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:10,786 INFO L225 Difference]: With dead ends: 132345 [2021-04-15 02:32:10,786 INFO L226 Difference]: Without dead ends: 132338 [2021-04-15 02:32:10,786 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 230.4ms TimeCoverageRelationStatistics Valid=306, Invalid=686, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:32:10,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132338 states. Received shutdown request... [2021-04-15 02:32:11,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10652 [2021-04-15 02:32:11,963 WARN L545 AbstractCegarLoop]: Verification canceled [2021-04-15 02:32:11,967 WARN L224 ceAbstractionStarter]: Timeout [2021-04-15 02:32:11,967 INFO L202 PluginConnector]: Adding new model unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 02:32:11 BasicIcfg [2021-04-15 02:32:11,967 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 02:32:11,968 INFO L168 Benchmark]: Toolchain (without parser) took 734847.73 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 236.5 MB in the beginning and 10.1 GB in the end (delta: -9.8 GB). Peak memory consumption was 6.7 GB. Max. memory is 16.0 GB. [2021-04-15 02:32:11,968 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 02:32:11,968 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.54 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 02:32:11,968 INFO L168 Benchmark]: Boogie Preprocessor took 15.57 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.1 MB in the end (delta: 855.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 02:32:11,968 INFO L168 Benchmark]: RCFGBuilder took 354.20 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 236.4 MB in the end (delta: -2.2 MB). Peak memory consumption was 20.8 MB. Max. memory is 16.0 GB. [2021-04-15 02:32:11,968 INFO L168 Benchmark]: TraceAbstraction took 734446.73 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 235.6 MB in the beginning and 10.1 GB in the end (delta: -9.8 GB). Peak memory consumption was 6.7 GB. Max. memory is 16.0 GB. [2021-04-15 02:32:11,969 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 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.54 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.57 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.1 MB in the end (delta: 855.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 354.20 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 236.4 MB in the end (delta: -2.2 MB). Peak memory consumption was 20.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 734446.73 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 235.6 MB in the beginning and 10.1 GB in the end (delta: -9.8 GB). Peak memory consumption was 6.7 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 55). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 734357.0ms, OverallIterations: 359, TraceHistogramMax: 12, EmptinessCheckTime: 6479.7ms, AutomataDifference: 185263.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6036 SDtfs, 28402 SDslu, 35820 SDs, 0 SdLazy, 49216 SolverSat, 9648 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 22945.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15417 GetRequests, 7079 SyntacticMatches, 168 SemanticMatches, 8170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52083 ImplicationChecksByTransitivity, 58807.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=131489occurred in iteration=358, InterpolantAutomatonStates: 7168, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 366950.9ms AutomataMinimizationTime, 359 MinimizatonAttempts, 563638 StatesRemovedByMinimization, 353 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1554.8ms SsaConstructionTime, 4378.7ms SatisfiabilityAnalysisTime, 91030.5ms InterpolantComputationTime, 14789 NumberOfCodeBlocks, 14788 NumberOfCodeBlocksAsserted, 1619 NumberOfCheckSat, 14074 ConstructedInterpolants, 0 QuantifiedInterpolants, 61970 SizeOfPredicates, 192 NumberOfNonLiveVariables, 30131 ConjunctsInSsa, 5016 ConjunctsInUnsatCore, 715 InterpolantComputations, 3 PerfectInterpolantSequences, 14152/36970 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